/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:52:00,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:52:00,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:52:00,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 06:52:00,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 06:52:00,229 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:52:00,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:52:00,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:52:00,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:52:00,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:52:00,231 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:52:00,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:52:00,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:52:00,231 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:52:00,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:52:00,232 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:52:00,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:52:00,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:52:00,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:52:00,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:52:00,234 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:52:00,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:52:00,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:52:00,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:52:00,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:52:00,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:52:00,446 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:52:00,448 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:52:00,448 INFO L432 ainManager$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 [2022-01-18 06:52:00,449 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2022-01-18 06:52:00,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:52:00,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:52:00,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:52:00,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:52:00,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:52:00,480 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 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,484 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 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,489 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:52:00,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:52:00,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:52:00,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:52:00,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:52:00,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:52:00,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:52:00,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:52:00,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:52:00,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:52:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:00,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 06:52:00,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 06:52:00,561 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:52:00,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:52:00,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:52:00,561 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:52:00,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:52:00,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:52:00,561 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:52:00,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:52:00,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:52:00,562 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 06:52:00,594 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:52:00,595 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:52:00,710 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:52:00,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:52:00,720 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:52:00,721 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:52:00 BoogieIcfgContainer [2022-01-18 06:52:00,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:52:00,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:52:00,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:52:00,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:52:00,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/2) ... [2022-01-18 06:52:00,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31cfcb4e and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:52:00, skipping insertion in model container [2022-01-18 06:52:00,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:52:00" (2/2) ... [2022-01-18 06:52:00,733 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2022-01-18 06:52:00,737 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:52:00,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:52:00,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:52:00,738 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:52:00,786 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 06:52:00,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:52:00,832 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 06:52:00,832 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 06:52:00,841 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-01-18 06:52:00,863 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) [2022-01-18 06:52:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2022-01-18 06:52:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 06:52:00,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:00,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:52:00,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1415635565, now seen corresponding path program 1 times [2022-01-18 06:52:00,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:00,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669713036] [2022-01-18 06:52:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:00,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:00,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:00,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669713036] [2022-01-18 06:52:01,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669713036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:52:01,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:52:01,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:52:01,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851729783] [2022-01-18 06:52:01,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:52:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:52:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:01,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:52:01,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:52:01,033 INFO L87 Difference]: Start difference. First operand 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) 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) [2022-01-18 06:52:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:01,087 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2022-01-18 06:52:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:52:01,089 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 [2022-01-18 06:52:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:01,095 INFO L225 Difference]: With dead ends: 104 [2022-01-18 06:52:01,095 INFO L226 Difference]: Without dead ends: 87 [2022-01-18 06:52:01,097 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 [2022-01-18 06:52:01,099 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:01,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:52:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-18 06:52:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2022-01-18 06:52:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2022-01-18 06:52:01,157 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2022-01-18 06:52:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:01,157 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2022-01-18 06:52:01,157 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) [2022-01-18 06:52:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2022-01-18 06:52:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:52:01,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:01,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:52:01,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:52:01,165 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1368071626, now seen corresponding path program 1 times [2022-01-18 06:52:01,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:01,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187165921] [2022-01-18 06:52:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:01,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:01,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:01,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187165921] [2022-01-18 06:52:01,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187165921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:52:01,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:52:01,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:52:01,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180237293] [2022-01-18 06:52:01,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:52:01,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:52:01,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:52:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:52:01,253 INFO L87 Difference]: Start difference. First operand 71 states and 142 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) [2022-01-18 06:52:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:01,280 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2022-01-18 06:52:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:52:01,280 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 [2022-01-18 06:52:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:01,281 INFO L225 Difference]: With dead ends: 91 [2022-01-18 06:52:01,281 INFO L226 Difference]: Without dead ends: 83 [2022-01-18 06:52:01,281 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 [2022-01-18 06:52:01,282 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:01,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:52:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-18 06:52:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-18 06:52:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2022-01-18 06:52:01,291 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2022-01-18 06:52:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:01,291 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2022-01-18 06:52:01,291 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) [2022-01-18 06:52:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2022-01-18 06:52:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 06:52:01,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:01,292 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] [2022-01-18 06:52:01,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 06:52:01,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1835440604, now seen corresponding path program 1 times [2022-01-18 06:52:01,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982016638] [2022-01-18 06:52:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:01,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:01,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:01,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982016638] [2022-01-18 06:52:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982016638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:01,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600699805] [2022-01-18 06:52:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:01,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:01,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:01,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 06:52:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 06:52:01,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:01,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 06:52:01,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:01,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:01,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 06:52:01,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:01,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600699805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:01,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:01,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-01-18 06:52:01,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345694501] [2022-01-18 06:52:01,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:01,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 06:52:01,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 06:52:01,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-18 06:52:01,903 INFO L87 Difference]: Start difference. First operand 83 states and 165 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) [2022-01-18 06:52:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:02,005 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2022-01-18 06:52:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:52:02,006 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 [2022-01-18 06:52:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:02,010 INFO L225 Difference]: With dead ends: 154 [2022-01-18 06:52:02,010 INFO L226 Difference]: Without dead ends: 137 [2022-01-18 06:52:02,011 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 [2022-01-18 06:52:02,013 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:02,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-18 06:52:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2022-01-18 06:52:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2022-01-18 06:52:02,032 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2022-01-18 06:52:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:02,034 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2022-01-18 06:52:02,034 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) [2022-01-18 06:52:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2022-01-18 06:52:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 06:52:02,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:02,035 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] [2022-01-18 06:52:02,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:02,248 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2029618617, now seen corresponding path program 2 times [2022-01-18 06:52:02,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:02,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946704337] [2022-01-18 06:52:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:02,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:02,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:02,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946704337] [2022-01-18 06:52:02,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946704337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:02,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133302875] [2022-01-18 06:52:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:02,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:02,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:02,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:02,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 06:52:02,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:02,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:02,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 06:52:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:02,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:02,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133302875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:02,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:02,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-01-18 