/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:18:50,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:18:50,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:18:50,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:18:50,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 14:18:50,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:18:50,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:18:50,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:18:50,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:18:50,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:18:50,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:18:50,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:18:50,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:18:50,419 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:18:50,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:18:50,419 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:18:50,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:18:50,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:18:50,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:18:50,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:18:50,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:18:50,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:18:50,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:18:50,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:18:50,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:18:50,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:18:50,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:18:50,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:18:50,422 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:18:50,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:18:50,422 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:18:50,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:18:50,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:18:50,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:18:50,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:18:50,614 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:18:50,615 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:18:50,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2022-02-16 14:18:50,616 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2022-02-16 14:18:50,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:18:50,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:18:50,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:18:50,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:18:50,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:18:50,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,655 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:18:50,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:18:50,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:18:50,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:18:50,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:18:50,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:18:50,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:18:50,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:18:50,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:18:50,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/1) ... [2022-02-16 14:18:50,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:18:50,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:18:50,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-16 14:18:50,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-16 14:18:50,758 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:18:50,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:18:50,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:18:50,758 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:18:50,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:18:50,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:18:50,759 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:18:50,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:18:50,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:18:50,760 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 14:18:50,797 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:18:50,798 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:18:50,886 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:18:50,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:18:50,897 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:18:50,899 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:18:50 BoogieIcfgContainer [2022-02-16 14:18:50,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:18:50,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:18:50,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:18:50,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:18:50,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:18:50" (1/2) ... [2022-02-16 14:18:50,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f50535e and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:18:50, skipping insertion in model container [2022-02-16 14:18:50,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:18:50" (2/2) ... [2022-02-16 14:18:50,932 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2022-02-16 14:18:50,936 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:18:50,936 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:18:50,936 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:18:50,936 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:18:50,976 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-16 14:18:51,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:18:51,058 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-16 14:18:51,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 14:18:51,066 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-02-16 14:18:51,088 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:55,036 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 223473 transitions and produced 112297 states. [2022-02-16 14:18:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 112297 states, 85139 states have (on average 1.8943962226476703) internal successors, (161287), 112296 states have internal predecessors, (161287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 14:18:55,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:18:55,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:18:55,652 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:18:55,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:18:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1160028785, now seen corresponding path program 1 times [2022-02-16 14:18:55,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:18:55,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767594193] [2022-02-16 14:18:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:18:55,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:18:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:18:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:55,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:18:55,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767594193] [2022-02-16 14:18:55,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767594193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:18:55,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:18:55,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:18:55,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503954161] [2022-02-16 14:18:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:18:55,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:18:55,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:18:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:18:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:18:56,408 INFO L87 Difference]: Start difference. First operand has 112297 states, 85139 states have (on average 1.8943962226476703) internal successors, (161287), 112296 states have internal predecessors, (161287), 0 states have call successors, (0), 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, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:18:58,137 INFO L93 Difference]: Finished difference Result 112033 states and 161023 transitions. [2022-02-16 14:18:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:18:58,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:18:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:18:58,678 INFO L225 Difference]: With dead ends: 112033 [2022-02-16 14:18:58,678 INFO L226 Difference]: Without dead ends: 78800 [2022-02-16 14:18:58,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:18:58,697 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:18:58,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:18:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78800 states. [2022-02-16 14:18:59,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78800 to 55. [2022-02-16 14:18:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 54 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2022-02-16 14:18:59,607 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 83 transitions. Word has length 14 [2022-02-16 14:18:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:18:59,608 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 83 transitions. [2022-02-16 14:18:59,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 83 transitions. [2022-02-16 14:18:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 14:18:59,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:18:59,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:18:59,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:18:59,616 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:18:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:18:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash -316006220, now seen corresponding path program 1 times [2022-02-16 14:18:59,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:18:59,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670952441] [2022-02-16 14:18:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:18:59,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:18:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:18:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:59,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:18:59,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670952441] [2022-02-16 14:18:59,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670952441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:18:59,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:18:59,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:18:59,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417306434] [2022-02-16 14:18:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:18:59,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:18:59,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:18:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:18:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:18:59,733 INFO L87 Difference]: Start difference. First operand 55 states and 83 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:18:59,798 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2022-02-16 14:18:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:18:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 14:18:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:18:59,799 INFO L225 Difference]: With dead ends: 67 [2022-02-16 14:18:59,800 INFO L226 Difference]: Without dead ends: 63 [2022-02-16 14:18:59,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 14:18:59,802 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:18:59,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:18:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-16 14:18:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-16 14:18:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.564516129032258) internal successors, (97), 62 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 97 transitions. [2022-02-16 14:18:59,812 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 97 transitions. Word has length 18 [2022-02-16 14:18:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:18:59,812 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 97 transitions. [2022-02-16 14:18:59,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:59,812 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 97 transitions. [2022-02-16 14:18:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-16 14:18:59,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:18:59,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:18:59,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 14:18:59,814 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:18:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:18:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash 151362758, now seen corresponding path program 1 times [2022-02-16 14:18:59,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:18:59,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498073310] [2022-02-16 14:18:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:18:59,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:18:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:18:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:59,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:18:59,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498073310] [2022-02-16 14:18:59,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498073310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:18:59,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681361329] [2022-02-16 14:18:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:18:59,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:18:59,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:18:59,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:00,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 14:19:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-16 14:19:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:00,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-16 14:19:00,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 14:19:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:00,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:00,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:00,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-16 14:19:00,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:00,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681361329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:00,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:00,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-02-16 14:19:00,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133663310] [2022-02-16 14:19:00,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:00,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 14:19:00,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:00,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 14:19:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-16 14:19:00,445 INFO L87 Difference]: Start difference. First operand 63 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2022-02-16 14:19:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:00,540 INFO L93 Difference]: Finished difference Result 125 states and 198 transitions. [2022-02-16 14:19:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 14:19:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 23 [2022-02-16 14:19:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:00,541 INFO L225 Difference]: With dead ends: 125 [2022-02-16 14:19:00,541 INFO L226 Difference]: Without dead ends: 115 [2022-02-16 14:19:00,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-02-16 14:19:00,542 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:00,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 97 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:19:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-16 14:19:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2022-02-16 14:19:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5326086956521738) internal successors, (141), 92 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 141 transitions. [2022-02-16 14:19:00,546 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 141 transitions. Word has length 23 [2022-02-16 14:19:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:00,546 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 141 transitions. [2022-02-16 14:19:00,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2022-02-16 14:19:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 141 transitions. [2022-02-16 14:19:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-16 14:19:00,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:00,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:00,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:00,764 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 [2022-02-16 14:19:00,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2001999735, now seen corresponding path program 2 times [2022-02-16 14:19:00,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:00,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234456000] [2022-02-16 14:19:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:00,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:00,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:00,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234456000] [2022-02-16 14:19:00,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234456000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:00,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175661947] [2022-02-16 14:19:00,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:19:00,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:00,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:00,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:00,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 14:19:00,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:19:00,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 14:19:00,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:00,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:00,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175661947] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:00,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:00,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-02-16 14:19:00,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099018642] [2022-02-16 14:19:00,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:00,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 14:19:00,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:00,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 14:19:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:19:00,958 INFO L87 Difference]: Start difference. First operand 93 states and 141 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:01,020 INFO L93 Difference]: Finished difference Result 217 states and 311 transitions. [2022-02-16 14:19:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 14:19:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 27 [2022-02-16 14:19:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:01,021 INFO L225 Difference]: With dead ends: 217 [2022-02-16 14:19:01,021 INFO L226 Difference]: Without dead ends: 208 [2022-02-16 14:19:01,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:19:01,022 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:01,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 81 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:19:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-16 14:19:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 186. [2022-02-16 14:19:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5135135135135136) internal successors, (280), 185 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2022-02-16 14:19:01,026 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 27 [2022-02-16 14:19:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:01,026 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2022-02-16 14:19:01,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:01,027 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2022-02-16 14:19:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:19:01,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:01,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:01,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:01,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-16 14:19:01,241 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1394991287, now seen corresponding path program 3 times [2022-02-16 14:19:01,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:01,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834488728] [2022-02-16 14:19:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:01,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:01,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:01,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834488728] [2022-02-16 14:19:01,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834488728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:01,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143785143] [2022-02-16 14:19:01,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:19:01,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:01,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:01,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:01,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 14:19:01,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:19:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:01,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 