/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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:39:08,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:39:08,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:39:09,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 03:39:09,100 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 [2022-02-10 03:39:09,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:39:09,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:39:09,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:39:09,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:39:09,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:39:09,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:39:09,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:39:09,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:39:09,134 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:39:09,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:39:09,135 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:39:09,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:39:09,136 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:39:09,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:39:09,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:39:09,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:39:09,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:39:09,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:39:09,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:39:09,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:39:09,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:39:09,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:39:09,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:39:09,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:39:09,138 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:39:09,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:39:09,138 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:39:09,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:39:09,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:39:09,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:39:09,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:39:09,356 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:39:09,357 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:39:09,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2022-02-10 03:39:09,359 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2022-02-10 03:39:09,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:39:09,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:39:09,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:39:09,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:39:09,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:39:09,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,401 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:39:09,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:39:09,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:39:09,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:39:09,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:39:09,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:39:09,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:39:09,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:39:09,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:39:09,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/1) ... [2022-02-10 03:39:09,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:39:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:09,456 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) [2022-02-10 03:39:09,480 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 [2022-02-10 03:39:09,493 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:39:09,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:39:09,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:39:09,493 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:39:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:39:09,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:39:09,494 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:39:09,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:39:09,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:39:09,494 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:39:09,534 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:39:09,535 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:39:09,606 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:39:09,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:39:09,622 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 03:39:09,623 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:39:09 BoogieIcfgContainer [2022-02-10 03:39:09,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:39:09,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:39:09,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:39:09,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:39:09,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:09" (1/2) ... [2022-02-10 03:39:09,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c6c66c and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:39:09, skipping insertion in model container [2022-02-10 03:39:09,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:39:09" (2/2) ... [2022-02-10 03:39:09,634 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2022-02-10 03:39:09,638 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:39:09,638 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:39:09,638 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:39:09,638 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:39:09,682 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-10 03:39:09,714 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:39:09,720 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 [2022-02-10 03:39:09,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-10 03:39:09,728 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-02-10 03:39:09,745 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) [2022-02-10 03:39:13,958 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 223473 transitions and produced 112297 states. [2022-02-10 03:39:14,787 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) [2022-02-10 03:39:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:39:14,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:14,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:14,828 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:14,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1160028785, now seen corresponding path program 1 times [2022-02-10 03:39:14,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:14,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196762664] [2022-02-10 03:39:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:14,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:14,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:14,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196762664] [2022-02-10 03:39:14,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196762664] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:14,986 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:39:14,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:39:14,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638356471] [2022-02-10 03:39:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:14,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:39:14,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:39:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:39:15,682 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) [2022-02-10 03:39:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:18,406 INFO L93 Difference]: Finished difference Result 112033 states and 161023 transitions. [2022-02-10 03:39:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:39:18,409 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 [2022-02-10 03:39:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:18,829 INFO L225 Difference]: With dead ends: 112033 [2022-02-10 03:39:18,829 INFO L226 Difference]: Without dead ends: 78800 [2022-02-10 03:39:18,830 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 [2022-02-10 03:39:18,834 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:18,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:39:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78800 states. [2022-02-10 03:39:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78800 to 55. [2022-02-10 03:39:19,569 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) [2022-02-10 03:39:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2022-02-10 03:39:19,571 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 83 transitions. Word has length 14 [2022-02-10 03:39:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:19,572 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 83 transitions. [2022-02-10 03:39:19,572 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) [2022-02-10 03:39:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 83 transitions. [2022-02-10 03:39:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:39:19,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:19,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:19,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:39:19,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash -316006220, now seen corresponding path program 1 times [2022-02-10 03:39:19,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:19,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978670694] [2022-02-10 03:39:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:19,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:19,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:19,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978670694] [2022-02-10 03:39:19,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978670694] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:19,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:39:19,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:39:19,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209344321] [2022-02-10 03:39:19,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:19,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:39:19,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:19,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:39:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:39:19,658 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) [2022-02-10 03:39:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:19,789 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2022-02-10 03:39:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:39:19,789 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 [2022-02-10 03:39:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:19,790 INFO L225 Difference]: With dead ends: 67 [2022-02-10 03:39:19,790 INFO L226 Difference]: Without dead ends: 63 [2022-02-10 03:39:19,790 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 [2022-02-10 03:39:19,791 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 [2022-02-10 03:39:19,792 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] [2022-02-10 03:39:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-10 03:39:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-10 03:39:19,795 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) [2022-02-10 03:39:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 97 transitions. [2022-02-10 03:39:19,795 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 97 transitions. Word has length 18 [2022-02-10 03:39:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:19,796 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 97 transitions. [2022-02-10 03:39:19,796 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) [2022-02-10 03:39:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 97 transitions. [2022-02-10 03:39:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-10 03:39:19,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:19,796 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] [2022-02-10 03:39:19,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:39:19,797 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:19,797 INFO L85 PathProgramCache]: Analyzing trace with hash 151362758, now seen corresponding path program 1 times [2022-02-10 03:39:19,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:19,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65923542] [2022-02-10 03:39:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:19,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:19,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:19,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65923542] [2022-02-10 03:39:19,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65923542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:19,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720564705] [2022-02-10 03:39:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:19,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:19,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:19,973 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) [2022-02-10 03:39:19,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:39:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-10 03:39:20,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:20,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:39:20,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:39:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:20,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:20,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-10 03:39:20,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:20,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720564705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:20,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:20,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-02-10 03:39:20,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996235107] [2022-02-10 03:39:20,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:20,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:39:20,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:39:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:39:20,408 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) [2022-02-10 03:39:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:20,527 INFO L93 Difference]: Finished difference Result 125 states and 198 transitions. [2022-02-10 03:39:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:39:20,528 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 [2022-02-10 03:39:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:20,529 INFO L225 Difference]: With dead ends: 125 [2022-02-10 03:39:20,529 INFO L226 Difference]: Without dead ends: 115 [2022-02-10 03:39:20,529 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 [2022-02-10 03:39:20,530 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 [2022-02-10 03:39:20,530 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] [2022-02-10 03:39:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-10 03:39:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2022-02-10 03:39:20,534 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) [2022-02-10 03:39:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 141 transitions. [2022-02-10 03:39:20,535 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 141 transitions. Word has length 23 [2022-02-10 03:39:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:20,535 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 141 transitions. [2022-02-10 03:39:20,535 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) [2022-02-10 03:39:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 141 transitions. [2022-02-10 03:39:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:39:20,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:20,536 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] [2022-02-10 03:39:20,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:20,751 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 [2022-02-10 03:39:20,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2001999735, now seen corresponding path program 2 times [2022-02-10 03:39:20,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:20,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815925625] [2022-02-10 03:39:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:20,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:20,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:20,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815925625] [2022-02-10 03:39:20,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815925625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:20,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105449322] [2022-02-10 03:39:20,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:39:20,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:20,823 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) [2022-02-10 03:39:20,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:39:20,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:39:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-10 03:39:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:20,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:20,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105449322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:20,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:20,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-02-10 03:39:20,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821209468] [2022-02-10 03:39:20,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:20,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 03:39:20,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 03:39:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:39:20,994 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) [2022-02-10 03:39:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:21,067 INFO L93 Difference]: Finished difference Result 217 states and 311 transitions. [2022-02-10 03:39:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 03:39:21,068 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 [2022-02-10 03:39:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:21,068 INFO L225 Difference]: With dead ends: 217 [2022-02-10 03:39:21,068 INFO L226 Difference]: Without dead ends: 208 [2022-02-10 03:39:21,069 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 [2022-02-10 03:39:21,070 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:21,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 81 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:39:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-10 03:39:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 186. [2022-02-10 03:39:21,076 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) [2022-02-10 03:39:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2022-02-10 03:39:21,077 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 27 [2022-02-10 03:39:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:21,077 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2022-02-10 03:39:21,077 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) [2022-02-10 03:39:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2022-02-10 03:39:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:21,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:21,078 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] [2022-02-10 03:39:21,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:21,293 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 [2022-02-10 03:39:21,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1394991287, now seen corresponding path program 3 times [2022-02-10 03:39:21,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:21,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131506453] [2022-02-10 03:39:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:21,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:21,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:21,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131506453] [2022-02-10 03:39:21,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131506453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:21,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684174410] [2022-02-10 03:39:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:21,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:21,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:21,639 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) [2022-02-10 03:39:21,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:39:21,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:39:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:21,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:21,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-10 03:39:22,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:22,157 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 [2022-02-10 03:39:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:22,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:23,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:23,369 