06:52:02,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160964711] [2022-01-18 06:52:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:02,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:52:02,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:02,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:52:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:52:02,496 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:02,563 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2022-01-18 06:52:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 06:52:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 06:52:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:02,565 INFO L225 Difference]: With dead ends: 284 [2022-01-18 06:52:02,565 INFO L226 Difference]: Without dead ends: 264 [2022-01-18 06:52:02,565 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 [2022-01-18 06:52:02,568 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:02,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 59 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:52:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-18 06:52:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2022-01-18 06:52:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2022-01-18 06:52:02,594 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2022-01-18 06:52:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:02,594 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2022-01-18 06:52:02,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2022-01-18 06:52:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:02,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:02,596 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] [2022-01-18 06:52:02,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:02,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 06:52:02,817 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:02,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1131642343, now seen corresponding path program 3 times [2022-01-18 06:52:02,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:02,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071333692] [2022-01-18 06:52:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:02,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:03,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:03,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071333692] [2022-01-18 06:52:03,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071333692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:03,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223329564] [2022-01-18 06:52:03,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:03,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:03,090 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:03,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 06:52:03,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:52:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:03,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:03,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:52:03,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:03,517 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 [2022-01-18 06:52:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:03,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:04,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:04,435 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 [2022-01-18 06:52:04,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:04,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223329564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:04,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:04,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-01-18 06:52:04,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855013058] [2022-01-18 06:52:04,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:04,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:52:04,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:52:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:52:04,528 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:05,283 INFO L93 Difference]: Finished difference Result 536 states and 1142 transitions. [2022-01-18 06:52:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:52:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:05,286 INFO L225 Difference]: With dead ends: 536 [2022-01-18 06:52:05,286 INFO L226 Difference]: Without dead ends: 533 [2022-01-18 06:52:05,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 06:52:05,288 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:05,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 468 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 313 Invalid, 0 Unknown, 427 Unchecked, 0.1s Time] [2022-01-18 06:52:05,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-18 06:52:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 276. [2022-01-18 06:52:05,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1272727272727274) internal successors, (585), 275 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 585 transitions. [2022-01-18 06:52:05,296 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 585 transitions. Word has length 32 [2022-01-18 06:52:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:05,296 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 585 transitions. [2022-01-18 06:52:05,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 585 transitions. [2022-01-18 06:52:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:05,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:05,298 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] [2022-01-18 06:52:05,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:05,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:05,517 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1215898163, now seen corresponding path program 4 times [2022-01-18 06:52:05,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:05,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632466881] [2022-01-18 06:52:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:05,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:05,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:05,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632466881] [2022-01-18 06:52:05,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632466881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294882111] [2022-01-18 06:52:05,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:05,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:05,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:05,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:05,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 06:52:05,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:05,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:05,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:05,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:05,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:52:06,079 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:52:06,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 06:52:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:06,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:06,328 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:06,329 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 [2022-01-18 06:52:06,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:06,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294882111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:06,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:06,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-01-18 06:52:06,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111407255] [2022-01-18 06:52:06,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:06,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:52:06,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:52:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:52:06,542 INFO L87 Difference]: Start difference. First operand 276 states and 585 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:07,153 INFO L93 Difference]: Finished difference Result 546 states and 1148 transitions. [2022-01-18 06:52:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:52:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:52:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:07,156 INFO L225 Difference]: With dead ends: 546 [2022-01-18 06:52:07,156 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 06:52:07,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:52:07,157 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:07,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 295 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 880 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2022-01-18 06:52:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 06:52:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 281. [2022-01-18 06:52:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1285714285714286) internal successors, (596), 280 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 596 transitions. [2022-01-18 06:52:07,164 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 596 transitions. Word has length 32 [2022-01-18 06:52:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:07,165 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 596 transitions. [2022-01-18 06:52:07,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 596 transitions. [2022-01-18 06:52:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:07,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:07,166 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] [2022-01-18 06:52:07,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:07,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:07,379 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 307390119, now seen corresponding path program 5 times [2022-01-18 06:52:07,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648276596] [2022-01-18 06:52:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:07,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:07,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:07,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648276596] [2022-01-18 06:52:07,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648276596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:07,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973976750] [2022-01-18 06:52:07,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:07,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:07,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:07,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:07,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 06:52:07,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:07,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:07,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:07,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:07,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:08,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:08,017 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 [2022-01-18 06:52:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:08,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:08,277 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:08,277 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 35 treesize of output 57 [2022-01-18 06:52:08,395 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 [2022-01-18 06:52:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:08,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973976750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:08,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:08,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-01-18 06:52:08,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501332621] [2022-01-18 06:52:08,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:08,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:08,435 INFO L87 Difference]: Start difference. First operand 281 states and 596 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 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) [2022-01-18 06:52:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:08,628 INFO L93 Difference]: Finished difference Result 554 states and 1191 transitions. [2022-01-18 06:52:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:52:08,628 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 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 [2022-01-18 06:52:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:08,631 INFO L225 Difference]: With dead ends: 554 [2022-01-18 06:52:08,631 INFO L226 Difference]: Without dead ends: 527 [2022-01-18 06:52:08,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:52:08,632 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:08,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 108 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-01-18 06:52:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-18 06:52:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 317. [2022-01-18 06:52:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.1645569620253164) internal successors, (684), 316 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 684 transitions. [2022-01-18 06:52:08,639 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 684 transitions. Word has length 32 [2022-01-18 06:52:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:08,639 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 684 transitions. [2022-01-18 06:52:08,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 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) [2022-01-18 06:52:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 684 transitions. [2022-01-18 06:52:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:08,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:08,640 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] [2022-01-18 06:52:08,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:08,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:08,855 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1473211481, now seen corresponding path program 6 times [2022-01-18 06:52:08,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:08,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106595023] [2022-01-18 06:52:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:08,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:09,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106595023] [2022-01-18 06:52:09,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106595023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:09,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614238048] [2022-01-18 06:52:09,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:09,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:09,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:09,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:09,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 06:52:09,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:09,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:09,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:09,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:09,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:09,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:09,500 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 [2022-01-18 06:52:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:09,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:09,786 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:09,786 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 [2022-01-18 06:52:09,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:09,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614238048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:09,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:09,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-01-18 06:52:09,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513586904] [2022-01-18 