14:19:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:01,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:01,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-16 14:19:02,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:02,152 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 20 treesize of output 38 [2022-02-16 14:19:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:02,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:03,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:03,471 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 31 treesize of output 45 [2022-02-16 14:19:03,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:03,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143785143] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:03,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:03,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-02-16 14:19:03,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837651360] [2022-02-16 14:19:03,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:03,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:19:03,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:19:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:19:03,561 INFO L87 Difference]: Start difference. First operand 186 states and 280 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:04,562 INFO L93 Difference]: Finished difference Result 369 states and 563 transitions. [2022-02-16 14:19:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:19:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:19:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:04,563 INFO L225 Difference]: With dead ends: 369 [2022-02-16 14:19:04,563 INFO L226 Difference]: Without dead ends: 351 [2022-02-16 14:19:04,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=565, Invalid=2857, Unknown=0, NotChecked=0, Total=3422 [2022-02-16 14:19:04,565 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 142 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:04,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 376 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 348 Invalid, 0 Unknown, 305 Unchecked, 0.2s Time] [2022-02-16 14:19:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-16 14:19:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 244. [2022-02-16 14:19:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.5884773662551441) internal successors, (386), 243 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) [2022-02-16 14:19:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 386 transitions. [2022-02-16 14:19:04,571 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 386 transitions. Word has length 32 [2022-02-16 14:19:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:04,572 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 386 transitions. [2022-02-16 14:19:04,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 386 transitions. [2022-02-16 14:19:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:19:04,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:04,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:04,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:04,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:04,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash 27455057, now seen corresponding path program 4 times [2022-02-16 14:19:04,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:04,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862587] [2022-02-16 14:19:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:04,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:05,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:05,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862587] [2022-02-16 14:19:05,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862587] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:05,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388620426] [2022-02-16 14:19:05,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:19:05,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:05,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:05,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 14:19:05,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:19:05,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:05,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:19:05,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:05,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:05,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-16 14:19:05,469 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:19:05,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-02-16 14:19:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:05,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:05,722 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:05,723 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 34 treesize of output 56 [2022-02-16 14:19:05,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:05,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388620426] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:05,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:05,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-02-16 14:19:05,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042653385] [2022-02-16 14:19:05,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:05,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:19:05,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:05,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:19:05,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:19:05,915 INFO L87 Difference]: Start difference. First operand 244 states and 386 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:06,359 INFO L93 Difference]: Finished difference Result 457 states and 707 transitions. [2022-02-16 14:19:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:19:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-16 14:19:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:06,360 INFO L225 Difference]: With dead ends: 457 [2022-02-16 14:19:06,360 INFO L226 Difference]: Without dead ends: 447 [2022-02-16 14:19:06,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:19:06,361 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 148 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:06,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 276 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 556 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-02-16 14:19:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-16 14:19:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 230. [2022-02-16 14:19:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5502183406113537) internal successors, (355), 229 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 355 transitions. [2022-02-16 14:19:06,366 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 355 transitions. Word has length 32 [2022-02-16 14:19:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:06,366 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 355 transitions. [2022-02-16 14:19:06,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 355 transitions. [2022-02-16 14:19:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:19:06,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:06,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:06,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:06,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:06,573 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:06,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2096069043, now seen corresponding path program 5 times [2022-02-16 14:19:06,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:06,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979747018] [2022-02-16 14:19:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:06,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:19:06,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:06,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979747018] [2022-02-16 14:19:06,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979747018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:06,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181622202] [2022-02-16 14:19:06,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:19:06,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:06,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:06,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 14:19:06,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:19:06,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:06,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:19:06,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:07,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:07,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:19:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:07,277 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 [2022-02-16 14:19:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:07,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:07,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:07,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:07,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-02-16 14:19:07,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:07,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181622202] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:07,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:07,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-02-16 14:19:07,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337800175] [2022-02-16 14:19:07,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:07,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-16 14:19:07,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:07,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-16 14:19:07,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:19:07,871 INFO L87 Difference]: Start difference. First operand 230 states and 355 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:08,238 INFO L93 Difference]: Finished difference Result 424 states and 660 transitions. [2022-02-16 14:19:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 14:19:08,238 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:19:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:08,239 INFO L225 Difference]: With dead ends: 424 [2022-02-16 14:19:08,239 INFO L226 Difference]: Without dead ends: 409 [2022-02-16 14:19:08,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:19:08,240 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:08,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 238 Invalid, 0 Unknown, 204 Unchecked, 0.1s Time] [2022-02-16 14:19:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-16 14:19:08,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 256. [2022-02-16 14:19:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.588235294117647) internal successors, (405), 255 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 405 transitions. [2022-02-16 14:19:08,244 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 405 transitions. Word has length 32 [2022-02-16 14:19:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:08,244 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 405 transitions. [2022-02-16 14:19:08,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 405 transitions. [2022-02-16 14:19:08,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:19:08,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:08,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:08,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-16 14:19:08,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:08,456 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:08,456 INFO L85 PathProgramCache]: Analyzing trace with hash -845481489, now seen corresponding path program 6 times [2022-02-16 14:19:08,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:08,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755825554] [2022-02-16 14:19:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:08,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:08,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:08,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755825554] [2022-02-16 14:19:08,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755825554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:08,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137499239] [2022-02-16 14:19:08,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:19:08,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:08,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:08,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:08,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 14:19:08,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:19:08,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:08,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:19:08,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:08,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:08,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-16 14:19:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:09,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:09,140 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 [2022-02-16 14:19:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:09,442 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:09,442 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 [2022-02-16 14:19:09,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:09,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137499239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:09,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:09,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-16 14:19:09,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766641965] [2022-02-16 14:19:09,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:09,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-16 14:19:09,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-16 14:19:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:19:09,561 INFO L87 Difference]: Start difference. First operand 256 states and 405 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:09,864 INFO L93 Difference]: Finished difference Result 338 states and 516 transitions. [2022-02-16 14:19:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:19:09,865 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:19:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:09,865 INFO L225 Difference]: With dead ends: 338 [2022-02-16 14:19:09,865 INFO L226 Difference]: Without dead ends: 325 [2022-02-16 14:19:09,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:19:09,866 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:09,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 153 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 276 Invalid, 0 Unknown, 211 Unchecked, 0.1s Time] [2022-02-16 14:19:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-16 14:19:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 270. [2022-02-16 14:19:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.587360594795539) internal successors, (427), 269 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 427 transitions. [2022-02-16 14:19:09,870 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 427 transitions. Word has length 32 [2022-02-16 14:19:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:09,870 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 427 transitions. [2022-02-16 14:19:09,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 427 transitions. [2022-02-16 14:19:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:19:09,871 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:09,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:09,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:10,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:10,081 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash 514741517, now seen corresponding path program 7 times [2022-02-16 14:19:10,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:10,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085010261] [2022-02-16 14:19:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:10,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:10,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:10,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085010261] [2022-02-16 14:19:10,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085010261] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:10,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934938370] [2022-02-16 14:19:10,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:19:10,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:10,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:10,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:10,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 14:19:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:19:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:10,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:10,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-02-16 14:19:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:10,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:10,734 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 [2022-02-16 14:19:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:10,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:10,986 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:10,987 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 34 treesize of output 56 [2022-02-16 14:19:11,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:11,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934938370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:11,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:11,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 27 [2022-02-16 14:19:11,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209131110] [2022-02-16 14:19:11,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:11,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:19:11,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:19:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:19:11,157 INFO L87 Difference]: Start difference. First operand 270 states and 427 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:11,394 INFO L93 Difference]: Finished difference Result 408 states and 629 transitions. [2022-02-16 14:19:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:19:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:19:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:11,395 INFO L225 Difference]: With dead ends: 408 [2022-02-16 14:19:11,395 INFO L226 Difference]: Without dead ends: 391 [2022-02-16 14:19:11,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:19:11,396 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:11,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 133 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 226 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-02-16 14:19:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-16 14:19:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 285. [2022-02-16 14:19:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5985915492957747) internal successors, (454), 284 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) [2022-02-16 14:19:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 454 transitions. [2022-02-16 14:19:11,400 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 454 transitions. Word has length 32 [2022-02-16 14:19:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:11,401 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 454 transitions. [2022-02-16 14:19:11,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 454 transitions. [2022-02-16 14:19:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:19:11,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:11,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:11,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-16 14:19:11,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:11,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash -589360435, now seen corresponding path program 8 times [2022-02-16 14:19:11,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:11,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968576939] [2022-02-16 14:19:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:11,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:19:11,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:11,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968576939] [2022-02-16 14:19:11,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968576939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:11,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514278435] [2022-02-16 14:19:11,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:19:11,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:11,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:11,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:11,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 14:19:11,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:19:11,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:19:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:12,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:12,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:19:12,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:12,279 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 [2022-02-16 14:19:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:12,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:12,599 