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 [2022-02-10 03:39:23,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:39:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:23,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684174410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:23,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:23,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-02-10 03:39:23,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989073412] [2022-02-10 03:39:23,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:23,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-10 03:39:23,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:23,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-10 03:39:23,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:39:23,471 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) [2022-02-10 03:39:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:24,402 INFO L93 Difference]: Finished difference Result 369 states and 563 transitions. [2022-02-10 03:39:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:39:24,402 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 [2022-02-10 03:39:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:24,403 INFO L225 Difference]: With dead ends: 369 [2022-02-10 03:39:24,403 INFO L226 Difference]: Without dead ends: 351 [2022-02-10 03:39:24,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=565, Invalid=2857, Unknown=0, NotChecked=0, Total=3422 [2022-02-10 03:39:24,405 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 142 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:39:24,405 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] [2022-02-10 03:39:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-10 03:39:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 244. [2022-02-10 03:39:24,412 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) [2022-02-10 03:39:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 386 transitions. [2022-02-10 03:39:24,413 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 386 transitions. Word has length 32 [2022-02-10 03:39:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:24,413 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 386 transitions. [2022-02-10 03:39:24,413 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) [2022-02-10 03:39:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 386 transitions. [2022-02-10 03:39:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:24,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:24,414 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] [2022-02-10 03:39:24,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:24,636 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 [2022-02-10 03:39:24,637 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:24,637 INFO L85 PathProgramCache]: Analyzing trace with hash 27455057, now seen corresponding path program 4 times [2022-02-10 03:39:24,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:24,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105309369] [2022-02-10 03:39:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:24,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:24,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:24,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105309369] [2022-02-10 03:39:24,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105309369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:24,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109211319] [2022-02-10 03:39:24,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:24,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:24,891 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) [2022-02-10 03:39:24,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:39:24,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:24,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:25,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:25,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-10 03:39:25,359 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-10 03:39:25,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-02-10 03:39:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:25,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:25,645 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:25,645 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 34 treesize of output 56 [2022-02-10 03:39:25,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:25,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109211319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:25,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:25,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-02-10 03:39:25,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792722950] [2022-02-10 03:39:25,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:25,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:39:25,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:25,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:39:25,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:39:25,874 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) [2022-02-10 03:39:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:26,360 INFO L93 Difference]: Finished difference Result 457 states and 707 transitions. [2022-02-10 03:39:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:39:26,360 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 [2022-02-10 03:39:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:26,361 INFO L225 Difference]: With dead ends: 457 [2022-02-10 03:39:26,362 INFO L226 Difference]: Without dead ends: 447 [2022-02-10 03:39:26,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:39:26,363 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 [2022-02-10 03:39:26,363 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] [2022-02-10 03:39:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-10 03:39:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 230. [2022-02-10 03:39:26,378 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) [2022-02-10 03:39:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 355 transitions. [2022-02-10 03:39:26,379 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 355 transitions. Word has length 32 [2022-02-10 03:39:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:26,379 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 355 transitions. [2022-02-10 03:39:26,379 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) [2022-02-10 03:39:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 355 transitions. [2022-02-10 03:39:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:26,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:26,383 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] [2022-02-10 03:39:26,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-10 03:39:26,584 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 [2022-02-10 03:39:26,584 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2096069043, now seen corresponding path program 5 times [2022-02-10 03:39:26,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:26,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660130941] [2022-02-10 03:39:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:26,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:39:26,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:26,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660130941] [2022-02-10 03:39:26,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660130941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:26,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128055098] [2022-02-10 03:39:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:26,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:26,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:26,833 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) [2022-02-10 03:39:26,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:39:26,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:39:26,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:26,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:26,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:27,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:27,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:27,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:27,358 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 [2022-02-10 03:39:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:27,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:27,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:27,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:27,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:27,751 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 [2022-02-10 03:39:27,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:28,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128055098] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:28,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:28,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-02-10 03:39:28,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638648958] [2022-02-10 03:39:28,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:28,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-10 03:39:28,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-10 03:39:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:39:28,046 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) [2022-02-10 03:39:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:28,439 INFO L93 Difference]: Finished difference Result 424 states and 660 transitions. [2022-02-10 03:39:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:39:28,440 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 [2022-02-10 03:39:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:28,441 INFO L225 Difference]: With dead ends: 424 [2022-02-10 03:39:28,442 INFO L226 Difference]: Without dead ends: 409 [2022-02-10 03:39:28,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:39:28,443 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 [2022-02-10 03:39:28,443 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] [2022-02-10 03:39:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-10 03:39:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 256. [2022-02-10 03:39:28,448 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) [2022-02-10 03:39:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 405 transitions. [2022-02-10 03:39:28,448 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 405 transitions. Word has length 32 [2022-02-10 03:39:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:28,448 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 405 transitions. [2022-02-10 03:39:28,449 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) [2022-02-10 03:39:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 405 transitions. [2022-02-10 03:39:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:28,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:28,449 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] [2022-02-10 03:39:28,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:28,671 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 [2022-02-10 03:39:28,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash -845481489, now seen corresponding path program 6 times [2022-02-10 03:39:28,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:28,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527052100] [2022-02-10 03:39:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:28,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:28,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:28,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527052100] [2022-02-10 03:39:28,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527052100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:28,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243033680] [2022-02-10 03:39:28,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:39:28,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:28,934 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) [2022-02-10 03:39:28,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:39:28,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:39:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:29,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:29,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-10 03:39:29,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:29,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:29,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:29,430 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 [2022-02-10 03:39:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:29,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:29,770 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:29,771 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 [2022-02-10 03:39:29,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:29,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243033680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:29,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:29,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-10 03:39:29,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316821656] [2022-02-10 03:39:29,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:29,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:39:29,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:39:29,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:39:29,913 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) [2022-02-10 03:39:30,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:30,236 INFO L93 Difference]: Finished difference Result 338 states and 516 transitions. [2022-02-10 03:39:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:39:30,237 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 [2022-02-10 03:39:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:30,237 INFO L225 Difference]: With dead ends: 338 [2022-02-10 03:39:30,237 INFO L226 Difference]: Without dead ends: 325 [2022-02-10 03:39:30,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:39:30,238 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 [2022-02-10 03:39:30,239 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] [2022-02-10 03:39:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-10 03:39:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 270. [2022-02-10 03:39:30,243 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) [2022-02-10 03:39:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 427 transitions. [2022-02-10 03:39:30,243 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 427 transitions. Word has length 32 [2022-02-10 03:39:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:30,243 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 427 transitions. [2022-02-10 03:39:30,244 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) [2022-02-10 03:39:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 427 transitions. [2022-02-10 03:39:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:30,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:30,245 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] [2022-02-10 03:39:30,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:30,460 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 [2022-02-10 03:39:30,461 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash 514741517, now seen corresponding path program 7 times [2022-02-10 03:39:30,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:30,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537861453] [2022-02-10 03:39:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:30,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:30,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:30,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537861453] [2022-02-10 03:39:30,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537861453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:30,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054627882] [2022-02-10 03:39:30,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:39:30,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:30,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:30,734 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) [2022-02-10 03:39:30,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:39:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:30,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:31,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:31,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-02-10 03:39:31,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:31,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:31,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:31,322 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 [2022-02-10 03:39:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:31,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:31,620 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:31,621 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 [2022-02-10 03:39:31,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:31,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054627882] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:31,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:31,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 27 [2022-02-10 03:39:31,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993892982] [2022-02-10 03:39:31,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:31,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:39:31,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:39:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:39:31,768 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) [2022-02-10 03:39:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:32,041 INFO L93 Difference]: Finished difference Result 408 states and 629 transitions. [2022-02-10 03:39:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:39:32,042 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 [2022-02-10 03:39:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:32,043 INFO L225 Difference]: With dead ends: 408 [2022-02-10 03:39:32,043 INFO L226 Difference]: Without dead ends: 391 [2022-02-10 03:39:32,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:39:32,044 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 [2022-02-10 03:39:32,044 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] [2022-02-10 03:39:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-10 03:39:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 285. [2022-02-10 03:39:32,051 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) [2022-02-10 03:39:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 454 transitions. [2022-02-10 03:39:32,051 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 454 transitions. Word has length 32 [2022-02-10 03:39:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:32,052 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 454 transitions. [2022-02-10 03:39:32,052 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) [2022-02-10 03:39:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 454 transitions. [2022-02-10 03:39:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:32,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:32,053 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] [2022-02-10 03:39:32,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:32,275 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 [2022-02-10 03:39:32,276 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -589360435, now seen corresponding path program 8 times [2022-02-10 03:39:32,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:32,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437078265] [2022-02-10 03:39:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:32,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:39:32,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:32,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437078265] [2022-02-10 03:39:32,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437078265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:32,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819803383] [2022-02-10 03:39:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:39:32,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:32,552 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) [2022-02-10 03:39:32,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:39:32,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:39:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:32,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:32,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:33,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:33,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:33,037 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 [2022-02-10 03:39:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:33,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:33,383 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:33,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-10 