06:52:09,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:09,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:09,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:09,923 INFO L87 Difference]: Start difference. First operand 317 states and 684 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:10,106 INFO L93 Difference]: Finished difference Result 639 states and 1386 transitions. [2022-01-18 06:52:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 06:52:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:10,108 INFO L225 Difference]: With dead ends: 639 [2022-01-18 06:52:10,108 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 06:52:10,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:52:10,109 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:10,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 220 Unchecked, 0.1s Time] [2022-01-18 06:52:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 06:52:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 324. [2022-01-18 06:52:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1393188854489162) internal successors, (691), 323 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 691 transitions. [2022-01-18 06:52:10,117 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 691 transitions. Word has length 32 [2022-01-18 06:52:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:10,117 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 691 transitions. [2022-01-18 06:52:10,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 691 transitions. [2022-01-18 06:52:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:10,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:10,118 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] [2022-01-18 06:52:10,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:10,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:10,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1147796233, now seen corresponding path program 7 times [2022-01-18 06:52:10,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175005165] [2022-01-18 06:52:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:10,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:10,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175005165] [2022-01-18 06:52:10,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175005165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298444328] [2022-01-18 06:52:10,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:10,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:10,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:10,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:10,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 06:52:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:10,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:10,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:10,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:10,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:10,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:10,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:10,917 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 [2022-01-18 06:52:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:10,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:11,166 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:11,167 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 [2022-01-18 06:52:11,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:11,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298444328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:11,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:11,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-01-18 06:52:11,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027779543] [2022-01-18 06:52:11,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:11,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:11,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:11,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:11,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:11,301 INFO L87 Difference]: Start difference. First operand 324 states and 691 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:11,519 INFO L93 Difference]: Finished difference Result 572 states and 1216 transitions. [2022-01-18 06:52:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:52:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:11,521 INFO L225 Difference]: With dead ends: 572 [2022-01-18 06:52:11,522 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 06:52:11,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:52:11,522 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:11,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-01-18 06:52:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 06:52:11,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 393. [2022-01-18 06:52:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.1581632653061225) internal successors, (846), 392 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 846 transitions. [2022-01-18 06:52:11,530 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 846 transitions. Word has length 32 [2022-01-18 06:52:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:11,531 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 846 transitions. [2022-01-18 06:52:11,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 846 transitions. [2022-01-18 06:52:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:11,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:11,532 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] [2022-01-18 06:52:11,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 06:52:11,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:11,748 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1369686285, now seen corresponding path program 8 times [2022-01-18 06:52:11,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855280623] [2022-01-18 06:52:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:11,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:11,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:11,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855280623] [2022-01-18 06:52:11,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855280623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:11,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351097087] [2022-01-18 06:52:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:11,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:11,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:11,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 06:52:11,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:11,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:11,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:12,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:12,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:12,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:12,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:12,344 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 [2022-01-18 06:52:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:12,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:12,622 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:12,622 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 [2022-01-18 06:52:12,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:12,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351097087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:12,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:12,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 29 [2022-01-18 06:52:12,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799375985] [2022-01-18 06:52:12,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:12,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:12,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:12,750 INFO L87 Difference]: Start difference. First operand 393 states and 846 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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) [2022-01-18 06:52:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:13,187 INFO L93 Difference]: Finished difference Result 743 states and 1622 transitions. [2022-01-18 06:52:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:52:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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 [2022-01-18 06:52:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:13,189 INFO L225 Difference]: With dead ends: 743 [2022-01-18 06:52:13,190 INFO L226 Difference]: Without dead ends: 716 [2022-01-18 06:52:13,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:52:13,191 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:13,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 182 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 453 Invalid, 0 Unknown, 326 Unchecked, 0.2s Time] [2022-01-18 06:52:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-18 06:52:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 426. [2022-01-18 06:52:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1788235294117646) internal successors, (926), 425 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 926 transitions. [2022-01-18 06:52:13,201 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 926 transitions. Word has length 32 [2022-01-18 06:52:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:13,202 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 926 transitions. [2022-01-18 06:52:13,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 29 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) [2022-01-18 06:52:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 926 transitions. [2022-01-18 06:52:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:13,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:13,203 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] [2022-01-18 06:52:13,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:13,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 06:52:13,420 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash -727791177, now seen corresponding path program 9 times [2022-01-18 06:52:13,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817363589] [2022-01-18 06:52:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:13,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:13,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817363589] [2022-01-18 06:52:13,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817363589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285364780] [2022-01-18 06:52:13,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:13,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:13,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:13,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:13,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 06:52:13,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:13,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:13,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:13,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:13,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:13,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-01-18 06:52:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:14,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:14,182 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 [2022-01-18 06:52:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:14,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:15,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:15,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:15,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:15,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:15,642 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 [2022-01-18 06:52:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:15,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285364780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:15,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:15,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 37 [2022-01-18 06:52:15,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423709424] [2022-01-18 06:52:15,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 06:52:15,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 06:52:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:52:15,728 INFO L87 Difference]: Start difference. First operand 426 states and 926 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:18,054 INFO L93 Difference]: Finished difference Result 1367 states and 2897 transitions. [2022-01-18 06:52:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 06:52:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:18,058 INFO L225 Difference]: With dead ends: 1367 [2022-01-18 06:52:18,058 INFO L226 Difference]: Without dead ends: 1312 [2022-01-18 06:52:18,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1210, Invalid=6800, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 06:52:18,061 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 598 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 749 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:18,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 396 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 903 Invalid, 0 Unknown, 749 Unchecked, 0.5s Time] [2022-01-18 06:52:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-01-18 06:52:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 562. [2022-01-18 06:52:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.229946524064171) internal successors, (1251), 561 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1251 transitions. [2022-01-18 06:52:18,074 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1251 transitions. Word has length 32 [2022-01-18 06:52:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:18,075 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1251 transitions. [2022-01-18 06:52:18,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1251 transitions. [2022-01-18 06:52:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:18,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:18,076 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] [2022-01-18 06:52:18,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:18,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:18,293 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1786574519, now seen corresponding path program 10 times [2022-01-18 06:52:18,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070454740] [2022-01-18 06:52:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:18,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:18,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070454740] [2022-01-18 06:52:18,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070454740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271785335] [2022-01-18 06:52:18,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:18,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:18,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:18,525 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:18,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 06:52:18,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:18,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:18,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:18,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:18,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:18,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:18,856 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 [2022-01-18 06:52:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:18,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:19,123 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:19,123 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 [2022-01-18 06:52:19,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:19,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271785335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:19,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:19,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 