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:12,599 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 [2022-02-16 14:19:12,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:12,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514278435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:12,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:12,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-16 14:19:12,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443326460] [2022-02-16 14:19:12,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:12,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:19:12,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:19:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:19:12,751 INFO L87 Difference]: Start difference. First operand 285 states and 454 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:12,971 INFO L93 Difference]: Finished difference Result 501 states and 779 transitions. [2022-02-16 14:19:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:19:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:19:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:12,972 INFO L225 Difference]: With dead ends: 501 [2022-02-16 14:19:12,972 INFO L226 Difference]: Without dead ends: 455 [2022-02-16 14:19:12,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:19:12,973 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:12,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 271 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 234 Invalid, 0 Unknown, 485 Unchecked, 0.1s Time] [2022-02-16 14:19:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-16 14:19:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 302. [2022-02-16 14:19:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.584717607973422) internal successors, (477), 301 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 477 transitions. [2022-02-16 14:19:12,977 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 477 transitions. Word has length 32 [2022-02-16 14:19:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:12,978 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 477 transitions. [2022-02-16 14:19:12,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 477 transitions. [2022-02-16 14:19:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-16 14:19:12,978 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:12,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:12,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:13,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-16 14:19:13,179 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:13,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1424352939, now seen corresponding path program 9 times [2022-02-16 14:19:13,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:13,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255733992] [2022-02-16 14:19:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:13,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:19:13,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:13,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255733992] [2022-02-16 14:19:13,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255733992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:13,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874021276] [2022-02-16 14:19:13,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:19:13,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:13,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:13,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:13,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 14:19:13,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:19:13,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:13,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 14:19:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:13,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:13,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:19:13,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:13,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-02-16 14:19:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:13,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:15,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:15,161 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-02-16 14:19:15,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:15,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874021276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:15,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:15,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 31 [2022-02-16 14:19:15,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509553316] [2022-02-16 14:19:15,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:15,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-16 14:19:15,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-16 14:19:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:19:15,268 INFO L87 Difference]: Start difference. First operand 302 states and 477 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:15,668 INFO L93 Difference]: Finished difference Result 408 states and 627 transitions. [2022-02-16 14:19:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:19:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2022-02-16 14:19:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:15,669 INFO L225 Difference]: With dead ends: 408 [2022-02-16 14:19:15,669 INFO L226 Difference]: Without dead ends: 395 [2022-02-16 14:19:15,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:19:15,670 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:15,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 135 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 169 Unchecked, 0.0s Time] [2022-02-16 14:19:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-16 14:19:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 319. [2022-02-16 14:19:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.5943396226415094) internal successors, (507), 318 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 507 transitions. [2022-02-16 14:19:15,677 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 507 transitions. Word has length 32 [2022-02-16 14:19:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:15,677 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 507 transitions. [2022-02-16 14:19:15,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 507 transitions. [2022-02-16 14:19:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:15,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:15,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:15,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:15,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:15,910 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash -668885306, now seen corresponding path program 1 times [2022-02-16 14:19:15,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:15,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587603338] [2022-02-16 14:19:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:15,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:16,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:16,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587603338] [2022-02-16 14:19:16,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587603338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:16,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631528959] [2022-02-16 14:19:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:16,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:16,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:16,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:16,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 14:19:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:19:16,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:16,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:16,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-02-16 14:19:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:16,558 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 [2022-02-16 14:19:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:16,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:16,859 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:16,859 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 34 treesize of output 56 [2022-02-16 14:19:16,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:16,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631528959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:16,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:16,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-02-16 14:19:16,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712370253] [2022-02-16 14:19:16,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:16,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:19:16,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:19:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:19:16,980 INFO L87 Difference]: Start difference. First operand 319 states and 507 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:17,188 INFO L93 Difference]: Finished difference Result 528 states and 829 transitions. [2022-02-16 14:19:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:19:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:19:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:17,190 INFO L225 Difference]: With dead ends: 528 [2022-02-16 14:19:17,190 INFO L226 Difference]: Without dead ends: 507 [2022-02-16 14:19:17,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:19:17,191 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:17,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 142 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 218 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2022-02-16 14:19:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-16 14:19:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 339. [2022-02-16 14:19:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.6242603550295858) internal successors, (549), 338 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 549 transitions. [2022-02-16 14:19:17,196 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 549 transitions. Word has length 35 [2022-02-16 14:19:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:17,196 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 549 transitions. [2022-02-16 14:19:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 549 transitions. [2022-02-16 14:19:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:17,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:17,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:17,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:17,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-16 14:19:17,407 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1267673798, now seen corresponding path program 2 times [2022-02-16 14:19:17,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:17,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017044086] [2022-02-16 14:19:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:17,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-16 14:19:17,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:17,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017044086] [2022-02-16 14:19:17,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017044086] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:19:17,427 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:19:17,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:19:17,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341479433] [2022-02-16 14:19:17,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:19:17,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:19:17,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:19:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:19:17,428 INFO L87 Difference]: Start difference. First operand 339 states and 549 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2022-02-16 14:19:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:17,439 INFO L93 Difference]: Finished difference Result 334 states and 527 transitions. [2022-02-16 14:19:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:19:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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 35 [2022-02-16 14:19:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:17,440 INFO L225 Difference]: With dead ends: 334 [2022-02-16 14:19:17,440 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 14:19:17,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:19:17,441 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 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 [2022-02-16 14:19:17,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:19:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 14:19:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 292. [2022-02-16 14:19:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.6460481099656357) internal successors, (479), 291 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 479 transitions. [2022-02-16 14:19:17,447 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 479 transitions. Word has length 35 [2022-02-16 14:19:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:17,447 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 479 transitions. [2022-02-16 14:19:17,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 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) [2022-02-16 14:19:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 479 transitions. [2022-02-16 14:19:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:17,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:17,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:17,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-16 14:19:17,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1240514822, now seen corresponding path program 3 times [2022-02-16 14:19:17,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:17,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502857223] [2022-02-16 14:19:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:17,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:17,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:17,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502857223] [2022-02-16 14:19:17,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502857223] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:17,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072132988] [2022-02-16 14:19:17,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:19:17,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:17,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:17,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:17,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 14:19:17,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:19:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 14:19:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:17,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:17,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-16 14:19:18,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:18,046 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 20 treesize of output 38 [2022-02-16 14:19:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:18,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:19,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:19,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:19,462 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-02-16 14:19:19,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:19,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072132988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:19,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:19,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-02-16 14:19:19,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119833151] [2022-02-16 14:19:19,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:19,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-16 14:19:19,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-16 14:19:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 14:19:19,541 INFO L87 Difference]: Start difference. First operand 292 states and 479 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:20,042 INFO L93 Difference]: Finished difference Result 435 states and 680 transitions. [2022-02-16 14:19:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:19:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:19:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:20,044 INFO L225 Difference]: With dead ends: 435 [2022-02-16 14:19:20,044 INFO L226 Difference]: Without dead ends: 410 [2022-02-16 14:19:20,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:19:20,045 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:20,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 164 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 112 Unchecked, 0.0s Time] [2022-02-16 14:19:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-16 14:19:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 308. [2022-02-16 14:19:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.6612377850162867) internal successors, (510), 307 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 510 transitions. [2022-02-16 14:19:20,051 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 510 transitions. Word has length 35 [2022-02-16 14:19:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:20,051 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 510 transitions. [2022-02-16 14:19:20,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 510 transitions. [2022-02-16 14:19:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:20,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:20,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:20,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-16 14:19:20,284 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 [2022-02-16 14:19:20,284 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash 992621160, now seen corresponding path program 4 times [2022-02-16 14:19:20,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:20,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607007879] [2022-02-16 14:19:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:20,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:20,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:20,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607007879] [2022-02-16 14:19:20,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607007879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:20,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287415280] [2022-02-16 14:19:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:19:20,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:20,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:20,438 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:20,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 14:19:20,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:19:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:19:20,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:20,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:20,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-16 14:19:20,849 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:19:20,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-02-16 14:19:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:20,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:21,127 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:21,127 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 34 treesize of output 56 [2022-02-16 14:19:21,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:21,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287415280] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:21,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:21,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-02-16 14:19:21,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541040344] [2022-02-16 14:19:21,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:21,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:19:21,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:19:21,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:19:21,223 INFO L87 Difference]: Start difference. First operand 308 states and 510 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:21,436 INFO L93 Difference]: Finished difference Result 554 states and 895 transitions. [2022-02-16 14:19:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:19:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:19:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:21,437 INFO L225 Difference]: With dead ends: 554 [2022-02-16 14:19:21,437 INFO L226 Difference]: Without dead ends: 548 [2022-02-16 14:19:21,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:19:21,438 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:21,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 256 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 488 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-02-16 14:19:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-02-16 14:19:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 303. [2022-02-16 14:19:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.6523178807947019) internal successors, (499), 302 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 499 transitions. [2022-02-16 14:19:21,443 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 499 transitions. Word