03:39:33,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:33,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819803383] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:33,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:33,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-10 03:39:33,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761687763] [2022-02-10 03:39:33,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:33,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:33,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:33,570 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) [2022-02-10 03:39:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:33,966 INFO L93 Difference]: Finished difference Result 501 states and 779 transitions. [2022-02-10 03:39:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:33,967 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 [2022-02-10 03:39:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:33,968 INFO L225 Difference]: With dead ends: 501 [2022-02-10 03:39:33,968 INFO L226 Difference]: Without dead ends: 455 [2022-02-10 03:39:33,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:39:33,969 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:33,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 271 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 234 Invalid, 0 Unknown, 485 Unchecked, 0.2s Time] [2022-02-10 03:39:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-10 03:39:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 302. [2022-02-10 03:39:33,973 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) [2022-02-10 03:39:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 477 transitions. [2022-02-10 03:39:33,974 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 477 transitions. Word has length 32 [2022-02-10 03:39:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:33,974 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 477 transitions. [2022-02-10 03:39:33,974 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) [2022-02-10 03:39:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 477 transitions. [2022-02-10 03:39:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:33,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:33,975 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] [2022-02-10 03:39:33,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:34,175 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 [2022-02-10 03:39:34,176 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1424352939, now seen corresponding path program 9 times [2022-02-10 03:39:34,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:34,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843603958] [2022-02-10 03:39:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:34,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:39:34,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:34,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843603958] [2022-02-10 03:39:34,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843603958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:34,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798901254] [2022-02-10 03:39:34,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:34,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:34,397 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) [2022-02-10 03:39:34,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:39:34,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:39:34,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:34,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:34,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:34,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:34,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:34,805 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 [2022-02-10 03:39:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:34,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:36,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:36,334 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 [2022-02-10 03:39:36,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:36,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798901254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:36,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:36,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 31 [2022-02-10 03:39:36,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587215109] [2022-02-10 03:39:36,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:36,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:39:36,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:39:36,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:39:36,418 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) [2022-02-10 03:39:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:36,760 INFO L93 Difference]: Finished difference Result 408 states and 627 transitions. [2022-02-10 03:39:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:36,760 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 [2022-02-10 03:39:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:36,761 INFO L225 Difference]: With dead ends: 408 [2022-02-10 03:39:36,761 INFO L226 Difference]: Without dead ends: 395 [2022-02-10 03:39:36,762 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 [2022-02-10 03:39:36,762 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 [2022-02-10 03:39:36,763 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] [2022-02-10 03:39:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-10 03:39:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 319. [2022-02-10 03:39:36,768 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) [2022-02-10 03:39:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 507 transitions. [2022-02-10 03:39:36,768 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 507 transitions. Word has length 32 [2022-02-10 03:39:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:36,769 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 507 transitions. [2022-02-10 03:39:36,769 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) [2022-02-10 03:39:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 507 transitions. [2022-02-10 03:39:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:36,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:36,770 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] [2022-02-10 03:39:36,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:36,983 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 [2022-02-10 03:39:36,983 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:36,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash -668885306, now seen corresponding path program 1 times [2022-02-10 03:39:36,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:36,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152002868] [2022-02-10 03:39:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:36,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:37,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:37,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152002868] [2022-02-10 03:39:37,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152002868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:37,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908764528] [2022-02-10 03:39:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:37,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:37,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:37,283 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) [2022-02-10 03:39:37,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:39:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:37,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:37,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-02-10 03:39:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:37,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:37,804 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 [2022-02-10 03:39:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:37,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:38,159 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:38,159 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 [2022-02-10 03:39:38,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:38,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908764528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:38,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:38,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-02-10 03:39:38,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717628897] [2022-02-10 03:39:38,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:38,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:38,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:38,291 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) [2022-02-10 03:39:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:38,526 INFO L93 Difference]: Finished difference Result 528 states and 829 transitions. [2022-02-10 03:39:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:39:38,526 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 [2022-02-10 03:39:38,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:38,528 INFO L225 Difference]: With dead ends: 528 [2022-02-10 03:39:38,528 INFO L226 Difference]: Without dead ends: 507 [2022-02-10 03:39:38,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:39:38,529 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 [2022-02-10 03:39:38,529 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] [2022-02-10 03:39:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-10 03:39:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 339. [2022-02-10 03:39:38,534 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) [2022-02-10 03:39:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 549 transitions. [2022-02-10 03:39:38,534 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 549 transitions. Word has length 35 [2022-02-10 03:39:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:38,534 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 549 transitions. [2022-02-10 03:39:38,535 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) [2022-02-10 03:39:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 549 transitions. [2022-02-10 03:39:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:38,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:38,540 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] [2022-02-10 03:39:38,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:38,759 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 [2022-02-10 03:39:38,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1267673798, now seen corresponding path program 2 times [2022-02-10 03:39:38,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:38,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729175424] [2022-02-10 03:39:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:38,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-10 03:39:38,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:38,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729175424] [2022-02-10 03:39:38,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729175424] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:38,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:39:38,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:39:38,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123343296] [2022-02-10 03:39:38,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:38,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:39:38,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:39:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:39:38,776 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) [2022-02-10 03:39:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:38,789 INFO L93 Difference]: Finished difference Result 334 states and 527 transitions. [2022-02-10 03:39:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:39:38,790 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 [2022-02-10 03:39:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:38,791 INFO L225 Difference]: With dead ends: 334 [2022-02-10 03:39:38,791 INFO L226 Difference]: Without dead ends: 334 [2022-02-10 03:39:38,791 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 [2022-02-10 03:39:38,791 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 [2022-02-10 03:39:38,791 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] [2022-02-10 03:39:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-10 03:39:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 292. [2022-02-10 03:39:38,795 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) [2022-02-10 03:39:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 479 transitions. [2022-02-10 03:39:38,796 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 479 transitions. Word has length 35 [2022-02-10 03:39:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:38,796 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 479 transitions. [2022-02-10 03:39:38,796 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) [2022-02-10 03:39:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 479 transitions. [2022-02-10 03:39:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:38,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:38,797 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] [2022-02-10 03:39:38,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-10 03:39:38,797 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1240514822, now seen corresponding path program 3 times [2022-02-10 03:39:38,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:38,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765726599] [2022-02-10 03:39:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:38,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:39,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:39,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765726599] [2022-02-10 03:39:39,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765726599] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:39,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740483592] [2022-02-10 03:39:39,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:39,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:39,045 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) [2022-02-10 03:39:39,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:39:39,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:39:39,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:39,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:39,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:39,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-10 03:39:39,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:39,409 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 [2022-02-10 03:39:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:39,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:40,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:40,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:40,854 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 [2022-02-10 03:39:40,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:41,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740483592] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:41,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:41,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-02-10 03:39:41,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236197269] [2022-02-10 03:39:41,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:41,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-10 03:39:41,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-10 03:39:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:39:41,013 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) [2022-02-10 03:39:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:41,626 INFO L93 Difference]: Finished difference Result 435 states and 680 transitions. [2022-02-10 03:39:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:39:41,627 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 [2022-02-10 03:39:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:41,628 INFO L225 Difference]: With dead ends: 435 [2022-02-10 03:39:41,628 INFO L226 Difference]: Without dead ends: 410 [2022-02-10 03:39:41,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:39:41,629 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 [2022-02-10 03:39:41,630 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] [2022-02-10 03:39:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-10 03:39:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 308. [2022-02-10 03:39:41,634 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) [2022-02-10 03:39:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 510 transitions. [2022-02-10 03:39:41,635 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 510 transitions. Word has length 35 [2022-02-10 03:39:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:41,635 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 510 transitions. [2022-02-10 03:39:41,635 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) [2022-02-10 03:39:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 510 transitions. [2022-02-10 03:39:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:41,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:41,636 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] [2022-02-10 03:39:41,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-10 03:39:41,851 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 [2022-02-10 03:39:41,851 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash 992621160, now seen corresponding path program 4 times [2022-02-10 03:39:41,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:41,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11545956] [2022-02-10 03:39:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:41,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:42,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:42,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11545956] [2022-02-10 03:39:42,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11545956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:42,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887723234] [2022-02-10 03:39:42,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:42,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:42,130 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) [2022-02-10 03:39:42,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:39:42,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:42,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:42,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-02-10 03:39:42,553 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-10 03:39:42,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-02-10 03:39:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:42,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:42,868 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:42,869 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 [2022-02-10 03:39:42,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:43,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887723234] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:43,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:43,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-02-10 03:39:43,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658769225] [2022-02-10 03:39:43,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:43,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:39:43,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:39:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:39:43,026 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) [2022-02-10 03:39:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:43,291 INFO L93 Difference]: Finished difference Result 554 states and 895 transitions. [2022-02-10 03:39:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:39:43,291 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 [2022-02-10 03:39:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:43,292 INFO L225 Difference]: With dead ends: 554 [2022-02-10 03:39:43,292 INFO L226 Difference]: Without dead ends: 548 [2022-02-10 03:39:43,293 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 [2022-02-10 03:39:43,293 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-10 03:39:43,293 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] [2022-02-10 03:39:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-02-10 03:39:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 303. [2022-02-10 03:39:43,299 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) [2022-02-10 03:39:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 499 transitions. [2022-02-10 03:39:43,300 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 499 transitions. Word has length 35 [2022-02-10 03:39:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:43,300 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 499 transitions. [2022-02-10 03:39:43,300 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) [2022-02-10 03:39:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 499 