06:52:19,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617228089] [2022-01-18 06:52:19,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:19,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:19,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:19,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:19,242 INFO L87 Difference]: Start difference. First operand 562 states and 1251 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:19,458 INFO L93 Difference]: Finished difference Result 669 states and 1470 transitions. [2022-01-18 06:52:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 06:52:19,458 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:19,460 INFO L225 Difference]: With dead ends: 669 [2022-01-18 06:52:19,460 INFO L226 Difference]: Without dead ends: 652 [2022-01-18 06:52:19,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:52:19,461 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:19,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 111 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 181 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-01-18 06:52:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-18 06:52:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 584. [2022-01-18 06:52:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2315608919382504) internal successors, (1301), 583 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1301 transitions. [2022-01-18 06:52:19,471 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1301 transitions. Word has length 32 [2022-01-18 06:52:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:19,471 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1301 transitions. [2022-01-18 06:52:19,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1301 transitions. [2022-01-18 06:52:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:19,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:19,472 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] [2022-01-18 06:52:19,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:19,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 06:52:19,687 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 112614937, now seen corresponding path program 11 times [2022-01-18 06:52:19,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481187751] [2022-01-18 06:52:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:19,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:19,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:19,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481187751] [2022-01-18 06:52:19,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481187751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:19,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381391144] [2022-01-18 06:52:19,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:19,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:19,896 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:19,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 06:52:19,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:19,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:19,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:20,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:20,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:20,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:20,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:20,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 06:52:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:20,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:20,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:20,535 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 [2022-01-18 06:52:20,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:20,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381391144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:20,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:20,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 34 [2022-01-18 06:52:20,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932036087] [2022-01-18 06:52:20,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:20,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:52:20,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:52:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:52:20,751 INFO L87 Difference]: Start difference. First operand 584 states and 1301 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-18 06:52:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:21,131 INFO L93 Difference]: Finished difference Result 969 states and 2149 transitions. [2022-01-18 06:52:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:52:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 32 [2022-01-18 06:52:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:21,135 INFO L225 Difference]: With dead ends: 969 [2022-01-18 06:52:21,135 INFO L226 Difference]: Without dead ends: 944 [2022-01-18 06:52:21,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:52:21,136 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:21,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 167 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 322 Unchecked, 0.1s Time] [2022-01-18 06:52:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-18 06:52:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 655. [2022-01-18 06:52:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.2370030581039755) internal successors, (1463), 654 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1463 transitions. [2022-01-18 06:52:21,149 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1463 transitions. Word has length 32 [2022-01-18 06:52:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:21,149 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1463 transitions. [2022-01-18 06:52:21,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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) [2022-01-18 06:52:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1463 transitions. [2022-01-18 06:52:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:21,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:21,151 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] [2022-01-18 06:52:21,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:21,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 06:52:21,363 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash -708561801, now seen corresponding path program 12 times [2022-01-18 06:52:21,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:21,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500167577] [2022-01-18 06:52:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:21,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:21,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:21,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500167577] [2022-01-18 06:52:21,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500167577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:21,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009646550] [2022-01-18 06:52:21,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:21,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:21,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:21,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:21,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 06:52:21,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:21,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:21,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:21,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:21,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:21,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:21,918 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 [2022-01-18 06:52:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:21,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:22,221 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:22,221 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 [2022-01-18 06:52:22,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:22,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009646550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:22,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:22,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 06:52:22,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424760261] [2022-01-18 06:52:22,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:22,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:22,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:22,349 INFO L87 Difference]: Start difference. First operand 655 states and 1463 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:22,517 INFO L93 Difference]: Finished difference Result 715 states and 1583 transitions. [2022-01-18 06:52:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:52:22,518 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:22,522 INFO L225 Difference]: With dead ends: 715 [2022-01-18 06:52:22,522 INFO L226 Difference]: Without dead ends: 707 [2022-01-18 06:52:22,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:52:22,523 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:22,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2022-01-18 06:52:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-18 06:52:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 682. [2022-01-18 06:52:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.2305433186490453) internal successors, (1519), 681 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1519 transitions. [2022-01-18 06:52:22,537 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1519 transitions. Word has length 32 [2022-01-18 06:52:22,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:22,538 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1519 transitions. [2022-01-18 06:52:22,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1519 transitions. [2022-01-18 06:52:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:22,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:22,539 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] [2022-01-18 06:52:22,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:22,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 06:52:22,751 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash 306961723, now seen corresponding path program 13 times [2022-01-18 06:52:22,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:22,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089707744] [2022-01-18 06:52:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:22,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:22,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:22,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089707744] [2022-01-18 06:52:22,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089707744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:22,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971111135] [2022-01-18 06:52:22,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:22,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:22,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:22,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 06:52:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:22,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:23,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:23,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:23,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:23,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:23,292 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 [2022-01-18 06:52:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:23,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:23,569 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:23,569 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 [2022-01-18 06:52:23,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:23,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971111135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:23,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:23,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-01-18 06:52:23,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919963174] [2022-01-18 06:52:23,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:23,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:52:23,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:52:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:52:23,693 INFO L87 Difference]: Start difference. First operand 682 states and 1519 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-01-18 06:52:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:24,341 INFO L93 Difference]: Finished difference Result 1476 states and 3239 transitions. [2022-01-18 06:52:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:52:24,342 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 [2022-01-18 06:52:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:24,346 INFO L225 Difference]: With dead ends: 1476 [2022-01-18 06:52:24,346 INFO L226 Difference]: Without dead ends: 1322 [2022-01-18 06:52:24,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 06:52:24,347 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 252 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:24,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 349 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 530 Invalid, 0 Unknown, 467 Unchecked, 0.2s Time] [2022-01-18 06:52:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-01-18 06:52:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 843. [2022-01-18 06:52:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.2422802850356294) internal successors, (1888), 842 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1888 transitions. [2022-01-18 06:52:24,361 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1888 transitions. Word has length 32 [2022-01-18 06:52:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:24,361 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1888 transitions. [2022-01-18 06:52:24,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-01-18 06:52:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1888 transitions. [2022-01-18 06:52:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:24,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:24,363 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] [2022-01-18 06:52:24,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:24,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 06:52:24,579 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1366997859, now seen corresponding path program 14 times [2022-01-18 06:52:24,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:24,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185691129] [2022-01-18 06:52:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:24,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:24,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:24,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185691129] [2022-01-18 06:52:24,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185691129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:24,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887111294] [2022-01-18 06:52:24,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:24,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:24,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:24,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 06:52:24,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:24,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:24,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:25,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:25,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:25,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:25,141 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 [2022-01-18 06:52:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:25,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:25,398 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:25,399 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 [2022-01-18 