has length 35 [2022-02-16 14:19:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:21,443 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 499 transitions. [2022-02-16 14:19:21,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 499 transitions. [2022-02-16 14:19:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:21,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:21,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:21,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:21,651 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 [2022-02-16 14:19:21,651 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:21,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1693698916, now seen corresponding path program 5 times [2022-02-16 14:19:21,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:21,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588710564] [2022-02-16 14:19:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:21,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:21,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:21,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588710564] [2022-02-16 14:19:21,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588710564] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:21,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610714930] [2022-02-16 14:19:21,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:19:21,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:21,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:21,876 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:21,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 14:19:21,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:19:21,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:21,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:19:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:22,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:22,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:19:22,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:22,377 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 [2022-02-16 14:19:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:22,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:22,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:22,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:22,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:22,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-02-16 14:19:22,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:22,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610714930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:22,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:22,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-02-16 14:19:22,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075497071] [2022-02-16 14:19:22,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:22,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-16 14:19:22,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-16 14:19:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:19:22,908 INFO L87 Difference]: Start difference. First operand 303 states and 499 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 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) [2022-02-16 14:19:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:23,254 INFO L93 Difference]: Finished difference Result 463 states and 731 transitions. [2022-02-16 14:19:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:19:23,254 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 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) Word has length 35 [2022-02-16 14:19:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:23,255 INFO L225 Difference]: With dead ends: 463 [2022-02-16 14:19:23,255 INFO L226 Difference]: Without dead ends: 452 [2022-02-16 14:19:23,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:19:23,256 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:23,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 136 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 234 Invalid, 0 Unknown, 168 Unchecked, 0.1s Time] [2022-02-16 14:19:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-16 14:19:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 292. [2022-02-16 14:19:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.6391752577319587) internal successors, (477), 291 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 477 transitions. [2022-02-16 14:19:23,260 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 477 transitions. Word has length 35 [2022-02-16 14:19:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:23,260 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 477 transitions. [2022-02-16 14:19:23,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 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) [2022-02-16 14:19:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 477 transitions. [2022-02-16 14:19:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:23,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:23,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:23,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:23,461 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 [2022-02-16 14:19:23,461 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1247851616, now seen corresponding path program 6 times [2022-02-16 14:19:23,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:23,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177838743] [2022-02-16 14:19:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:23,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:23,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:23,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177838743] [2022-02-16 14:19:23,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177838743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:23,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118404499] [2022-02-16 14:19:23,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:19:23,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:23,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:23,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:23,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 14:19:23,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:19:23,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:23,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 14:19:23,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:23,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:23,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2022-02-16 14:19:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:24,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:24,197 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 26 [2022-02-16 14:19:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:24,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:26,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:26,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:26,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:26,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2022-02-16 14:19:26,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:26,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118404499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:26,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:26,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-02-16 14:19:26,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773106974] [2022-02-16 14:19:26,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:26,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-16 14:19:26,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-16 14:19:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:19:26,497 INFO L87 Difference]: Start difference. First operand 292 states and 477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:27,885 INFO L93 Difference]: Finished difference Result 832 states and 1298 transitions. [2022-02-16 14:19:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-16 14:19:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:19:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:27,886 INFO L225 Difference]: With dead ends: 832 [2022-02-16 14:19:27,886 INFO L226 Difference]: Without dead ends: 788 [2022-02-16 14:19:27,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1069, Invalid=4187, Unknown=0, NotChecked=0, Total=5256 [2022-02-16 14:19:27,888 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 363 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:27,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 331 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 376 Invalid, 0 Unknown, 680 Unchecked, 0.2s Time] [2022-02-16 14:19:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-16 14:19:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 383. [2022-02-16 14:19:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.6832460732984293) internal successors, (643), 382 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) [2022-02-16 14:19:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 643 transitions. [2022-02-16 14:19:27,893 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 643 transitions. Word has length 35 [2022-02-16 14:19:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:27,893 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 643 transitions. [2022-02-16 14:19:27,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 643 transitions. [2022-02-16 14:19:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:27,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:27,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:27,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:28,095 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 [2022-02-16 14:19:28,095 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash -991730562, now seen corresponding path program 7 times [2022-02-16 14:19:28,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:28,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548390331] [2022-02-16 14:19:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:28,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:28,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:28,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548390331] [2022-02-16 14:19:28,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548390331] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:28,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722112470] [2022-02-16 14:19:28,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:19:28,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:28,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:28,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 14:19:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:28,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:19:28,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:28,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:28,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-02-16 14:19:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:28,728 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 [2022-02-16 14:19:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:28,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:29,058 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:29,058 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 34 treesize of output 56 [2022-02-16 14:19:29,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:29,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722112470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:29,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:29,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-16 14:19:29,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776516204] [2022-02-16 14:19:29,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:29,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:19:29,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:19:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:19:29,287 INFO L87 Difference]: Start difference. First operand 383 states and 643 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:29,483 INFO L93 Difference]: Finished difference Result 545 states and 873 transitions. [2022-02-16 14:19:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:19:29,483 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:19:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:29,483 INFO L225 Difference]: With dead ends: 545 [2022-02-16 14:19:29,484 INFO L226 Difference]: Without dead ends: 529 [2022-02-16 14:19:29,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:19:29,485 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:29,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 121 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 186 Unchecked, 0.1s Time] [2022-02-16 14:19:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-02-16 14:19:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 406. [2022-02-16 14:19:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.6790123456790123) internal successors, (680), 405 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 680 transitions. [2022-02-16 14:19:29,499 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 680 transitions. Word has length 35 [2022-02-16 14:19:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:29,499 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 680 transitions. [2022-02-16 14:19:29,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 680 transitions. [2022-02-16 14:19:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:29,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:29,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:29,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-16 14:19:29,715 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 [2022-02-16 14:19:29,716 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:29,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1246249956, now seen corresponding path program 8 times [2022-02-16 14:19:29,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:29,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483235088] [2022-02-16 14:19:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:29,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:29,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:29,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483235088] [2022-02-16 14:19:29,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483235088] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:29,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227497137] [2022-02-16 14:19:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:19:29,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:29,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:29,912 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:29,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 14:19:29,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:19:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-16 14:19:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:30,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:30,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:19:30,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:30,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:30,327 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 [2022-02-16 14:19:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:30,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:30,644 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:30,645 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 [2022-02-16 14:19:30,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:19:30,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227497137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:30,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:30,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 26 [2022-02-16 14:19:30,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422729404] [2022-02-16 14:19:30,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:30,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:19:30,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:30,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:19:30,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:19:30,806 INFO L87 Difference]: Start difference. First operand 406 states and 680 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:30,995 INFO L93 Difference]: Finished difference Result 687 states and 1120 transitions. [2022-02-16 14:19:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:19:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:19:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:30,997 INFO L225 Difference]: With dead ends: 687 [2022-02-16 14:19:30,997 INFO L226 Difference]: Without dead ends: 676 [2022-02-16 14:19:30,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:19:30,997 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:30,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 139 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2022-02-16 14:19:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-16 14:19:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 405. [2022-02-16 14:19:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.6782178217821782) internal successors, (678), 404 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 678 transitions. [2022-02-16 14:19:31,003 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 678 transitions. Word has length 35 [2022-02-16 14:19:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:31,003 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 678 transitions. [2022-02-16 14:19:31,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:31,003 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 678 transitions. [2022-02-16 14:19:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-16 14:19:31,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:31,004 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:31,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:31,220 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 [2022-02-16 14:19:31,221 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash -260418554, now seen corresponding path program 9 times [2022-02-16 14:19:31,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:31,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992761591] [2022-02-16 14:19:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:31,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:31,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:31,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992761591] [2022-02-16 14:19:31,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992761591] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:31,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090182276] [2022-02-16 14:19:31,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:19:31,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:31,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:31,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 14:19:31,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:19:31,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-16 14:19:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:31,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:31,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 14:19:31,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:31,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:31,904 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 [2022-02-16 14:19:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:31,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:32,256 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:32,256 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 [2022-02-16 14:19:32,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:32,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090182276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:32,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:32,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 27 [2022-02-16 14:19:32,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250051191] [2022-02-16 14:19:32,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:32,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:19:32,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:19:32,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:19:32,401 INFO L87 Difference]: Start difference. First operand 405 states and 678 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:32,676 INFO L93 Difference]: Finished difference Result 719 states and 1174 transitions. [2022-02-16 14:19:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:19:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-16 14:19:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:32,678 INFO L225 Difference]: With dead ends: 719 [2022-02-16 14:19:32,678 INFO L226 Difference]: Without dead ends: 708 [2022-02-16 14:19:32,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 14:19:32,679 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:32,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 142 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 331 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-02-16 14:19:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-16 14:19:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 405. [2022-02-16 14:19:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.6782178217821782) internal successors, (678), 404 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 678 