transitions. [2022-02-10 03:39:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:43,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:43,301 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] [2022-02-10 03:39:43,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-10 03:39:43,515 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 [2022-02-10 03:39:43,515 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1693698916, now seen corresponding path program 5 times [2022-02-10 03:39:43,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:43,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109749410] [2022-02-10 03:39:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:43,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:43,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:43,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109749410] [2022-02-10 03:39:43,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109749410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:43,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664339897] [2022-02-10 03:39:43,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:43,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:43,763 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) [2022-02-10 03:39:43,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:39:43,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:39:43,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:44,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:44,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:44,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:44,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:44,246 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 [2022-02-10 03:39:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:44,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:44,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:44,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:44,626 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 [2022-02-10 03:39:44,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:44,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664339897] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:44,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:44,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-02-10 03:39:44,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049795657] [2022-02-10 03:39:44,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:44,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-10 03:39:44,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-10 03:39:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:39:44,817 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) [2022-02-10 03:39:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:45,176 INFO L93 Difference]: Finished difference Result 463 states and 731 transitions. [2022-02-10 03:39:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:45,176 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 [2022-02-10 03:39:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:45,177 INFO L225 Difference]: With dead ends: 463 [2022-02-10 03:39:45,177 INFO L226 Difference]: Without dead ends: 452 [2022-02-10 03:39:45,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:39:45,178 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 [2022-02-10 03:39:45,178 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] [2022-02-10 03:39:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-10 03:39:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 292. [2022-02-10 03:39:45,181 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) [2022-02-10 03:39:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 477 transitions. [2022-02-10 03:39:45,182 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 477 transitions. Word has length 35 [2022-02-10 03:39:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:45,182 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 477 transitions. [2022-02-10 03:39:45,182 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) [2022-02-10 03:39:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 477 transitions. [2022-02-10 03:39:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:45,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:45,183 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] [2022-02-10 03:39:45,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-10 03:39:45,384 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 [2022-02-10 03:39:45,384 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1247851616, now seen corresponding path program 6 times [2022-02-10 03:39:45,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:45,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713930186] [2022-02-10 03:39:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:45,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:45,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:45,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713930186] [2022-02-10 03:39:45,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713930186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:45,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350027183] [2022-02-10 03:39:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:39:45,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:45,624 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) [2022-02-10 03:39:45,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:39:45,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:39:45,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:45,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:45,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:45,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:45,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2022-02-10 03:39:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:46,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:46,248 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 [2022-02-10 03:39:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:46,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:48,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:48,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:48,613 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 [2022-02-10 03:39:48,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:39:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:48,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350027183] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:48,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:48,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-02-10 03:39:48,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673923222] [2022-02-10 03:39:48,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:48,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-10 03:39:48,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-10 03:39:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:39:48,681 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) [2022-02-10 03:39:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:50,046 INFO L93 Difference]: Finished difference Result 832 states and 1298 transitions. [2022-02-10 03:39:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-10 03:39:50,046 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 [2022-02-10 03:39:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:50,048 INFO L225 Difference]: With dead ends: 832 [2022-02-10 03:39:50,048 INFO L226 Difference]: Without dead ends: 788 [2022-02-10 03:39:50,051 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 [2022-02-10 03:39:50,052 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 [2022-02-10 03:39:50,052 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] [2022-02-10 03:39:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-10 03:39:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 383. [2022-02-10 03:39:50,059 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) [2022-02-10 03:39:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 643 transitions. [2022-02-10 03:39:50,060 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 643 transitions. Word has length 35 [2022-02-10 03:39:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:50,060 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 643 transitions. [2022-02-10 03:39:50,060 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) [2022-02-10 03:39:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 643 transitions. [2022-02-10 03:39:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:50,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:50,061 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] [2022-02-10 03:39:50,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-10 03:39:50,261 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 [2022-02-10 03:39:50,261 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:50,262 INFO L85 PathProgramCache]: Analyzing trace with hash -991730562, now seen corresponding path program 7 times [2022-02-10 03:39:50,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:50,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059293063] [2022-02-10 03:39:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:50,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:50,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:50,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059293063] [2022-02-10 03:39:50,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059293063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:50,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864932186] [2022-02-10 03:39:50,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:39:50,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:50,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:50,477 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) [2022-02-10 03:39:50,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:39:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:50,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:50,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:50,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:50,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-02-10 03:39:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:50,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:50,929 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 [2022-02-10 03:39:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:50,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:51,276 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:51,277 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 [2022-02-10 03:39:51,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:51,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864932186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:51,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:51,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-10 03:39:51,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916049912] [2022-02-10 03:39:51,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:51,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:51,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:51,528 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) [2022-02-10 03:39:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:51,746 INFO L93 Difference]: Finished difference Result 545 states and 873 transitions. [2022-02-10 03:39:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:51,747 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 [2022-02-10 03:39:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:51,748 INFO L225 Difference]: With dead ends: 545 [2022-02-10 03:39:51,748 INFO L226 Difference]: Without dead ends: 529 [2022-02-10 03:39:51,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:39:51,749 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 [2022-02-10 03:39:51,749 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] [2022-02-10 03:39:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-02-10 03:39:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 406. [2022-02-10 03:39:51,755 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) [2022-02-10 03:39:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 680 transitions. [2022-02-10 03:39:51,756 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 680 transitions. Word has length 35 [2022-02-10 03:39:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:51,757 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 680 transitions. [2022-02-10 03:39:51,757 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) [2022-02-10 03:39:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 680 transitions. [2022-02-10 03:39:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:51,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:51,758 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] [2022-02-10 03:39:51,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:51,980 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 [2022-02-10 03:39:51,980 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:51,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1246249956, now seen corresponding path program 8 times [2022-02-10 03:39:51,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:51,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052164823] [2022-02-10 03:39:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:51,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:52,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:52,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052164823] [2022-02-10 03:39:52,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052164823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:52,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213063108] [2022-02-10 03:39:52,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:39:52,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:52,172 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) [2022-02-10 03:39:52,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:39:52,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:39:52,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:52,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:52,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:52,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:52,612 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 [2022-02-10 03:39:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:52,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:52,898 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:52,898 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 [2022-02-10 03:39:53,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:53,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213063108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:53,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:53,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 26 [2022-02-10 03:39:53,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127613913] [2022-02-10 03:39:53,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:53,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:39:53,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:39:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:39:53,043 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) [2022-02-10 03:39:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:53,226 INFO L93 Difference]: Finished difference Result 687 states and 1120 transitions. [2022-02-10 03:39:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:39:53,226 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 [2022-02-10 03:39:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:53,227 INFO L225 Difference]: With dead ends: 687 [2022-02-10 03:39:53,227 INFO L226 Difference]: Without dead ends: 676 [2022-02-10 03:39:53,228 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 [2022-02-10 03:39:53,228 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 [2022-02-10 03:39:53,228 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] [2022-02-10 03:39:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-10 03:39:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 405. [2022-02-10 03:39:53,233 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) [2022-02-10 03:39:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 678 transitions. [2022-02-10 03:39:53,234 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 678 transitions. Word has length 35 [2022-02-10 03:39:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:53,234 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 678 transitions. [2022-02-10 03:39:53,234 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) [2022-02-10 03:39:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 678 transitions. [2022-02-10 03:39:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:53,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:53,236 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] [2022-02-10 03:39:53,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:53,443 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 [2022-02-10 03:39:53,444 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash -260418554, now seen corresponding path program 9 times [2022-02-10 03:39:53,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:53,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281090887] [2022-02-10 03:39:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:53,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:53,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:53,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281090887] [2022-02-10 03:39:53,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281090887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:53,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450123296] [2022-02-10 03:39:53,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:53,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:53,687 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) [2022-02-10 03:39:53,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:39:53,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:39:53,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:39:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:54,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:54,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:54,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:54,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:54,154 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 [2022-02-10 03:39:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:54,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:54,455 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:54,456 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 [2022-02-10 03:39:54,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:39:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:54,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450123296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:54,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:54,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 27 [2022-02-10 03:39:54,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079469081] [2022-02-10 03:39:54,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:54,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:39:54,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:39:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:39:54,588 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) [2022-02-10 03:39:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:54,835 INFO L93 Difference]: Finished difference Result 719 states and 1174 transitions. [2022-02-10 03:39:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:39:54,835 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 [2022-02-10 03:39:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:54,836 INFO L225 Difference]: With dead ends: 719 [2022-02-10 03:39:54,836 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:39:54,837 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 [2022-02-10 03:39:54,837 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 [2022-02-10 03:39:54,837 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] [2022-02-10 03:39:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:39:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 405. [2022-02-10 03:39:54,843 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) [2022-02-10 03:39:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 678 transitions. [2022-02-10 03:39:54,844 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 678 transitions. Word has length 35 [2022-02-10 03:39:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:54,844 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 678 transitions. [2022-02-10 03:39:54,844 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) [2022-02-10 03:39:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 678 transitions. [2022-02-10 03:39:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-10 03:39:54,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:54,845 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] [2022-02-10 