06:52:25,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:25,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887111294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:25,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:25,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 30 [2022-01-18 06:52:25,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610065425] [2022-01-18 06:52:25,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:25,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:52:25,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:52:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:52:25,494 INFO L87 Difference]: Start difference. First operand 843 states and 1888 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-01-18 06:52:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:26,112 INFO L93 Difference]: Finished difference Result 1446 states and 3193 transitions. [2022-01-18 06:52:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 06:52:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 [2022-01-18 06:52:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:26,117 INFO L225 Difference]: With dead ends: 1446 [2022-01-18 06:52:26,117 INFO L226 Difference]: Without dead ends: 1352 [2022-01-18 06:52:26,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2307, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 06:52:26,118 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:26,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 247 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 409 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2022-01-18 06:52:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-01-18 06:52:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1008. [2022-01-18 06:52:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.266137040714995) internal successors, (2282), 1007 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2282 transitions. [2022-01-18 06:52:26,134 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2282 transitions. Word has length 32 [2022-01-18 06:52:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:26,134 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 2282 transitions. [2022-01-18 06:52:26,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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) [2022-01-18 06:52:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2282 transitions. [2022-01-18 06:52:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:26,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:26,136 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] [2022-01-18 06:52:26,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:26,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:26,343 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2106792699, now seen corresponding path program 15 times [2022-01-18 06:52:26,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:26,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262404168] [2022-01-18 06:52:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:26,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:26,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262404168] [2022-01-18 06:52:26,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262404168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949264688] [2022-01-18 06:52:26,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:26,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:26,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:26,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 06:52:26,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:26,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:52:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:26,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:26,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:26,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:26,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:26,916 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 20 treesize of output 28 [2022-01-18 06:52:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:27,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:27,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:27,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:27,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:27,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:27,660 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 33 treesize of output 37 [2022-01-18 06:52:27,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 06:52:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:27,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949264688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:27,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:27,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2022-01-18 06:52:27,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980902999] [2022-01-18 06:52:27,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:27,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 06:52:27,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 06:52:27,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:52:27,929 INFO L87 Difference]: Start difference. First operand 1008 states and 2282 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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) [2022-01-18 06:52:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:28,601 INFO L93 Difference]: Finished difference Result 1235 states and 2744 transitions. [2022-01-18 06:52:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:52:28,602 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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 32 [2022-01-18 06:52:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:28,605 INFO L225 Difference]: With dead ends: 1235 [2022-01-18 06:52:28,605 INFO L226 Difference]: Without dead ends: 1214 [2022-01-18 06:52:28,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 06:52:28,607 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:28,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 215 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 311 Unchecked, 0.0s Time] [2022-01-18 06:52:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-01-18 06:52:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1080. [2022-01-18 06:52:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 2.2567191844300276) internal successors, (2435), 1079 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2435 transitions. [2022-01-18 06:52:28,621 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2435 transitions. Word has length 32 [2022-01-18 06:52:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:28,622 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 2435 transitions. [2022-01-18 06:52:28,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 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) [2022-01-18 06:52:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2435 transitions. [2022-01-18 06:52:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:28,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:28,623 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] [2022-01-18 06:52:28,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:28,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 06:52:28,839 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash 78448107, now seen corresponding path program 16 times [2022-01-18 06:52:28,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:28,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654577219] [2022-01-18 06:52:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:28,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:29,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654577219] [2022-01-18 06:52:29,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654577219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445082989] [2022-01-18 06:52:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:29,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:29,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:29,022 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:29,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 06:52:29,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:29,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:29,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:29,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:29,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:29,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-01-18 06:52:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:29,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:29,680 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:29,680 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 [2022-01-18 06:52:29,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:29,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445082989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:29,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:29,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 06:52:29,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934696737] [2022-01-18 06:52:29,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:29,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:29,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:29,857 INFO L87 Difference]: Start difference. First operand 1080 states and 2435 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) [2022-01-18 06:52:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:30,080 INFO L93 Difference]: Finished difference Result 1216 states and 2718 transitions. [2022-01-18 06:52:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:52:30,081 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 [2022-01-18 06:52:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:30,084 INFO L225 Difference]: With dead ends: 1216 [2022-01-18 06:52:30,084 INFO L226 Difference]: Without dead ends: 1204 [2022-01-18 06:52:30,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:52:30,087 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:30,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 125 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-01-18 06:52:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-01-18 06:52:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1083. [2022-01-18 06:52:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.253234750462107) internal successors, (2438), 1082 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2438 transitions. [2022-01-18 06:52:30,102 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2438 transitions. Word has length 32 [2022-01-18 06:52:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:30,102 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2438 transitions. [2022-01-18 06:52:30,102 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) [2022-01-18 06:52:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2438 transitions. [2022-01-18 06:52:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:30,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:30,104 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] [2022-01-18 06:52:30,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:30,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 06:52:30,320 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1563537433, now seen corresponding path program 17 times [2022-01-18 06:52:30,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:30,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858585356] [2022-01-18 06:52:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:30,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:30,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:30,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858585356] [2022-01-18 06:52:30,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858585356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:30,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126450405] [2022-01-18 06:52:30,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:30,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:30,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:30,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:30,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:52:30,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:30,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:30,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:30,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:30,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:30,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:30,891 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 [2022-01-18 06:52:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:30,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:31,135 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:31,135 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 [2022-01-18 06:52:31,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:31,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126450405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:31,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:31,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 06:52:31,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247896336] [2022-01-18 06:52:31,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:31,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:31,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:31,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:31,309 INFO L87 Difference]: Start difference. First operand 1083 states and 2438 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) [2022-01-18 06:52:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:31,494 INFO L93 Difference]: Finished difference Result 1155 states and 2591 transitions. [2022-01-18 06:52:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:52:31,495 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 [2022-01-18 06:52:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:31,498 INFO L225 Difference]: With dead ends: 1155 [2022-01-18 06:52:31,498 INFO L226 Difference]: Without dead ends: 1141 [2022-01-18 06:52:31,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:52:31,499 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:31,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-01-18 06:52:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-01-18 06:52:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1086. [2022-01-18 06:52:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.249769585253456) internal successors, (2441), 1085 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2441 transitions. [2022-01-18 06:52:31,512 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2441 transitions. Word has length 32 [2022-01-18 06:52:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:31,513 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2441 transitions. [2022-01-18 06:52:31,513 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) [2022-01-18 06:52:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2441 transitions. [2022-01-18 06:52:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:31,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:31,514 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] [2022-01-18 06:52:31,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:31,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:31,727 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:31,728 INFO L85 PathProgramCache]: Analyzing trace with hash -889796407, now seen corresponding path program 18 times [2022-01-18 06:52:31,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428973812] [2022-01-18 06:52:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:31,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:31,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428973812] [2022-01-18 06:52:31,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428973812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782342323] [2022-01-18 06:52:31,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:31,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:31,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:31,914 