transitions. [2022-02-16 14:19:32,688 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 678 transitions. Word has length 35 [2022-02-16 14:19:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:32,688 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 678 transitions. [2022-02-16 14:19:32,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 678 transitions. [2022-02-16 14:19:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-16 14:19:32,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:32,689 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:32,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:32,903 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 [2022-02-16 14:19:32,904 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2143892486, now seen corresponding path program 10 times [2022-02-16 14:19:32,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:32,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036163942] [2022-02-16 14:19:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:32,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:32,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:32,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036163942] [2022-02-16 14:19:32,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036163942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:32,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800463151] [2022-02-16 14:19:32,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:19:32,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:32,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:32,945 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:32,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 14:19:32,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:19:32,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:32,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:19:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:33,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:33,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800463151] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:33,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:33,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-02-16 14:19:33,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004460193] [2022-02-16 14:19:33,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:33,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 14:19:33,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 14:19:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-16 14:19:33,075 INFO L87 Difference]: Start difference. First operand 405 states and 678 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:33,103 INFO L93 Difference]: Finished difference Result 644 states and 1056 transitions. [2022-02-16 14:19:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 14:19:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-16 14:19:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:33,104 INFO L225 Difference]: With dead ends: 644 [2022-02-16 14:19:33,104 INFO L226 Difference]: Without dead ends: 630 [2022-02-16 14:19:33,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-02-16 14:19:33,105 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:33,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 70 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:19:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-16 14:19:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 546. [2022-02-16 14:19:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 1.6844036697247706) internal successors, (918), 545 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 918 transitions. [2022-02-16 14:19:33,111 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 918 transitions. Word has length 36 [2022-02-16 14:19:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:33,111 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 918 transitions. [2022-02-16 14:19:33,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 918 transitions. [2022-02-16 14:19:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:19:33,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:33,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:33,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:33,323 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 [2022-02-16 14:19:33,324 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:33,324 INFO L85 PathProgramCache]: Analyzing trace with hash -669493733, now seen corresponding path program 11 times [2022-02-16 14:19:33,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:33,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762276485] [2022-02-16 14:19:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:33,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-16 14:19:33,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:33,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762276485] [2022-02-16 14:19:33,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762276485] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:33,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033716184] [2022-02-16 14:19:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:19:33,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:33,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:33,364 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:33,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 14:19:33,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:19:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:19:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-16 14:19:33,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-16 14:19:33,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033716184] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:19:33,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-16 14:19:33,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-02-16 14:19:33,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608332474] [2022-02-16 14:19:33,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:19:33,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 14:19:33,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 14:19:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:19:33,429 INFO L87 Difference]: Start difference. First operand 546 states and 918 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2022-02-16 14:19:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:33,437 INFO L93 Difference]: Finished difference Result 633 states and 1038 transitions. [2022-02-16 14:19:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:19:33,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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 37 [2022-02-16 14:19:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:33,438 INFO L225 Difference]: With dead ends: 633 [2022-02-16 14:19:33,438 INFO L226 Difference]: Without dead ends: 633 [2022-02-16 14:19:33,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:19:33,439 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:33,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:19:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-16 14:19:33,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 373. [2022-02-16 14:19:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.596774193548387) internal successors, (594), 372 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 594 transitions. [2022-02-16 14:19:33,444 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 594 transitions. Word has length 37 [2022-02-16 14:19:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:33,444 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 594 transitions. [2022-02-16 14:19:33,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2022-02-16 14:19:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 594 transitions. [2022-02-16 14:19:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-16 14:19:33,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:33,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:33,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:33,661 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 [2022-02-16 14:19:33,661 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1204040643, now seen corresponding path program 10 times [2022-02-16 14:19:33,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:33,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146509350] [2022-02-16 14:19:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:33,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:33,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:33,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146509350] [2022-02-16 14:19:33,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146509350] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:33,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011504637] [2022-02-16 14:19:33,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:19:33,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:33,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:33,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 14:19:33,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:19:33,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-16 14:19:33,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:34,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:34,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-02-16 14:19:34,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:34,356 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 [2022-02-16 14:19:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:34,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:34,720 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:19:34,721 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 34 treesize of output 56 [2022-02-16 14:19:34,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:19:34,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011504637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:34,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:34,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-16 14:19:34,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940277179] [2022-02-16 14:19:34,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:34,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-16 14:19:34,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-16 14:19:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-16 14:19:34,943 INFO L87 Difference]: Start difference. First operand 373 states and 594 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:35,167 INFO L93 Difference]: Finished difference Result 644 states and 1021 transitions. [2022-02-16 14:19:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 14:19:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-16 14:19:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:35,168 INFO L225 Difference]: With dead ends: 644 [2022-02-16 14:19:35,168 INFO L226 Difference]: Without dead ends: 631 [2022-02-16 14:19:35,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:19:35,176 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:35,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 185 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 149 Unchecked, 0.0s Time] [2022-02-16 14:19:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-16 14:19:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 377. [2022-02-16 14:19:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.6063829787234043) internal successors, (604), 376 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 604 transitions. [2022-02-16 14:19:35,193 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 604 transitions. Word has length 38 [2022-02-16 14:19:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:35,193 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 604 transitions. [2022-02-16 14:19:35,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 604 transitions. [2022-02-16 14:19:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:19:35,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:35,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:35,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:35,394 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 [2022-02-16 14:19:35,394 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash -24260186, now seen corresponding path program 11 times [2022-02-16 14:19:35,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:35,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100728198] [2022-02-16 14:19:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:35,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-16 14:19:35,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:35,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100728198] [2022-02-16 14:19:35,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100728198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:35,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537928073] [2022-02-16 14:19:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:19:35,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:35,436 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:35,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 14:19:35,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:19:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:19:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-16 14:19:35,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-16 14:19:35,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537928073] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:19:35,519 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-16 14:19:35,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-02-16 14:19:35,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750270711] [2022-02-16 14:19:35,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:19:35,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:19:35,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:19:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:19:35,520 INFO L87 Difference]: Start difference. First operand 377 states and 604 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2022-02-16 14:19:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:35,535 INFO L93 Difference]: Finished difference Result 455 states and 710 transitions. [2022-02-16 14:19:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:19:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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 40 [2022-02-16 14:19:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:35,536 INFO L225 Difference]: With dead ends: 455 [2022-02-16 14:19:35,536 INFO L226 Difference]: Without dead ends: 455 [2022-02-16 14:19:35,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:19:35,537 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:35,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:19:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-16 14:19:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 301. [2022-02-16 14:19:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.51) internal successors, (453), 300 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 453 transitions. [2022-02-16 14:19:35,540 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 453 transitions. Word has length 40 [2022-02-16 14:19:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:35,540 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 453 transitions. [2022-02-16 14:19:35,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) [2022-02-16 14:19:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 453 transitions. [2022-02-16 14:19:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:19:35,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:35,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:35,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:35,757 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 [2022-02-16 14:19:35,757 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2024155020, now seen corresponding path program 12 times [2022-02-16 14:19:35,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:35,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017165045] [2022-02-16 14:19:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:35,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:36,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:36,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017165045] [2022-02-16 14:19:36,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017165045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:36,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955735286] [2022-02-16 14:19:36,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:19:36,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:36,195 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:36,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 14:19:36,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:19:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:19:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:36,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:36,641 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 [2022-02-16 14:19:37,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:37,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:37,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:37,234 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 [2022-02-16 14:19:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:37,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:40,355 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-16 14:19:40,355 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 [2022-02-16 14:19:40,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:40,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955735286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:40,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:40,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-16 14:19:40,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807262549] [2022-02-16 14:19:40,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:40,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-16 14:19:40,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-16 14:19:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:19:40,759 INFO L87 Difference]: Start difference. First operand 301 states and 453 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:42,252 INFO L93 Difference]: Finished difference Result 553 states and 821 transitions. [2022-02-16 14:19:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-16 14:19:42,252 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:19:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:42,253 INFO L225 Difference]: With dead ends: 553 [2022-02-16 14:19:42,253 INFO L226 Difference]: Without dead ends: 547 [2022-02-16 14:19:42,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2425 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=940, Invalid=5866, Unknown=0, NotChecked=0, Total=6806 [2022-02-16 14:19:42,255 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:42,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 361 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 213 Invalid, 0 Unknown, 441 Unchecked, 0.1s Time] [2022-02-16 14:19:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-02-16 14:19:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 359. [2022-02-16 14:19:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.5614525139664805) internal successors, (559), 358 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 559 transitions. [2022-02-16 14:19:42,259 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 559 transitions. Word has length 41 [2022-02-16 14:19:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:42,259 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 559 transitions. [2022-02-16 14:19:42,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 559 transitions. [2022-02-16 14:19:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:19:42,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:42,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:42,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:42,476 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 [2022-02-16 14:19:42,476 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1695529784, now seen corresponding path program 13 times [2022-02-16 14:19:42,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:42,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501165634] [2022-02-16 14:19:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:42,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:42,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:42,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501165634] [2022-02-16 14:19:42,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501165634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:42,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849664529] [2022-02-16 14:19:42,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:19:42,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:42,945 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:42,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 14:19:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:19:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:43,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:43,446 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 [2022-02-16 14:19:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:43,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:43,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:43,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:43,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:43,926 