03:39:54,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:55,059 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 [2022-02-10 03:39:55,059 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2143892486, now seen corresponding path program 10 times [2022-02-10 03:39:55,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:55,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344458757] [2022-02-10 03:39:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:55,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:55,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:55,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344458757] [2022-02-10 03:39:55,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344458757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:55,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487024726] [2022-02-10 03:39:55,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:55,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:55,119 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) [2022-02-10 03:39:55,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:39:55,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:55,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:39:55,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:55,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:55,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487024726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:55,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:55,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-02-10 03:39:55,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445583161] [2022-02-10 03:39:55,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:55,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 03:39:55,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 03:39:55,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-10 03:39:55,280 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) [2022-02-10 03:39:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:55,325 INFO L93 Difference]: Finished difference Result 644 states and 1056 transitions. [2022-02-10 03:39:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-10 03:39:55,325 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 [2022-02-10 03:39:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:55,326 INFO L225 Difference]: With dead ends: 644 [2022-02-10 03:39:55,326 INFO L226 Difference]: Without dead ends: 630 [2022-02-10 03:39:55,326 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 [2022-02-10 03:39:55,327 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 [2022-02-10 03:39:55,327 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] [2022-02-10 03:39:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-10 03:39:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 546. [2022-02-10 03:39:55,334 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) [2022-02-10 03:39:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 918 transitions. [2022-02-10 03:39:55,335 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 918 transitions. Word has length 36 [2022-02-10 03:39:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 918 transitions. [2022-02-10 03:39:55,335 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) [2022-02-10 03:39:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 918 transitions. [2022-02-10 03:39:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:39:55,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:55,337 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] [2022-02-10 03:39:55,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:55,547 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 [2022-02-10 03:39:55,547 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash -669493733, now seen corresponding path program 11 times [2022-02-10 03:39:55,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:55,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423567811] [2022-02-10 03:39:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:55,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-10 03:39:55,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:55,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423567811] [2022-02-10 03:39:55,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423567811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:55,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54317586] [2022-02-10 03:39:55,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:55,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:55,587 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) [2022-02-10 03:39:55,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:39:55,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:39:55,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:55,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:39:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-10 03:39:55,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-10 03:39:55,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54317586] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:55,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-10 03:39:55,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-02-10 03:39:55,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552142370] [2022-02-10 03:39:55,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:55,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:39:55,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:39:55,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:39:55,664 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) [2022-02-10 03:39:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:55,677 INFO L93 Difference]: Finished difference Result 633 states and 1038 transitions. [2022-02-10 03:39:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:39:55,677 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 [2022-02-10 03:39:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:55,678 INFO L225 Difference]: With dead ends: 633 [2022-02-10 03:39:55,678 INFO L226 Difference]: Without dead ends: 633 [2022-02-10 03:39:55,678 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 [2022-02-10 03:39:55,678 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 [2022-02-10 03:39:55,679 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] [2022-02-10 03:39:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-10 03:39:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 373. [2022-02-10 03:39:55,684 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) [2022-02-10 03:39:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 594 transitions. [2022-02-10 03:39:55,685 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 594 transitions. Word has length 37 [2022-02-10 03:39:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:55,685 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 594 transitions. [2022-02-10 03:39:55,685 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) [2022-02-10 03:39:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 594 transitions. [2022-02-10 03:39:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-10 03:39:55,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:55,686 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] [2022-02-10 03:39:55,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:55,899 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 [2022-02-10 03:39:55,899 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1204040643, now seen corresponding path program 10 times [2022-02-10 03:39:55,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:55,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542204431] [2022-02-10 03:39:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:55,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:56,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:56,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542204431] [2022-02-10 03:39:56,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542204431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:56,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316488207] [2022-02-10 03:39:56,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:56,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:56,143 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) [2022-02-10 03:39:56,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:39:56,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:56,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:56,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:56,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-02-10 03:39:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:56,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:56,680 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 [2022-02-10 03:39:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:56,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:57,075 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:57,075 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 [2022-02-10 03:39:57,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:57,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316488207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:57,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:57,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-10 03:39:57,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927290443] [2022-02-10 03:39:57,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:57,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:57,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:57,267 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) [2022-02-10 03:39:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:57,506 INFO L93 Difference]: Finished difference Result 644 states and 1021 transitions. [2022-02-10 03:39:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:39:57,506 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 [2022-02-10 03:39:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:57,507 INFO L225 Difference]: With dead ends: 644 [2022-02-10 03:39:57,507 INFO L226 Difference]: Without dead ends: 631 [2022-02-10 03:39:57,508 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 [2022-02-10 03:39:57,508 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 [2022-02-10 03:39:57,509 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] [2022-02-10 03:39:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-10 03:39:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 377. [2022-02-10 03:39:57,514 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) [2022-02-10 03:39:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 604 transitions. [2022-02-10 03:39:57,515 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 604 transitions. Word has length 38 [2022-02-10 03:39:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:57,515 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 604 transitions. [2022-02-10 03:39:57,515 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) [2022-02-10 03:39:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 604 transitions. [2022-02-10 03:39:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-10 03:39:57,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:57,516 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] [2022-02-10 03:39:57,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:57,738 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 [2022-02-10 03:39:57,738 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash -24260186, now seen corresponding path program 11 times [2022-02-10 03:39:57,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:57,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392205622] [2022-02-10 03:39:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:57,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-10 03:39:57,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:57,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392205622] [2022-02-10 03:39:57,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392205622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:57,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024917127] [2022-02-10 03:39:57,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:57,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:57,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:57,775 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) [2022-02-10 03:39:57,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:39:57,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:39:57,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:57,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:39:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-10 03:39:57,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-10 03:39:57,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024917127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:57,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-10 03:39:57,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-02-10 03:39:57,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921748851] [2022-02-10 03:39:57,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:57,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:39:57,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:39:57,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:39:57,879 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) [2022-02-10 03:39:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:57,898 INFO L93 Difference]: Finished difference Result 455 states and 710 transitions. [2022-02-10 03:39:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:39:57,898 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 [2022-02-10 03:39:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:57,899 INFO L225 Difference]: With dead ends: 455 [2022-02-10 03:39:57,899 INFO L226 Difference]: Without dead ends: 455 [2022-02-10 03:39:57,899 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 [2022-02-10 03:39:57,900 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 [2022-02-10 03:39:57,900 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] [2022-02-10 03:39:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-10 03:39:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 301. [2022-02-10 03:39:57,904 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) [2022-02-10 03:39:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 453 transitions. [2022-02-10 03:39:57,905 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 453 transitions. Word has length 40 [2022-02-10 03:39:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:57,905 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 453 transitions. [2022-02-10 03:39:57,905 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) [2022-02-10 03:39:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 453 transitions. [2022-02-10 03:39:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:39:57,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:57,906 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] [2022-02-10 03:39:57,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:58,115 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 [2022-02-10 03:39:58,115 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2024155020, now seen corresponding path program 12 times [2022-02-10 03:39:58,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:58,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126407315] [2022-02-10 03:39:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:58,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:58,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:58,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126407315] [2022-02-10 03:39:58,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126407315] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:58,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018176267] [2022-02-10 03:39:58,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:39:58,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:58,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:58,576 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) [2022-02-10 03:39:58,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:39:58,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:39:58,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:39:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:59,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:59,124 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 [2022-02-10 03:39:59,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:59,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:59,834 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 [2022-02-10 03:40:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:00,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:03,803 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-10 03:40:03,803 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 [2022-02-10 03:40:04,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:04,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018176267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:04,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:04,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-10 03:40:04,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280717512] [2022-02-10 03:40:04,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:04,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-10 03:40:04,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-10 03:40:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:40:04,189 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) [2022-02-10 03:40:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:05,644 INFO L93 Difference]: Finished difference Result 553 states and 821 transitions. [2022-02-10 03:40:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-10 03:40:05,645 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 [2022-02-10 03:40:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:05,646 INFO L225 Difference]: With dead ends: 553 [2022-02-10 03:40:05,646 INFO L226 Difference]: Without dead ends: 547 [2022-02-10 03:40:05,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2425 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=940, Invalid=5866, Unknown=0, NotChecked=0, Total=6806 [2022-02-10 03:40:05,648 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 [2022-02-10 03:40:05,648 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] [2022-02-10 03:40:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-02-10 03:40:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 359. [2022-02-10 03:40:05,653 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) [2022-02-10 03:40:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 559 transitions. [2022-02-10 03:40:05,654 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 559 transitions. Word has length 41 [2022-02-10 03:40:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 559 transitions. [2022-02-10 03:40:05,654 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) [2022-02-10 03:40:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 559 transitions. [2022-02-10 03:40:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:05,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:05,655 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] [2022-02-10 03:40:05,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:05,856 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 [2022-02-10 03:40:05,856 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1695529784, now seen corresponding path program 13 times [2022-02-10 03:40:05,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:05,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216899130] [2022-02-10 03:40:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:05,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:06,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:06,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216899130] [2022-02-10 03:40:06,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216899130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:06,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26763062] [2022-02-10 03:40:06,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:40:06,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:06,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:06,299 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) [2022-02-10 03:40:06,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:40:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:06,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:06,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:06,712 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 [2022-02-10 03:40:07,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:07,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:07,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:07,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:07,156 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 [2022-02-10 03:40:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:07,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:07,860 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:07,860 