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:31,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:52:31,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:31,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:32,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:32,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:52:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:32,290 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 [2022-01-18 06:52:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:32,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:32,538 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:32,538 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 [2022-01-18 06:52:32,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:32,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782342323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:32,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:32,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 06:52:32,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834244617] [2022-01-18 06:52:32,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:32,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:32,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:32,659 INFO L87 Difference]: Start difference. First operand 1086 states and 2441 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) [2022-01-18 06:52:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:32,939 INFO L93 Difference]: Finished difference Result 1287 states and 2865 transitions. [2022-01-18 06:52:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:52:32,939 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 [2022-01-18 06:52:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:32,949 INFO L225 Difference]: With dead ends: 1287 [2022-01-18 06:52:32,950 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 06:52:32,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:52:32,950 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:32,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 140 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 241 Unchecked, 0.1s Time] [2022-01-18 06:52:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 06:52:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1147. [2022-01-18 06:52:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 2.244328097731239) internal successors, (2572), 1146 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2572 transitions. [2022-01-18 06:52:32,970 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2572 transitions. Word has length 32 [2022-01-18 06:52:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:32,970 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 2572 transitions. [2022-01-18 06:52:32,970 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) [2022-01-18 06:52:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2572 transitions. [2022-01-18 06:52:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:32,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:32,972 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] [2022-01-18 06:52:32,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:33,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:33,183 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1976105177, now seen corresponding path program 19 times [2022-01-18 06:52:33,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:33,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588386625] [2022-01-18 06:52:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:33,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:33,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588386625] [2022-01-18 06:52:33,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588386625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448063902] [2022-01-18 06:52:33,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:33,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:33,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:33,381 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:33,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:52:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:33,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:33,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 06:52:33,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:33,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:33,762 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 [2022-01-18 06:52:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:34,040 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:34,041 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 [2022-01-18 06:52:34,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:34,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448063902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:34,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:34,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 06:52:34,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677144513] [2022-01-18 06:52:34,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:34,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:34,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:34,163 INFO L87 Difference]: Start difference. First operand 1147 states and 2572 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:52:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:34,408 INFO L93 Difference]: Finished difference Result 1262 states and 2801 transitions. [2022-01-18 06:52:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:52:34,408 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 [2022-01-18 06:52:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:34,412 INFO L225 Difference]: With dead ends: 1262 [2022-01-18 06:52:34,412 INFO L226 Difference]: Without dead ends: 1236 [2022-01-18 06:52:34,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:52:34,413 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:34,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 163 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-01-18 06:52:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-01-18 06:52:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1157. [2022-01-18 06:52:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2422145328719725) internal successors, (2592), 1156 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2592 transitions. [2022-01-18 06:52:34,427 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2592 transitions. Word has length 32 [2022-01-18 06:52:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:34,428 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 2592 transitions. [2022-01-18 06:52:34,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:52:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2592 transitions. [2022-01-18 06:52:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:34,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:34,430 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] [2022-01-18 06:52:34,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-18 06:52:34,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:34,646 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash -516998149, now seen corresponding path program 20 times [2022-01-18 06:52:34,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:34,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059131545] [2022-01-18 06:52:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:34,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:34,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059131545] [2022-01-18 06:52:34,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059131545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668514889] [2022-01-18 06:52:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:34,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:34,835 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:34,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:52:34,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:34,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:34,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:35,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:35,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 06:52:35,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:35,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:35,171 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 [2022-01-18 06:52:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:35,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:35,412 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:35,413 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 [2022-01-18 06:52:35,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:35,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668514889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:35,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:35,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 06:52:35,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454729165] [2022-01-18 06:52:35,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:35,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:35,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:35,540 INFO L87 Difference]: Start difference. First operand 1157 states and 2592 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:35,803 INFO L93 Difference]: Finished difference Result 1281 states and 2850 transitions. [2022-01-18 06:52:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:52:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:35,807 INFO L225 Difference]: With dead ends: 1281 [2022-01-18 06:52:35,807 INFO L226 Difference]: Without dead ends: 1260 [2022-01-18 06:52:35,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:52:35,808 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:35,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 307 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-01-18 06:52:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-01-18 06:52:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1165. [2022-01-18 06:52:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.2448453608247423) internal successors, (2613), 1164 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2613 transitions. [2022-01-18 06:52:35,822 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2613 transitions. Word has length 32 [2022-01-18 06:52:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:35,823 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2613 transitions. [2022-01-18 06:52:35,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2613 transitions. [2022-01-18 06:52:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:35,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:35,824 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] [2022-01-18 06:52:35,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:36,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 06:52:36,035 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash 495694383, now seen corresponding path program 21 times [2022-01-18 06:52:36,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:36,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631991878] [2022-01-18 06:52:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:36,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:36,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:36,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631991878] [2022-01-18 06:52:36,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631991878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:36,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051249660] [2022-01-18 06:52:36,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:36,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:36,221 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:36,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:52:36,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:36,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:36,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:36,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:36,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:36,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:52:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:36,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:36,562 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 [2022-01-18 06:52:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:36,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:36,824 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:36,825 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 [2022-01-18 06:52:36,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:36,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051249660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:36,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:36,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-01-18 06:52:36,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376071423] [2022-01-18 06:52:36,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:36,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:36,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:36,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:36,966 INFO L87 Difference]: Start difference. First operand 1165 states and 2613 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:37,215 INFO L93 Difference]: Finished difference Result 1292 states and 2864 transitions. [2022-01-18 06:52:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:52:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:37,223 INFO L225 Difference]: With dead ends: 1292 [2022-01-18 06:52:37,223 INFO L226 Difference]: Without dead ends: 1268 [2022-01-18 06:52:37,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:52:37,224 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:37,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 158 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 260 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-01-18 06:52:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-01-18 06:52:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1176. [2022-01-18 06:52:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.244255319148936) internal successors, (2637), 1175 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2637 transitions. [2022-01-18 06:52:37,239 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2637 transitions. Word has length 32 [2022-01-18 06:52:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:37,239 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2637 transitions. [2022-01-18 06:52:37,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2637 transitions. [2022-01-18 06:52:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:37,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:37,241 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] [2022-01-18 06:52:37,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:37,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 06:52:37,455 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:37,456 INFO L85 PathProgramCache]: Analyzing trace with hash -956375147, now seen corresponding path program 22 times [2022-01-18 06:52:37,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183999440] [2022-01-18 06:52:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:37,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:37,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183999440] [2022-01-18 06:52:37,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183999440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38144834] [2022-01-18 06:52:37,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:37,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:37,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:37,650 