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 [2022-02-16 14:19:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:44,824 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:19:44,824 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 [2022-02-16 14:19:45,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:45,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849664529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:45,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:45,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 48 [2022-02-16 14:19:45,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574331749] [2022-02-16 14:19:45,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:45,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-16 14:19:45,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-16 14:19:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:19:45,168 INFO L87 Difference]: Start difference. First operand 359 states and 559 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:45,912 INFO L93 Difference]: Finished difference Result 907 states and 1387 transitions. [2022-02-16 14:19:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-16 14:19:45,913 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:19:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:45,914 INFO L225 Difference]: With dead ends: 907 [2022-02-16 14:19:45,914 INFO L226 Difference]: Without dead ends: 901 [2022-02-16 14:19:45,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=458, Invalid=3324, Unknown=0, NotChecked=0, Total=3782 [2022-02-16 14:19:45,915 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 152 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:45,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 600 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 671 Invalid, 0 Unknown, 1102 Unchecked, 0.3s Time] [2022-02-16 14:19:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-02-16 14:19:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 421. [2022-02-16 14:19:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.5714285714285714) internal successors, (660), 420 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 660 transitions. [2022-02-16 14:19:45,920 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 660 transitions. Word has length 41 [2022-02-16 14:19:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:45,920 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 660 transitions. [2022-02-16 14:19:45,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 660 transitions. [2022-02-16 14:19:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:19:45,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:45,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:45,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:46,122 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 [2022-02-16 14:19:46,122 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1638593966, now seen corresponding path program 14 times [2022-02-16 14:19:46,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:46,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335473183] [2022-02-16 14:19:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:46,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:46,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:46,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335473183] [2022-02-16 14:19:46,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335473183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:46,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200096159] [2022-02-16 14:19:46,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:19:46,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:46,519 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:46,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 14:19:46,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:19:46,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:19:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:47,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:47,020 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 [2022-02-16 14:19:47,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:47,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:47,526 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 [2022-02-16 14:19:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:47,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:50,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:50,816 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-16 14:19:50,817 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 [2022-02-16 14:19:51,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:51,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200096159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:51,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:51,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-16 14:19:51,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109407768] [2022-02-16 14:19:51,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:51,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-16 14:19:51,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:51,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-16 14:19:51,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:19:51,496 INFO L87 Difference]: Start difference. First operand 421 states and 660 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:53,590 INFO L93 Difference]: Finished difference Result 935 states and 1389 transitions. [2022-02-16 14:19:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:19:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:19:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:53,592 INFO L225 Difference]: With dead ends: 935 [2022-02-16 14:19:53,592 INFO L226 Difference]: Without dead ends: 929 [2022-02-16 14:19:53,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1182, Invalid=7374, Unknown=0, NotChecked=0, Total=8556 [2022-02-16 14:19:53,594 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 186 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:53,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 396 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 220 Invalid, 0 Unknown, 642 Unchecked, 0.1s Time] [2022-02-16 14:19:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-02-16 14:19:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 448. [2022-02-16 14:19:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.58165548098434) internal successors, (707), 447 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 707 transitions. [2022-02-16 14:19:53,600 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 707 transitions. Word has length 41 [2022-02-16 14:19:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:53,600 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 707 transitions. [2022-02-16 14:19:53,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 707 transitions. [2022-02-16 14:19:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:19:53,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:53,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:53,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:53,816 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 [2022-02-16 14:19:53,816 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:19:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash -437002066, now seen corresponding path program 15 times [2022-02-16 14:19:53,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:53,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687902470] [2022-02-16 14:19:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:53,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:54,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:54,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687902470] [2022-02-16 14:19:54,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687902470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:54,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421442791] [2022-02-16 14:19:54,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:19:54,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:54,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:54,320 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:19:54,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 14:19:54,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:19:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-16 14:19:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:54,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:54,786 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 [2022-02-16 14:19:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:55,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:55,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:55,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 50 [2022-02-16 14:19:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:55,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:56,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:56,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:56,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:56,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:56,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:56,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:56,584 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 43 treesize of output 55 [2022-02-16 14:19:56,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:19:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:56,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421442791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:56,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:56,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-16 14:19:56,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593173187] [2022-02-16 14:19:56,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:56,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-16 14:19:56,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-16 14:19:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2385, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:19:56,746 INFO L87 Difference]: Start difference. First operand 448 states and 707 transitions. Second operand has 54 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:02,251 INFO L93 Difference]: Finished difference Result 1989 states and 3065 transitions. [2022-02-16 14:20:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-16 14:20:02,251 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:02,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:02,253 INFO L225 Difference]: With dead ends: 1989 [2022-02-16 14:20:02,253 INFO L226 Difference]: Without dead ends: 1959 [2022-02-16 14:20:02,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 61 SyntacticMatches, 15 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2864, Invalid=17158, Unknown=0, NotChecked=0, Total=20022 [2022-02-16 14:20:02,257 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 504 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 3410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2007 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:02,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1036 Invalid, 3410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1224 Invalid, 0 Unknown, 2007 Unchecked, 0.6s Time] [2022-02-16 14:20:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-02-16 14:20:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 594. [2022-02-16 14:20:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.6779089376053964) internal successors, (995), 593 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 995 transitions. [2022-02-16 14:20:02,268 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 995 transitions. Word has length 41 [2022-02-16 14:20:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:02,268 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 995 transitions. [2022-02-16 14:20:02,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 995 transitions. [2022-02-16 14:20:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:02,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:02,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:02,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:02,482 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 [2022-02-16 14:20:02,482 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:02,483 INFO L85 PathProgramCache]: Analyzing trace with hash 29549192, now seen corresponding path program 16 times [2022-02-16 14:20:02,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:02,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723808883] [2022-02-16 14:20:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:02,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:20:02,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:02,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723808883] [2022-02-16 14:20:02,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723808883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:02,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531835297] [2022-02-16 14:20:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:20:02,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:02,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:02,871 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:02,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 14:20:02,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:20:02,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:02,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:02,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:03,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:03,431 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 [2022-02-16 14:20:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:03,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:03,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:03,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:03,686 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 [2022-02-16 14:20:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:03,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:04,373 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:20:04,374 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 [2022-02-16 14:20:04,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:04,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531835297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:04,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:04,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-02-16 14:20:04,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428328721] [2022-02-16 14:20:04,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:04,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-16 14:20:04,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:04,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-16 14:20:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:20:04,793 INFO L87 Difference]: Start difference. First operand 594 states and 995 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:06,200 INFO L93 Difference]: Finished difference Result 1300 states and 2068 transitions. [2022-02-16 14:20:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-16 14:20:06,200 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:06,202 INFO L225 Difference]: With dead ends: 1300 [2022-02-16 14:20:06,202 INFO L226 Difference]: Without dead ends: 1277 [2022-02-16 14:20:06,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=854, Invalid=5626, Unknown=0, NotChecked=0, Total=6480 [2022-02-16 14:20:06,208 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 161 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 766 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:06,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 369 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 482 Invalid, 0 Unknown, 766 Unchecked, 0.2s Time] [2022-02-16 14:20:06,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-02-16 14:20:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 687. [2022-02-16 14:20:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.7303206997084548) internal successors, (1187), 686 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1187 transitions. [2022-02-16 14:20:06,218 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1187 transitions. Word has length 41 [2022-02-16 14:20:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:06,218 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1187 transitions. [2022-02-16 14:20:06,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1187 transitions. [2022-02-16 14:20:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:06,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:06,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:06,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:06,431 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 [2022-02-16 14:20:06,431 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2117463714, now seen corresponding path program 17 times [2022-02-16 14:20:06,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:06,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912434752] [2022-02-16 14:20:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:06,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:20:06,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:06,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912434752] [2022-02-16 14:20:06,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912434752] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:06,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98929664] [2022-02-16 14:20:06,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:20:06,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:06,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:06,884 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:06,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 14:20:06,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:20:06,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:06,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:07,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:07,651 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 [2022-02-16 14:20:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:07,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:07,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:07,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:07,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:07,889 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 [2022-02-16 14:20:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:07,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:08,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:08,455 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 [2022-02-16 14:20:08,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:08,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98929664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:08,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:08,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 52 [2022-02-16 14:20:08,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020238984] [2022-02-16 14:20:08,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:08,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-16 14:20:08,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-16 14:20:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:20:08,687 INFO L87 Difference]: Start difference. First operand 687 states and 1187 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:10,613 INFO L93 Difference]: Finished difference Result 1556 states and 2567 transitions. [2022-02-16 14:20:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-16 14:20:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:10,615 INFO L225 Difference]: With dead ends: 1556 [2022-02-16 14:20:10,615 INFO L226 Difference]: Without dead ends: 1530 [2022-02-16 14:20:10,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1828, Invalid=8072, Unknown=0, NotChecked=0, Total=9900 [2022-02-16 14:20:10,622 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 161 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:10,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 357 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 508 Invalid, 0 Unknown, 1148 Unchecked, 0.2s Time] [2022-02-16 14:20:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-02-16 14:20:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 872. [2022-02-16 14:20:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.8185993111366245) internal successors, (1584), 871 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1584 transitions. [2022-02-16 14:20:10,655 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1584 transitions. Word has length 41 [2022-02-16 14:20:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:10,655 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1584 transitions. [2022-02-16 14:20:10,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1584 transitions. [2022-02-16 14:20:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:10,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:10,659 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:10,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:10,864 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 [2022-02-16 14:20:10,865 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash 674712674, now seen corresponding path