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 [2022-02-10 03:40:08,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:08,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26763062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:08,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:08,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 48 [2022-02-10 03:40:08,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332024597] [2022-02-10 03:40:08,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:08,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-10 03:40:08,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-10 03:40:08,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:40:08,408 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) [2022-02-10 03:40:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:09,220 INFO L93 Difference]: Finished difference Result 907 states and 1387 transitions. [2022-02-10 03:40:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:40:09,221 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 [2022-02-10 03:40:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:09,222 INFO L225 Difference]: With dead ends: 907 [2022-02-10 03:40:09,222 INFO L226 Difference]: Without dead ends: 901 [2022-02-10 03:40:09,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=458, Invalid=3324, Unknown=0, NotChecked=0, Total=3782 [2022-02-10 03:40:09,223 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 [2022-02-10 03:40:09,224 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] [2022-02-10 03:40:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-02-10 03:40:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 421. [2022-02-10 03:40:09,230 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) [2022-02-10 03:40:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 660 transitions. [2022-02-10 03:40:09,231 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 660 transitions. Word has length 41 [2022-02-10 03:40:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:09,231 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 660 transitions. [2022-02-10 03:40:09,231 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) [2022-02-10 03:40:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 660 transitions. [2022-02-10 03:40:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:09,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:09,232 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] [2022-02-10 03:40:09,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-10 03:40:09,447 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 [2022-02-10 03:40:09,447 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1638593966, now seen corresponding path program 14 times [2022-02-10 03:40:09,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:09,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291091331] [2022-02-10 03:40:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:09,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:09,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:09,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291091331] [2022-02-10 03:40:09,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291091331] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:09,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765095015] [2022-02-10 03:40:09,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:40:09,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:09,872 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) [2022-02-10 03:40:09,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:40:09,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:40:09,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:09,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:40:09,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:10,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:10,387 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 [2022-02-10 03:40:10,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:10,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:10,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:10,931 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 [2022-02-10 03:40:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:11,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:14,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:14,716 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-10 03:40:14,716 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 [2022-02-10 03:40:15,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:40:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:15,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765095015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:15,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:15,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-10 03:40:15,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974711719] [2022-02-10 03:40:15,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:15,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-10 03:40:15,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:15,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-10 03:40:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:40:15,248 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) [2022-02-10 03:40:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:18,120 INFO L93 Difference]: Finished difference Result 935 states and 1389 transitions. [2022-02-10 03:40:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:40:18,121 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 [2022-02-10 03:40:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:18,122 INFO L225 Difference]: With dead ends: 935 [2022-02-10 03:40:18,122 INFO L226 Difference]: Without dead ends: 929 [2022-02-10 03:40:18,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1182, Invalid=7374, Unknown=0, NotChecked=0, Total=8556 [2022-02-10 03:40:18,123 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 [2022-02-10 03:40:18,123 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] [2022-02-10 03:40:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-02-10 03:40:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 448. [2022-02-10 03:40:18,129 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) [2022-02-10 03:40:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 707 transitions. [2022-02-10 03:40:18,130 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 707 transitions. Word has length 41 [2022-02-10 03:40:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:18,130 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 707 transitions. [2022-02-10 03:40:18,130 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) [2022-02-10 03:40:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 707 transitions. [2022-02-10 03:40:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:18,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:18,131 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] [2022-02-10 03:40:18,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-10 03:40:18,345 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 [2022-02-10 03:40:18,345 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -437002066, now seen corresponding path program 15 times [2022-02-10 03:40:18,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:18,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140579336] [2022-02-10 03:40:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:18,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:18,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:18,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140579336] [2022-02-10 03:40:18,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140579336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:18,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893839406] [2022-02-10 03:40:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:40:18,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:18,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:18,890 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) [2022-02-10 03:40:18,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:40:18,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:40:18,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-10 03:40:18,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:19,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:19,432 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 [2022-02-10 03:40:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:19,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:19,898 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 [2022-02-10 03:40:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:20,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:21,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:21,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:21,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:21,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:21,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:21,214 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 [2022-02-10 03:40:21,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:21,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893839406] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:21,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:21,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-10 03:40:21,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242383698] [2022-02-10 03:40:21,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:21,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-10 03:40:21,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-10 03:40:21,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2385, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:40:21,383 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) [2022-02-10 03:40:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:27,741 INFO L93 Difference]: Finished difference Result 1989 states and 3065 transitions. [2022-02-10 03:40:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-10 03:40:27,742 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 [2022-02-10 03:40:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:27,744 INFO L225 Difference]: With dead ends: 1989 [2022-02-10 03:40:27,744 INFO L226 Difference]: Without dead ends: 1959 [2022-02-10 03:40:27,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 61 SyntacticMatches, 15 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2864, Invalid=17158, Unknown=0, NotChecked=0, Total=20022 [2022-02-10 03:40:27,747 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 504 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:27,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1036 Invalid, 3410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1224 Invalid, 0 Unknown, 2007 Unchecked, 0.7s Time] [2022-02-10 03:40:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-02-10 03:40:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 594. [2022-02-10 03:40:27,761 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) [2022-02-10 03:40:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 995 transitions. [2022-02-10 03:40:27,762 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 995 transitions. Word has length 41 [2022-02-10 03:40:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:27,762 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 995 transitions. [2022-02-10 03:40:27,762 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) [2022-02-10 03:40:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 995 transitions. [2022-02-10 03:40:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:27,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:27,763 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] [2022-02-10 03:40:27,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:27,979 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 [2022-02-10 03:40:27,979 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:27,980 INFO L85 PathProgramCache]: Analyzing trace with hash 29549192, now seen corresponding path program 16 times [2022-02-10 03:40:27,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:27,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119228292] [2022-02-10 03:40:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:27,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:40:28,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:28,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119228292] [2022-02-10 03:40:28,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119228292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:28,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323828878] [2022-02-10 03:40:28,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:40:28,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:28,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:28,436 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) [2022-02-10 03:40:28,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:40:28,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:40:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:29,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:29,105 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 [2022-02-10 03:40:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:29,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:29,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-02-10 03:40:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:29,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:30,091 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:30,091 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 [2022-02-10 03:40:30,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:30,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323828878] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:30,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:30,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-02-10 03:40:30,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590427393] [2022-02-10 03:40:30,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:30,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:40:30,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:40:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:40:30,531 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) [2022-02-10 03:40:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:32,095 INFO L93 Difference]: Finished difference Result 1300 states and 2068 transitions. [2022-02-10 03:40:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:40:32,096 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 [2022-02-10 03:40:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:32,097 INFO L225 Difference]: With dead ends: 1300 [2022-02-10 03:40:32,097 INFO L226 Difference]: Without dead ends: 1277 [2022-02-10 03:40:32,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=854, Invalid=5626, Unknown=0, NotChecked=0, Total=6480 [2022-02-10 03:40:32,099 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 [2022-02-10 03:40:32,099 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] [2022-02-10 03:40:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-02-10 03:40:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 687. [2022-02-10 03:40:32,109 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) [2022-02-10 03:40:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1187 transitions. [2022-02-10 03:40:32,110 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1187 transitions. Word has length 41 [2022-02-10 03:40:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:32,111 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1187 transitions. [2022-02-10 03:40:32,111 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) [2022-02-10 03:40:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1187 transitions. [2022-02-10 03:40:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:32,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:32,112 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] [2022-02-10 03:40:32,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:32,334 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 [2022-02-10 03:40:32,334 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2117463714, now seen corresponding path program 17 times [2022-02-10 03:40:32,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:32,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883446604] [2022-02-10 03:40:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:32,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:40:32,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:32,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883446604] [2022-02-10 03:40:32,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883446604] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:32,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773015687] [2022-02-10 03:40:32,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:40:32,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:32,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:32,768 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) [2022-02-10 03:40:32,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:40:32,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:40:32,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:32,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:32,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:33,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:33,486 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 [2022-02-10 03:40:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:33,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:33,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:33,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:33,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:33,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:33,793 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 [2022-02-10 03:40:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:33,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:34,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:34,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:34,736 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 [2022-02-10 03:40:34,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:35,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773015687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:35,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:35,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 52 [2022-02-10 03:40:35,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623031014] [2022-02-10 03:40:35,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:35,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-10 03:40:35,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-10 03:40:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:40:35,133 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) [2022-02-10 03:40:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:37,979 INFO L93 Difference]: Finished difference Result 1556 states and 2567 transitions. [2022-02-10 03:40:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-10 03:40:37,979 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 [2022-02-10 03:40:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:37,981 INFO L225 Difference]: With dead ends: 1556 [2022-02-10 03:40:37,981 INFO L226 Difference]: Without dead ends: 1530 [2022-02-10 03:40:37,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1828, Invalid=8072, Unknown=0, NotChecked=0, Total=9900 [2022-02-10 03:40:37,985 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:37,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 357 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 508 Invalid, 0 Unknown, 1148 Unchecked, 0.3s Time] [2022-02-10 03:40:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-02-10 03:40:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 872. [2022-02-10 03:40:37,996 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) [2022-02-10 03:40:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1584 transitions. [2022-02-10 03:40:37,997 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1584 transitions. Word has length 41 [2022-02-10 03:40:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1584 transitions. [2022-02-10 03:40:37,998 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) [2022-02-10 03:40:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1584 transitions. [2022-02-10 03:40:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:37,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:37,999 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] [2022-02-10 03:40:38,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-10 03:40:38,216 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 [2022-02-10 03:40:38,216 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash 674712674, now seen corresponding path program 18 times [2022-02-10 03:40:38,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:38,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111364891] [2022-02-10 