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:37,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:52:37,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:37,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:37,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:37,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 06:52:37,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:37,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:37,971 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 [2022-01-18 06:52:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:37,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:38,234 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:38,235 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 [2022-01-18 06:52:38,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:38,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38144834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:38,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:38,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 31 [2022-01-18 06:52:38,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814902682] [2022-01-18 06:52:38,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:38,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:52:38,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:52:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:52:38,368 INFO L87 Difference]: Start difference. First operand 1176 states and 2637 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:38,681 INFO L93 Difference]: Finished difference Result 1465 states and 3217 transitions. [2022-01-18 06:52:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 06:52:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:38,684 INFO L225 Difference]: With dead ends: 1465 [2022-01-18 06:52:38,684 INFO L226 Difference]: Without dead ends: 1415 [2022-01-18 06:52:38,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:52:38,685 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:38,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 163 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 302 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-01-18 06:52:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-18 06:52:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1212. [2022-01-18 06:52:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.255986787778695) internal successors, (2732), 1211 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2732 transitions. [2022-01-18 06:52:38,700 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2732 transitions. Word has length 32 [2022-01-18 06:52:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:38,700 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2732 transitions. [2022-01-18 06:52:38,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2732 transitions. [2022-01-18 06:52:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:38,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:38,702 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] [2022-01-18 06:52:38,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:38,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:38,917 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1996610945, now seen corresponding path program 23 times [2022-01-18 06:52:38,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:38,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429825936] [2022-01-18 06:52:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:38,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:39,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429825936] [2022-01-18 06:52:39,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429825936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878274648] [2022-01-18 06:52:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:39,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:39,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:39,135 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:39,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:52:39,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:39,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:39,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:52:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:39,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:39,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:52:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:39,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:39,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:39,517 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 [2022-01-18 06:52:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:39,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:39,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:39,807 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 [2022-01-18 06:52:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878274648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:40,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:40,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 36 [2022-01-18 06:52:40,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508113430] [2022-01-18 06:52:40,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 06:52:40,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 06:52:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:52:40,024 INFO L87 Difference]: Start difference. First operand 1212 states and 2732 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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) [2022-01-18 06:52:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:41,566 INFO L93 Difference]: Finished difference Result 2662 states and 5786 transitions. [2022-01-18 06:52:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:52:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 [2022-01-18 06:52:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:41,571 INFO L225 Difference]: With dead ends: 2662 [2022-01-18 06:52:41,571 INFO L226 Difference]: Without dead ends: 2469 [2022-01-18 06:52:41,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1014, Invalid=5628, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 06:52:41,572 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 340 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:41,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 379 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 922 Invalid, 0 Unknown, 416 Unchecked, 0.4s Time] [2022-01-18 06:52:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-01-18 06:52:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1440. [2022-01-18 06:52:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 2.244614315496873) internal successors, (3230), 1439 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 3230 transitions. [2022-01-18 06:52:41,595 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 3230 transitions. Word has length 32 [2022-01-18 06:52:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:41,595 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 3230 transitions. [2022-01-18 06:52:41,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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) [2022-01-18 06:52:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 3230 transitions. [2022-01-18 06:52:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:41,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:41,597 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] [2022-01-18 06:52:41,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 06:52:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:41,807 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1401532203, now seen corresponding path program 24 times [2022-01-18 06:52:41,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348259481] [2022-01-18 06:52:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:41,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348259481] [2022-01-18 06:52:41,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348259481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297690720] [2022-01-18 06:52:41,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:41,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:41,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:41,984 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:41,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:52:42,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:42,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:42,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:42,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:52:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:42,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:42,332 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 [2022-01-18 06:52:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:42,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:42,566 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:42,566 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 [2022-01-18 06:52:42,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:42,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297690720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:42,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:42,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 06:52:42,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354903949] [2022-01-18 06:52:42,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:42,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:42,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:42,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:42,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:42,706 INFO L87 Difference]: Start difference. First operand 1440 states and 3230 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) [2022-01-18 06:52:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:42,974 INFO L93 Difference]: Finished difference Result 1680 states and 3724 transitions. [2022-01-18 06:52:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:52:42,974 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 [2022-01-18 06:52:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:42,977 INFO L225 Difference]: With dead ends: 1680 [2022-01-18 06:52:42,977 INFO L226 Difference]: Without dead ends: 1666 [2022-01-18 06:52:42,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:52:42,978 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:42,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 202 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 250 Unchecked, 0.1s Time] [2022-01-18 06:52:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-01-18 06:52:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1487. [2022-01-18 06:52:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.2476446837146704) internal successors, (3340), 1486 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3340 transitions. [2022-01-18 06:52:42,995 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3340 transitions. Word has length 32 [2022-01-18 06:52:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:42,995 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 3340 transitions. [2022-01-18 06:52:42,995 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) [2022-01-18 06:52:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3340 transitions. [2022-01-18 06:52:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:42,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:42,996 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] [2022-01-18 06:52:43,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 06:52:43,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 06:52:43,199 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash 809339119, now seen corresponding path program 25 times [2022-01-18 06:52:43,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550633538] [2022-01-18 06:52:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:43,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:43,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550633538] [2022-01-18 06:52:43,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550633538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326927426] [2022-01-18 06:52:43,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:43,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:43,402 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:43,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:52:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:43,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:43,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 06:52:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:43,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:43,750 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 [2022-01-18 06:52:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:43,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:43,992 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:43,992 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 [2022-01-18 06:52:44,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:44,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326927426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:44,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:44,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 06:52:44,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77065309] [2022-01-18 06:52:44,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:44,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:44,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:44,088 INFO L87 Difference]: Start difference. First operand 1487 states and 3340 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:44,382 INFO L93 Difference]: Finished difference Result 1626 states and 3621 transitions. [2022-01-18 06:52:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:52:44,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:44,385 INFO L225 Difference]: With dead ends: 1626 [2022-01-18 06:52:44,385 INFO L226 Difference]: Without dead ends: 1610 [2022-01-18 06:52:44,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:52:44,386 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:44,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 169 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-01-18 06:52:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-01-18 06:52:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1486. [2022-01-18 06:52:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 2.2471380471380473) internal successors, (3337), 1485 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3337 transitions. [2022-01-18 06:52:44,403 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3337 transitions. Word has length 32 [2022-01-18 06:52:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:44,403 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 3337 transitions. [2022-01-18 06:52:44,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3337 transitions. [2022-01-18 06:52:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:44,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:44,404 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] [2022-01-18 06:52:44,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 06:52:44,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 06:52:44,610 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1602633313, now seen corresponding path program 26 times [2022-01-18 06:52:44,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:44,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845856826] [2022-01-18 06:52:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:44,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:44,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:44,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845856826] [2022-01-18 06:52:44,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845856826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:44,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140070177] [2022-01-18 06:52:44,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:44,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:44,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:44,801 