program 18 times [2022-02-16 14:20:10,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:10,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685008571] [2022-02-16 14:20:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:10,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:20:11,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:11,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685008571] [2022-02-16 14:20:11,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685008571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:11,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867488785] [2022-02-16 14:20:11,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:20:11,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:11,234 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:11,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 14:20:11,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:20:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:11,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-16 14:20:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:12,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:12,152 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 [2022-02-16 14:20:12,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:12,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:12,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:12,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:12,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:12,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:12,273 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2022-02-16 14:20:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:12,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:13,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:13,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:13,472 INFO L353 Elim1Store]: treesize reduction 16, result has 78.1 percent of original size [2022-02-16 14:20:13,472 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 86 [2022-02-16 14:20:13,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:13,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867488785] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:13,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:13,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 51 [2022-02-16 14:20:13,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117440558] [2022-02-16 14:20:13,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:13,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-16 14:20:13,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:13,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-16 14:20:13,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-02-16 14:20:13,899 INFO L87 Difference]: Start difference. First operand 872 states and 1584 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:18,154 INFO L93 Difference]: Finished difference Result 2214 states and 3794 transitions. [2022-02-16 14:20:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-16 14:20:18,155 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:18,157 INFO L225 Difference]: With dead ends: 2214 [2022-02-16 14:20:18,157 INFO L226 Difference]: Without dead ends: 2189 [2022-02-16 14:20:18,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 13 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5998 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2249, Invalid=13753, Unknown=0, NotChecked=0, Total=16002 [2022-02-16 14:20:18,160 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 267 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 4820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4084 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:18,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 632 Invalid, 4820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 661 Invalid, 0 Unknown, 4084 Unchecked, 0.3s Time] [2022-02-16 14:20:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-02-16 14:20:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1069. [2022-02-16 14:20:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 1.8558052434456929) internal successors, (1982), 1068 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1982 transitions. [2022-02-16 14:20:18,173 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1982 transitions. Word has length 41 [2022-02-16 14:20:18,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:18,173 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1982 transitions. [2022-02-16 14:20:18,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1982 transitions. [2022-02-16 14:20:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:18,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:18,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:18,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:18,390 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 [2022-02-16 14:20:18,391 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -906614852, now seen corresponding path program 19 times [2022-02-16 14:20:18,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:18,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445068143] [2022-02-16 14:20:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:18,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:18,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:18,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445068143] [2022-02-16 14:20:18,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445068143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:18,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144568330] [2022-02-16 14:20:18,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:20:18,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:18,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:18,781 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:18,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 14:20:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:18,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:19,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:19,551 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 [2022-02-16 14:20:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:19,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:19,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:19,871 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 [2022-02-16 14:20:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:19,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:20,324 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:20:20,325 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 [2022-02-16 14:20:20,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:20,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144568330] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:20,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:20,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 45 [2022-02-16 14:20:20,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476294148] [2022-02-16 14:20:20,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:20,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:20:20,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:20,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:20:20,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:20:20,614 INFO L87 Difference]: Start difference. First operand 1069 states and 1982 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:21,484 INFO L93 Difference]: Finished difference Result 1865 states and 3290 transitions. [2022-02-16 14:20:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-16 14:20:21,484 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:21,486 INFO L225 Difference]: With dead ends: 1865 [2022-02-16 14:20:21,486 INFO L226 Difference]: Without dead ends: 1848 [2022-02-16 14:20:21,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=841, Invalid=5011, Unknown=0, NotChecked=0, Total=5852 [2022-02-16 14:20:21,487 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 140 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:21,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 268 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 479 Invalid, 0 Unknown, 1137 Unchecked, 0.1s Time] [2022-02-16 14:20:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-02-16 14:20:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1483. [2022-02-16 14:20:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 1.869770580296896) internal successors, (2771), 1482 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 2771 transitions. [2022-02-16 14:20:21,502 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 2771 transitions. Word has length 41 [2022-02-16 14:20:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:21,502 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 2771 transitions. [2022-02-16 14:20:21,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 2771 transitions. [2022-02-16 14:20:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:21,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:21,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:21,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:21,719 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 [2022-02-16 14:20:21,719 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1440563780, now seen corresponding path program 20 times [2022-02-16 14:20:21,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:21,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647064737] [2022-02-16 14:20:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:21,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:22,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:22,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647064737] [2022-02-16 14:20:22,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647064737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:22,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438983088] [2022-02-16 14:20:22,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:20:22,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:22,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:22,119 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:22,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 14:20:22,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:20:22,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:22,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:22,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:22,844 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 [2022-02-16 14:20:23,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:23,062 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 [2022-02-16 14:20:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:23,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:23,751 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:20:23,751 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 [2022-02-16 14:20:24,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:24,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438983088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:24,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:24,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 45 [2022-02-16 14:20:24,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588430479] [2022-02-16 14:20:24,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:24,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:20:24,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:24,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:20:24,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:20:24,106 INFO L87 Difference]: Start difference. First operand 1483 states and 2771 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:26,664 INFO L93 Difference]: Finished difference Result 3169 states and 5681 transitions. [2022-02-16 14:20:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-16 14:20:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:26,669 INFO L225 Difference]: With dead ends: 3169 [2022-02-16 14:20:26,669 INFO L226 Difference]: Without dead ends: 3138 [2022-02-16 14:20:26,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 69 SyntacticMatches, 21 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1846, Invalid=10586, Unknown=0, NotChecked=0, Total=12432 [2022-02-16 14:20:26,675 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 237 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1972 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:26,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 311 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 836 Invalid, 0 Unknown, 1972 Unchecked, 0.3s Time] [2022-02-16 14:20:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-02-16 14:20:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1938. [2022-02-16 14:20:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 1.8554465668559628) internal successors, (3594), 1937 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 3594 transitions. [2022-02-16 14:20:26,699 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 3594 transitions. Word has length 41 [2022-02-16 14:20:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:26,699 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 3594 transitions. [2022-02-16 14:20:26,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 3594 transitions. [2022-02-16 14:20:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:26,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:26,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:26,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:26,923 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 [2022-02-16 14:20:26,923 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash 335275204, now seen corresponding path program 21 times [2022-02-16 14:20:26,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:26,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457952031] [2022-02-16 14:20:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:26,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:27,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:27,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457952031] [2022-02-16 14:20:27,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457952031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:27,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247024552] [2022-02-16 14:20:27,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:20:27,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:27,411 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:27,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 14:20:27,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:20:27,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:20:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:27,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:27,957 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 [2022-02-16 14:20:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:28,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:28,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:28,343 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 5 new quantified variables, introduced 7 case distinctions, treesize of input 44 treesize of output 88 [2022-02-16 14:20:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:29,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:31,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:31,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:31,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:31,528 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 41 treesize of output 71 [2022-02-16 14:20:31,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:31,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247024552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:31,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:31,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 54 [2022-02-16 14:20:31,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695125435] [2022-02-16 14:20:31,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:31,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-16 14:20:31,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-16 14:20:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2533, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:20:31,907 INFO L87 Difference]: Start difference. First operand 1938 states and 3594 transitions. Second operand has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:35,891 INFO L93 Difference]: Finished difference Result 2690 states and 4682 transitions. [2022-02-16 14:20:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-16 14:20:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:35,895 INFO L225 Difference]: With dead ends: 2690 [2022-02-16 14:20:35,895 INFO L226 Difference]: Without dead ends: 2658 [2022-02-16 14:20:35,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4946 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2083, Invalid=12197, Unknown=0, NotChecked=0, Total=14280 [2022-02-16 14:20:35,897 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 412 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1970 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:35,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 808 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 439 Invalid, 0 Unknown, 1970 Unchecked, 0.2s Time] [2022-02-16 14:20:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2022-02-16 14:20:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2016. [2022-02-16 14:20:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 1.8575682382133996) internal successors, (3743), 2015 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3743 transitions. [2022-02-16 14:20:35,924 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3743 transitions. Word has length 41 [2022-02-16 14:20:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:35,924 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3743 transitions. [2022-02-16 14:20:35,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3743 transitions. [2022-02-16 14:20:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:35,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:35,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:35,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:36,139 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 [2022-02-16 14:20:36,140 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash 282305122, now seen corresponding path program 22 times [2022-02-16 14:20:36,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:36,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432452027] [2022-02-16 14:20:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:36,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:36,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:36,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432452027] [2022-02-16 14:20:36,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432452027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:36,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945352874] [2022-02-16 14:20:36,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:20:36,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:36,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:36,576 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:36,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 14:20:36,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:20:36,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:36,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:37,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:37,018 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 [2022-02-16 14:20:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:37,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:37,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:37,466 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 [2022-02-16 14:20:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:37,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:38,163 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:20:38,163 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 [2022-02-16 14:20:38,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:38,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945352874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:38,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:38,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 48 [2022-02-16 14:20:38,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42679840] [2022-02-16 14:20:38,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:38,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-16 14:20:38,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-16 14:20:38,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:20:38,916 INFO L87 Difference]: Start difference. First operand 2016 states and 3743 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:39,746 INFO L93 Difference]: Finished difference Result 3332 states and 6062 transitions. [2022-02-16 14:20:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-16 14:20:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:39,761 INFO L225 Difference]: With dead ends: 3332 [2022-02-16 14:20:39,761 INFO L226 Difference]: Without dead ends: 3326 [2022-02-16 14:20:39,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=495, Invalid=3537, Unknown=0, NotChecked=0, Total=4032 [2022-02-16 14:20:39,762 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 161 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:39,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 