03:40:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:38,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:40:38,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:38,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111364891] [2022-02-10 03:40:38,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111364891] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:38,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770928326] [2022-02-10 03:40:38,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:40:38,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:38,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:38,789 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) [2022-02-10 03:40:38,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:40:38,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:40:38,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-10 03:40:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:39,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:39,742 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 [2022-02-10 03:40:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:39,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:39,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:39,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:39,866 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 [2022-02-10 03:40:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:39,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:40,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:40,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:40,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:40,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:41,026 INFO L353 Elim1Store]: treesize reduction 16, result has 78.1 percent of original size [2022-02-10 03:40:41,026 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 [2022-02-10 03:40:41,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:41,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770928326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:41,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:41,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 51 [2022-02-10 03:40:41,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122459811] [2022-02-10 03:40:41,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:41,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-10 03:40:41,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:41,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-10 03:40:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:40:41,440 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) [2022-02-10 03:40:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:45,903 INFO L93 Difference]: Finished difference Result 2214 states and 3794 transitions. [2022-02-10 03:40:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-10 03:40:45,903 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 [2022-02-10 03:40:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:45,910 INFO L225 Difference]: With dead ends: 2214 [2022-02-10 03:40:45,910 INFO L226 Difference]: Without dead ends: 2189 [2022-02-10 03:40:45,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 13 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5998 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2249, Invalid=13753, Unknown=0, NotChecked=0, Total=16002 [2022-02-10 03:40:45,914 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 [2022-02-10 03:40:45,914 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] [2022-02-10 03:40:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-02-10 03:40:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1069. [2022-02-10 03:40:45,931 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) [2022-02-10 03:40:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1982 transitions. [2022-02-10 03:40:45,933 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1982 transitions. Word has length 41 [2022-02-10 03:40:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:45,933 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1982 transitions. [2022-02-10 03:40:45,934 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) [2022-02-10 03:40:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1982 transitions. [2022-02-10 03:40:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:45,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:45,936 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] [2022-02-10 03:40:45,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:46,149 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 [2022-02-10 03:40:46,150 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash -906614852, now seen corresponding path program 19 times [2022-02-10 03:40:46,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:46,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015596162] [2022-02-10 03:40:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:46,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:46,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:46,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015596162] [2022-02-10 03:40:46,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015596162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:46,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486902476] [2022-02-10 03:40:46,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:40:46,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:46,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:46,572 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) [2022-02-10 03:40:46,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:40:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:47,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:47,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-02-10 03:40:47,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:47,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:47,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:47,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:47,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:47,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:47,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:47,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:47,634 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 [2022-02-10 03:40:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:47,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:48,361 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:48,362 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 [2022-02-10 03:40:48,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:48,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486902476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:48,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:48,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 45 [2022-02-10 03:40:48,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504192605] [2022-02-10 03:40:48,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:48,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:40:48,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:48,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:40:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:40:48,854 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) [2022-02-10 03:40:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:50,102 INFO L93 Difference]: Finished difference Result 1865 states and 3290 transitions. [2022-02-10 03:40:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-10 03:40:50,102 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 [2022-02-10 03:40:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:50,105 INFO L225 Difference]: With dead ends: 1865 [2022-02-10 03:40:50,106 INFO L226 Difference]: Without dead ends: 1848 [2022-02-10 03:40:50,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=841, Invalid=5011, Unknown=0, NotChecked=0, Total=5852 [2022-02-10 03:40:50,107 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 140 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:50,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 268 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 479 Invalid, 0 Unknown, 1137 Unchecked, 0.2s Time] [2022-02-10 03:40:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-02-10 03:40:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1483. [2022-02-10 03:40:50,125 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) [2022-02-10 03:40:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 2771 transitions. [2022-02-10 03:40:50,127 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 2771 transitions. Word has length 41 [2022-02-10 03:40:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:50,128 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 2771 transitions. [2022-02-10 03:40:50,128 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) [2022-02-10 03:40:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 2771 transitions. [2022-02-10 03:40:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:50,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:50,131 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] [2022-02-10 03:40:50,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:50,351 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 [2022-02-10 03:40:50,351 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:50,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1440563780, now seen corresponding path program 20 times [2022-02-10 03:40:50,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:50,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693694842] [2022-02-10 03:40:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:50,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:50,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:50,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693694842] [2022-02-10 03:40:50,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693694842] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:50,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635139002] [2022-02-10 03:40:50,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:40:50,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:50,852 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) [2022-02-10 03:40:50,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:40:50,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:40:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:51,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:51,666 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 [2022-02-10 03:40:51,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:51,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:51,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:51,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:51,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:51,902 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 [2022-02-10 03:40:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:51,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:52,696 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:52,697 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 [2022-02-10 03:40:53,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:53,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635139002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:53,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:53,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 45 [2022-02-10 03:40:53,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307958771] [2022-02-10 03:40:53,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:53,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:40:53,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:40:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:40:53,224 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) [2022-02-10 03:40:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:56,538 INFO L93 Difference]: Finished difference Result 3169 states and 5681 transitions. [2022-02-10 03:40:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-10 03:40:56,538 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 [2022-02-10 03:40:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:56,542 INFO L225 Difference]: With dead ends: 3169 [2022-02-10 03:40:56,542 INFO L226 Difference]: Without dead ends: 3138 [2022-02-10 03:40:56,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 69 SyntacticMatches, 21 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1846, Invalid=10586, Unknown=0, NotChecked=0, Total=12432 [2022-02-10 03:40:56,544 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 237 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:56,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 311 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 836 Invalid, 0 Unknown, 1972 Unchecked, 0.4s Time] [2022-02-10 03:40:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-02-10 03:40:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1938. [2022-02-10 03:40:56,573 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) [2022-02-10 03:40:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 3594 transitions. [2022-02-10 03:40:56,576 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 3594 transitions. Word has length 41 [2022-02-10 03:40:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:56,576 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 3594 transitions. [2022-02-10 03:40:56,576 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) [2022-02-10 03:40:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 3594 transitions. [2022-02-10 03:40:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:56,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:56,580 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] [2022-02-10 03:40:56,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:56,802 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 [2022-02-10 03:40:56,802 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash 335275204, now seen corresponding path program 21 times [2022-02-10 03:40:56,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:56,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774978732] [2022-02-10 03:40:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:56,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:57,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:57,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774978732] [2022-02-10 03:40:57,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774978732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:57,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904527186] [2022-02-10 03:40:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:40:57,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:57,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:57,418 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) [2022-02-10 03:40:57,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:40:57,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:40:57,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:57,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:40:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:57,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:57,867 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 [2022-02-10 03:40:58,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:58,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:58,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:58,215 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 [2022-02-10 03:40:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:58,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:00,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:00,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:00,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:00,908 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 [2022-02-10 03:41:01,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:01,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904527186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:01,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:01,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 54 [2022-02-10 03:41:01,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397604787] [2022-02-10 03:41:01,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:01,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-10 03:41:01,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-10 03:41:01,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2533, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:41:01,227 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) [2022-02-10 03:41:05,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:05,601 INFO L93 Difference]: Finished difference Result 2690 states and 4682 transitions. [2022-02-10 03:41:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-10 03:41:05,601 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 [2022-02-10 03:41:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:05,604 INFO L225 Difference]: With dead ends: 2690 [2022-02-10 03:41:05,604 INFO L226 Difference]: Without dead ends: 2658 [2022-02-10 03:41:05,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4946 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2083, Invalid=12197, Unknown=0, NotChecked=0, Total=14280 [2022-02-10 03:41:05,606 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 [2022-02-10 03:41:05,606 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] [2022-02-10 03:41:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2022-02-10 03:41:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2016. [2022-02-10 03:41:05,625 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) [2022-02-10 03:41:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3743 transitions. [2022-02-10 03:41:05,628 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3743 transitions. Word has length 41 [2022-02-10 03:41:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3743 transitions. [2022-02-10 03:41:05,628 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) [2022-02-10 03:41:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3743 transitions. [2022-02-10 03:41:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:05,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:05,633 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] [2022-02-10 03:41:05,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-10 03:41:05,847 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 [2022-02-10 03:41:05,847 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash 282305122, now seen corresponding path program 22 times [2022-02-10 03:41:05,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:05,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112104681] [2022-02-10 03:41:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:05,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:06,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:06,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112104681] [2022-02-10 03:41:06,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112104681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:06,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813227306] [2022-02-10 03:41:06,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:41:06,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:06,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:06,328 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) [2022-02-10 03:41:06,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:41:06,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:41:06,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:41:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:06,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:06,809 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 [2022-02-10 03:41:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:07,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:07,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:07,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:07,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:07,284 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 [2022-02-10 03:41:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:07,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:08,052 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:41:08,052 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 [2022-02-10 03:41:08,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-10 03:41:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:08,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813227306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:08,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:08,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 48 [2022-02-10 03:41:08,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406532191] [2022-02-10 03:41:08,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:08,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-10 03:41:08,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-10 03:41:08,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:41:08,932 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) [2022-02-10 03:41:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:09,839 INFO L93 Difference]: Finished difference Result 3332 states and 6062 transitions. [2022-02-10 03:41:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 03:41:09,843 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 [2022-02-10 03:41:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:09,848 INFO L225 Difference]: With dead ends: 3332 [2022-02-10 03:41:09,848 INFO L226 Difference]: Without dead ends: 3326 [2022-02-10 03:41:09,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=495, Invalid=3537, Unknown=0, NotChecked=0, Total=4032 [2022-02-10 03:41:09,849 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 [2022-02-10 03:41:09,849 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] [2022-02-10 03:41:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2022-02-10 03:41:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2028. [2022-02-10 03:41:09,876 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) [2022-02-10 03:41:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 3758 transitions. [2022-02-10 03:41:09,880 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 3758 transitions. Word has length 41 [2022-02-10 03:41:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:09,880 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 3758 transitions. [2022-02-10 03:41:09,880 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) [2022-02-10 03:41:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 3758 transitions. [2022-02-10 03:41:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:09,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:09,884 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] [2022-02-10 03:41:09,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 03:41:10,103 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 [2022-02-10 03:41:10,103 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 748856380, now seen corresponding path program 23 times [2022-02-10 03:41:10,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:10,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689195903] [2022-02-10 03:41:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:10,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:41:10,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:10,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689195903] [2022-02-10 03:41:10,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689195903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:10,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235297363] [2022-02-10 03:41:10,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:41:10,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:10,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:10,674 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) [2022-02-10 03:41:10,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:41:10,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:41:10,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-10 03:41:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:11,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:11,434 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 [2022-02-10 03:41:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:11,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:11,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:11,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:11,731 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 [2022-02-10 03:41:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:11,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:12,503 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:41:12,503 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 [2022-02-10 03:41:12,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:12,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235297363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:12,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:12,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-02-10 03:41:12,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694261193] [2022-02-10 03:41:12,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:12,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:41:12,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:41:12,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:41:12,919 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) [2022-02-10 03:41:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:15,225 INFO L93 Difference]: Finished difference Result 3534 states and 6358 transitions. [2022-02-10 03:41:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-10 03:41:15,226 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 [2022-02-10 03:41:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:15,230 INFO L225 Difference]: With dead ends: 3534 [2022-02-10 03:41:15,230 INFO L226 Difference]: Without dead ends: 3507 [2022-02-10 03:41:15,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2659 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=992, Invalid=6664, Unknown=0, NotChecked=0, Total=7656 [2022-02-10 03:41:15,231 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 200 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:41:15,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 643 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1008 Invalid, 0 Unknown, 1805 Unchecked, 0.5s Time] [2022-02-10 03:41:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-02-10 03:41:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 1943. [2022-02-10 03:41:15,251 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) [2022-02-10 03:41:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3559 transitions. [2022-02-10 03:41:15,254 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3559 transitions. Word has length 41 [2022-02-10 03:41:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:15,254 INFO L470 AbstractCegarLoop]: Abstraction has 1943 states and 3559 transitions. [2022-02-10 03:41:15,254 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) [2022-02-10 03:41:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3559 transitions. [2022-02-10 03:41:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:15,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:15,257 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] [2022-02-10 03:41:15,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-10 03:41:15,471 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 [2022-02-10 03:41:15,471 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash -187307664, now seen corresponding path program 24 times [2022-02-10 03:41:15,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:15,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54561723] [2022-02-10 03:41:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:15,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:15,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:15,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54561723] [2022-02-10 03:41:15,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54561723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:15,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985310940] [2022-02-10 03:41:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:41:15,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:15,958 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) [2022-02-10 03:41:15,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:41:15,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:41:15,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:15,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:41:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:17,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:17,024 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 [2022-02-10 03:41:17,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:17,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:17,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:17,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:17,563 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 [2022-02-10 03:41:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:17,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:19,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:19,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:19,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:19,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:19,159 INFO L353 Elim1Store]: treesize reduction 16, result has 78.1 percent of original size [2022-02-10 03:41:19,159 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 [2022-02-10 03:41:19,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:19,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985310940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:19,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:19,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 52 [2022-02-10 03:41:19,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981679941] [2022-02-10 03:41:19,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:19,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-10 03:41:19,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-10 03:41:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2327, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:41:19,944 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) [2022-02-10 03:41:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:22,835 INFO L93 Difference]: Finished difference Result 3697 states and 6490 transitions. [2022-02-10 03:41:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-10 03:41:22,836 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 [2022-02-10 03:41:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:22,840 INFO L225 Difference]: With dead ends: 3697 [2022-02-10 03:41:22,840 INFO L226 Difference]: Without dead ends: 3652 [2022-02-10 03:41:22,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1751, Invalid=8755, Unknown=0, NotChecked=0, Total=10506 [2022-02-10 03:41:22,841 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 [2022-02-10 03:41:22,842 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] [2022-02-10 03:41:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2022-02-10 03:41:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 2263. [2022-02-10 03:41:22,866 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) [2022-02-10 03:41:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4142 transitions. [2022-02-10 03:41:22,869 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4142 transitions. Word has length 41 [2022-02-10 03:41:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:22,869 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 4142 transitions. [2022-02-10 03:41:22,869 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) [2022-02-10 03:41:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4142 transitions. [2022-02-10 03:41:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:22,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:22,872 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] [2022-02-10 03:41:22,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-10 03:41:23,073 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 [2022-02-10 03:41:23,073 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1054582392, now seen corresponding path program 25 times [2022-02-10 03:41:23,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:23,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901226067] [2022-02-10 03:41:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:23,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:23,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:23,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901226067] [2022-02-10 03:41:23,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901226067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:23,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220434518] [2022-02-10 03:41:23,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:41:23,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:23,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:23,508 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) [2022-02-10 03:41:23,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:41:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:23,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:41:23,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:23,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:23,994 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 [2022-02-10 03:41:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:24,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:24,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:24,384 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 [2022-02-10 03:41:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:24,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:25,057 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:41:25,058 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 [2022-02-10 03:41:25,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:25,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220434518] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:25,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:25,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 45 [2022-02-10 03:41:25,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606172318] [2022-02-10 03:41:25,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:25,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:41:25,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:41:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:41:25,836 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) [2022-02-10 03:41:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:26,965 INFO L93 Difference]: Finished difference Result 4222 states and 7632 transitions. [2022-02-10 03:41:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:41:26,966 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 [2022-02-10 03:41:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:26,971 INFO L225 Difference]: With dead ends: 4222 [2022-02-10 03:41:26,971 INFO L226 Difference]: Without dead ends: 4195 [2022-02-10 03:41:26,972 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 [2022-02-10 03:41:26,972 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 [2022-02-10 03:41:26,972 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] [2022-02-10 03:41:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-02-10 03:41:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2319. [2022-02-10 03:41:27,002 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) [2022-02-10 03:41:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 4247 transitions. [2022-02-10 03:41:27,005 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 4247 transitions. Word has length 41 [2022-02-10 03:41:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:27,005 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 4247 transitions. [2022-02-10 03:41:27,005 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) [2022-02-10 03:41:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 4247 transitions. [2022-02-10 03:41:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:27,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:27,008 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] [2022-02-10 03:41:27,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 03:41:27,208 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 [2022-02-10 03:41:27,209 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1068261026, now seen corresponding path program 26 times [2022-02-10 03:41:27,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:27,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74505899] [2022-02-10 03:41:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:27,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:41:27,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:27,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74505899] [2022-02-10 03:41:27,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74505899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:27,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748927847] [2022-02-10 03:41:27,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:41:27,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:27,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:27,586 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) [2022-02-10 03:41:27,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-10 03:41:27,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:41:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:41:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:28,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:28,324 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 [2022-02-10 03:41:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:28,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:28,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:28,720 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 [2022-02-10 03:41:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:29,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-02-10 03:53:05,878 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 [2022-02-10 03:53:05,878 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 [2022-02-10 03:53:05,890 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-10 03:53:05,891 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-10 03:53:05,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-10 03:53:06,092 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 [2022-02-10 03:53:06,092 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 6 for 71ms.. [2022-02-10 03:53:06,094 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-10 03:53:06,094 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-10 03:53:06,096 INFO L732 BasicCegarLoop]: Path program histogram: [26, 11, 1, 1] [2022-02-10 03:53:06,097 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:53:06,097 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:53:06,099 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:53:06 BasicIcfg [2022-02-10 03:53:06,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:53:06,099 INFO L158 Benchmark]: Toolchain (without parser) took 836719.80ms. Allocated memory was 185.6MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 143.5MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2022-02-10 03:53:06,099 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:53:06,099 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.53ms. Allocated memory is still 185.6MB. Free memory was 143.5MB in the beginning and 142.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:53:06,100 INFO L158 Benchmark]: Boogie Preprocessor took 14.02ms. Allocated memory is still 185.6MB. Free memory was 142.0MB in the beginning and 141.0MB in the end (delta: 913.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:53:06,100 INFO L158 Benchmark]: RCFGBuilder took 204.95ms. Allocated memory is still 185.6MB. Free memory was 140.9MB in the beginning and 131.7MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-10 03:53:06,101 INFO L158 Benchmark]: TraceAbstraction took 836472.99ms. Allocated memory was 185.6MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 131.1MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2022-02-10 03:53:06,104 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 0.13ms. Allocated memory is still 185.6MB. Free memory is still 144.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.53ms. Allocated memory is still 185.6MB. Free memory was 143.5MB in the beginning and 142.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.02ms. Allocated memory is still 185.6MB. Free memory was 142.0MB in the beginning and 141.0MB in the end (delta: 913.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 204.95ms. Allocated memory is still 185.6MB. Free memory was 140.9MB in the beginning and 131.7MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 836472.99ms. Allocated memory was 185.6MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 131.1MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 2.9GB. 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 6 for 71ms.. - 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 6 for 71ms.. - 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 6 for 71ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 836.4s, OverallIterations: 39, TraceHistogramMax: 4, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.9s, AutomataDifference: 47.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, PartialOrderReductionTime: 4.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5282 SdHoareTripleChecker+Valid, 6.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5282 mSDsluCounter, 10516 SdHoareTripleChecker+Invalid, 5.4s 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, 57.9s 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: 1.1s AutomataMinimizationTime, 38 MinimizatonAttempts, 95443 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 74.1s 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