350 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 644 Invalid, 0 Unknown, 557 Unchecked, 0.3s Time] [2022-02-16 14:20:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2022-02-16 14:20:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2028. [2022-02-16 14:20:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 1.8539713862851506) internal successors, (3758), 2027 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 3758 transitions. [2022-02-16 14:20:39,798 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 3758 transitions. Word has length 41 [2022-02-16 14:20:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:39,798 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 3758 transitions. [2022-02-16 14:20:39,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 3758 transitions. [2022-02-16 14:20:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:39,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:39,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:39,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:40,016 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 [2022-02-16 14:20:40,017 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash 748856380, now seen corresponding path program 23 times [2022-02-16 14:20:40,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:40,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542841815] [2022-02-16 14:20:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:40,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:20:40,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:40,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542841815] [2022-02-16 14:20:40,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542841815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:40,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758780792] [2022-02-16 14:20:40,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:20:40,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:40,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:40,448 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:40,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 14:20:40,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:20:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:20:40,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:41,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:41,140 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 [2022-02-16 14:20:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:41,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:41,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:41,353 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 [2022-02-16 14:20:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:41,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:41,878 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:20:41,879 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 [2022-02-16 14:20:42,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:42,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758780792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:42,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:42,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-02-16 14:20:42,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798432284] [2022-02-16 14:20:42,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:42,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-16 14:20:42,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-16 14:20:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:20:42,128 INFO L87 Difference]: Start difference. First operand 2028 states and 3758 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:43,750 INFO L93 Difference]: Finished difference Result 3534 states and 6358 transitions. [2022-02-16 14:20:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-16 14:20:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:43,754 INFO L225 Difference]: With dead ends: 3534 [2022-02-16 14:20:43,755 INFO L226 Difference]: Without dead ends: 3507 [2022-02-16 14:20:43,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2659 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=992, Invalid=6664, Unknown=0, NotChecked=0, Total=7656 [2022-02-16 14:20:43,756 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 200 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1805 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:43,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 643 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1008 Invalid, 0 Unknown, 1805 Unchecked, 0.3s Time] [2022-02-16 14:20:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-02-16 14:20:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 1943. [2022-02-16 14:20:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 1.83264675592173) internal successors, (3559), 1942 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3559 transitions. [2022-02-16 14:20:43,778 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3559 transitions. Word has length 41 [2022-02-16 14:20:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:43,778 INFO L470 AbstractCegarLoop]: Abstraction has 1943 states and 3559 transitions. [2022-02-16 14:20:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3559 transitions. [2022-02-16 14:20:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:43,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:43,781 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:43,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:43,996 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 [2022-02-16 14:20:43,997 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -187307664, now seen corresponding path program 24 times [2022-02-16 14:20:43,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:43,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649265225] [2022-02-16 14:20:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:43,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:44,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:44,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649265225] [2022-02-16 14:20:44,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649265225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:44,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122196786] [2022-02-16 14:20:44,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:20:44,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:44,310 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:44,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 14:20:44,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:20:44,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:44,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:44,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:44,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:44,982 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 38 treesize of output 48 [2022-02-16 14:20:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:45,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:45,360 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-02-16 14:20:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:45,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:46,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:46,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:46,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:46,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:46,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:46,587 INFO L353 Elim1Store]: treesize reduction 16, result has 78.1 percent of original size [2022-02-16 14:20:46,587 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 86 [2022-02-16 14:20:46,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:46,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122196786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:46,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:46,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 52 [2022-02-16 14:20:46,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26518746] [2022-02-16 14:20:46,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:46,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-16 14:20:46,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-16 14:20:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2327, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 14:20:46,980 INFO L87 Difference]: Start difference. First operand 1943 states and 3559 transitions. Second operand has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:49,489 INFO L93 Difference]: Finished difference Result 3697 states and 6490 transitions. [2022-02-16 14:20:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-16 14:20:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:49,494 INFO L225 Difference]: With dead ends: 3697 [2022-02-16 14:20:49,494 INFO L226 Difference]: Without dead ends: 3652 [2022-02-16 14:20:49,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1751, Invalid=8755, Unknown=0, NotChecked=0, Total=10506 [2022-02-16 14:20:49,495 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 239 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1561 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:49,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 416 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 489 Invalid, 0 Unknown, 1561 Unchecked, 0.2s Time] [2022-02-16 14:20:49,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2022-02-16 14:20:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 2263. [2022-02-16 14:20:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 1.8311229000884173) internal successors, (4142), 2262 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4142 transitions. [2022-02-16 14:20:49,522 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4142 transitions. Word has length 41 [2022-02-16 14:20:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:49,522 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 4142 transitions. [2022-02-16 14:20:49,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4142 transitions. [2022-02-16 14:20:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:49,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:49,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:49,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-16 14:20:49,740 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 [2022-02-16 14:20:49,740 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:49,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1054582392, now seen corresponding path program 25 times [2022-02-16 14:20:49,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:49,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404088189] [2022-02-16 14:20:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:49,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:50,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:50,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404088189] [2022-02-16 14:20:50,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404088189] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:50,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430705556] [2022-02-16 14:20:50,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:20:50,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:50,144 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:50,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 14:20:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:50,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:50,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:50,668 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 [2022-02-16 14:20:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:51,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:51,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:51,060 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 [2022-02-16 14:20:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:51,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:51,725 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:20:51,725 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 [2022-02-16 14:20:52,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-16 14:20:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:52,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430705556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:52,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:52,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 45 [2022-02-16 14:20:52,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243376314] [2022-02-16 14:20:52,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:52,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:20:52,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:52,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:20:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:20:52,517 INFO L87 Difference]: Start difference. First operand 2263 states and 4142 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:53,581 INFO L93 Difference]: Finished difference Result 4222 states and 7632 transitions. [2022-02-16 14:20:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 14:20:53,581 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-16 14:20:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:53,586 INFO L225 Difference]: With dead ends: 4222 [2022-02-16 14:20:53,586 INFO L226 Difference]: Without dead ends: 4195 [2022-02-16 14:20:53,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=619, Invalid=3803, Unknown=0, NotChecked=0, Total=4422 [2022-02-16 14:20:53,587 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 166 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:53,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 485 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 550 Invalid, 0 Unknown, 639 Unchecked, 0.2s Time] [2022-02-16 14:20:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-02-16 14:20:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2319. [2022-02-16 14:20:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 1.8321829163071612) internal successors, (4247), 2318 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 4247 transitions. [2022-02-16 14:20:53,614 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 4247 transitions. Word has length 41 [2022-02-16 14:20:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:53,614 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 4247 transitions. [2022-02-16 14:20:53,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 4247 transitions. [2022-02-16 14:20:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-16 14:20:53,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:53,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:53,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:53,819 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 [2022-02-16 14:20:53,820 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 14:20:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1068261026, now seen corresponding path program 26 times [2022-02-16 14:20:53,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:53,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596969848] [2022-02-16 14:20:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:53,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:20:54,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:54,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596969848] [2022-02-16 14:20:54,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596969848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:54,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879046991] [2022-02-16 14:20:54,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:20:54,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:54,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:54,207 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:20:54,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 14:20:54,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:20:54,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:20:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:54,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:54,988 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 [2022-02-16 14:20:55,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:55,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:20:55,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:55,413 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 [2022-02-16 14:20:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:55,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-02-16 14:33:23,250 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:33:23,266 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-16 14:33:23,268 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-16 14:33:23,270 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:33:23,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-16 14:33:23,479 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 [2022-02-16 14:33:23,479 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 59ms.. [2022-02-16 14:33:23,481 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-16 14:33:23,481 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-16 14:33:23,483 INFO L732 BasicCegarLoop]: Path program histogram: [26, 11, 1, 1] [2022-02-16 14:33:23,484 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 14:33:23,484 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 14:33:23,486 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:33:23 BasicIcfg [2022-02-16 14:33:23,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 14:33:23,486 INFO L158 Benchmark]: Toolchain (without parser) took 872852.45ms. Allocated memory was 251.7MB in the beginning and 4.7GB in the end (delta: 4.5GB). Free memory was 213.4MB in the beginning and 2.4GB in the end (delta: -2.2GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-02-16 14:33:23,486 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 251.7MB. Free memory is still 214.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 14:33:23,486 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.67ms. Allocated memory is still 251.7MB. Free memory was 213.3MB in the beginning and 211.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-16 14:33:23,486 INFO L158 Benchmark]: Boogie Preprocessor took 13.18ms. Allocated memory is still 251.7MB. Free memory was 211.8MB in the beginning and 210.8MB in the end (delta: 963.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 14:33:23,487 INFO L158 Benchmark]: RCFGBuilder took 242.09ms. Allocated memory is still 251.7MB. Free memory was 210.8MB in the beginning and 201.5MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-16 14:33:23,487 INFO L158 Benchmark]: TraceAbstraction took 872571.73ms. Allocated memory was 251.7MB in the beginning and 4.7GB in the end (delta: 4.5GB). Free memory was 201.0MB in the beginning and 2.4GB in the end (delta: -2.2GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-02-16 14:33:23,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 251.7MB. Free memory is still 214.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.67ms. Allocated memory is still 251.7MB. Free memory was 213.3MB in the beginning and 211.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.18ms. Allocated memory is still 251.7MB. Free memory was 211.8MB in the beginning and 210.8MB in the end (delta: 963.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 242.09ms. Allocated memory is still 251.7MB. Free memory was 210.8MB in the beginning and 201.5MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 872571.73ms. Allocated memory was 251.7MB in the beginning and 4.7GB in the end (delta: 4.5GB). Free memory was 201.0MB in the beginning and 2.4GB in the end (delta: -2.2GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 59ms.. - 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 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 59ms.. - 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 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 59ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 872.4s, OverallIterations: 39, TraceHistogramMax: 4, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.7s, AutomataDifference: 40.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, PartialOrderReductionTime: 4.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5282 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5282 mSDsluCounter, 10516 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 23345 IncrementalHoareTripleChecker+Unchecked, 11340 mSDsCounter, 1173 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12975 IncrementalHoareTripleChecker+Invalid, 37493 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1173 mSolverCounterUnsat, 1082 mSDtfsCounter, 12975 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4136 GetRequests, 1988 SyntacticMatches, 178 SemanticMatches, 1970 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 58145 ImplicationChecksByTransitivity, 51.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112297occurred in iteration=0, InterpolantAutomatonStates: 1437, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 38 MinimizatonAttempts, 95443 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 67.0s InterpolantComputationTime, 2625 NumberOfCodeBlocks, 2612 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 3721 ConstructedInterpolants, 816 QuantifiedInterpolants, 57941 SizeOfPredicates, 642 NumberOfNonLiveVariables, 2664 ConjunctsInSsa, 876 ConjunctsInUnsatCore, 106 InterpolantComputations, 5 PerfectInterpolantSequences, 363/2459 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