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:44,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:52:44,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:44,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:45,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:45,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:45,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:45,180 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 [2022-01-18 06:52:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:45,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:45,416 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:45,416 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 [2022-01-18 06:52:45,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:45,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140070177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:45,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:45,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 28 [2022-01-18 06:52:45,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157530917] [2022-01-18 06:52:45,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:45,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:45,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:45,530 INFO L87 Difference]: Start difference. First operand 1486 states and 3337 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) [2022-01-18 06:52:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:45,753 INFO L93 Difference]: Finished difference Result 1659 states and 3686 transitions. [2022-01-18 06:52:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:52:45,753 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 [2022-01-18 06:52:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:45,756 INFO L225 Difference]: With dead ends: 1659 [2022-01-18 06:52:45,756 INFO L226 Difference]: Without dead ends: 1645 [2022-01-18 06:52:45,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:52:45,757 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:45,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 160 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 198 Unchecked, 0.1s Time] [2022-01-18 06:52:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-01-18 06:52:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1494. [2022-01-18 06:52:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.245813797722706) internal successors, (3353), 1493 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3353 transitions. [2022-01-18 06:52:45,775 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3353 transitions. Word has length 32 [2022-01-18 06:52:45,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:45,775 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 3353 transitions. [2022-01-18 06:52:45,775 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) [2022-01-18 06:52:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3353 transitions. [2022-01-18 06:52:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:45,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:45,777 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] [2022-01-18 06:52:45,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:45,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 06:52:45,977 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -117543987, now seen corresponding path program 27 times [2022-01-18 06:52:45,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:45,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379768042] [2022-01-18 06:52:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:45,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:46,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379768042] [2022-01-18 06:52:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379768042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321957502] [2022-01-18 06:52:46,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:46,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:46,172 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:46,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:52:46,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:46,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:52:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:46,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:46,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:46,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:46,499 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 [2022-01-18 06:52:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:46,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:47,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:47,750 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 [2022-01-18 06:52:47,820 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 [2022-01-18 06:52:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:47,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321957502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:47,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:47,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-01-18 06:52:47,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855815942] [2022-01-18 06:52:47,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:47,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 06:52:47,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 06:52:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:52:47,853 INFO L87 Difference]: Start difference. First operand 1494 states and 3353 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 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) [2022-01-18 06:52:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:48,249 INFO L93 Difference]: Finished difference Result 1596 states and 3554 transitions. [2022-01-18 06:52:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 06:52:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 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 32 [2022-01-18 06:52:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:48,252 INFO L225 Difference]: With dead ends: 1596 [2022-01-18 06:52:48,252 INFO L226 Difference]: Without dead ends: 1563 [2022-01-18 06:52:48,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 06:52:48,253 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:48,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 252 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 206 Invalid, 0 Unknown, 433 Unchecked, 0.1s Time] [2022-01-18 06:52:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-01-18 06:52:48,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1505. [2022-01-18 06:52:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.2513297872340425) internal successors, (3386), 1504 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3386 transitions. [2022-01-18 06:52:48,269 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3386 transitions. Word has length 32 [2022-01-18 06:52:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:48,269 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 3386 transitions. [2022-01-18 06:52:48,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 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) [2022-01-18 06:52:48,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3386 transitions. [2022-01-18 06:52:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:48,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:48,271 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] [2022-01-18 06:52:48,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 06:52:48,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 06:52:48,472 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:48,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1140541965, now seen corresponding path program 28 times [2022-01-18 06:52:48,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:48,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374315144] [2022-01-18 06:52:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:48,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:48,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:48,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374315144] [2022-01-18 06:52:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374315144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:48,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935868011] [2022-01-18 06:52:48,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:48,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:48,654 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:48,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:52:48,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:48,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:48,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:49,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:49,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:49,052 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 [2022-01-18 06:52:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:49,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:49,309 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:49,310 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 [2022-01-18 06:52:49,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935868011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:49,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:49,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-18 06:52:49,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864942035] [2022-01-18 06:52:49,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:49,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:49,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:49,450 INFO L87 Difference]: Start difference. First operand 1505 states and 3386 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) [2022-01-18 06:52:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:49,685 INFO L93 Difference]: Finished difference Result 1850 states and 4103 transitions. [2022-01-18 06:52:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:52:49,685 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 [2022-01-18 06:52:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:49,688 INFO L225 Difference]: With dead ends: 1850 [2022-01-18 06:52:49,688 INFO L226 Difference]: Without dead ends: 1756 [2022-01-18 06:52:49,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:52:49,689 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:49,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 264 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 234 Invalid, 0 Unknown, 372 Unchecked, 0.1s Time] [2022-01-18 06:52:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-01-18 06:52:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1578. [2022-01-18 06:52:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.25428027901078) internal successors, (3555), 1577 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 3555 transitions. [2022-01-18 06:52:49,707 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 3555 transitions. Word has length 32 [2022-01-18 06:52:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:49,708 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 3555 transitions. [2022-01-18 06:52:49,708 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) [2022-01-18 06:52:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 3555 transitions. [2022-01-18 06:52:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:49,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:49,709 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] [2022-01-18 06:52:49,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 06:52:49,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:49,925 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:49,925 INFO L85 PathProgramCache]: Analyzing trace with hash 968255547, now seen corresponding path program 29 times [2022-01-18 06:52:49,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:49,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596962749] [2022-01-18 06:52:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:49,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:50,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596962749] [2022-01-18 06:52:50,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596962749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:50,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292115085] [2022-01-18 06:52:50,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:50,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:50,087 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:50,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 06:52:50,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:50,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:50,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:50,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:50,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:50,399 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 [2022-01-18 06:52:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:50,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:50,676 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:50,677 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 [2022-01-18 06:52:50,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:50,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292115085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:50,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:50,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-18 06:52:50,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762676612] [2022-01-18 06:52:50,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:52:50,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:52:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:52:50,813 INFO L87 Difference]: Start difference. First operand 1578 states and 3555 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:51,064 INFO L93 Difference]: Finished difference Result 2252 states and 4991 transitions. [2022-01-18 06:52:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 06:52:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:52:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:51,069 INFO L225 Difference]: With dead ends: 2252 [2022-01-18 06:52:51,069 INFO L226 Difference]: Without dead ends: 2140 [2022-01-18 06:52:51,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:52:51,069 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:51,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 240 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 243 Invalid, 0 Unknown, 575 Unchecked, 0.1s Time] [2022-01-18 06:52:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-01-18 06:52:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1707. [2022-01-18 06:52:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 1706 states have (on average 2.2626025791324738) internal successors, (3860), 1706 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 3860 transitions. [2022-01-18 06:52:51,092 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 3860 transitions. Word has length 32 [2022-01-18 06:52:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:51,093 INFO L470 AbstractCegarLoop]: Abstraction has 1707 states and 3860 transitions. [2022-01-18 06:52:51,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 3860 transitions. [2022-01-18 06:52:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:51,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:51,095 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] [2022-01-18 06:52:51,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:51,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:51,310 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1980948079, now seen corresponding path program 30 times [2022-01-18 06:52:51,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:51,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779052812] [2022-01-18 06:52:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:51,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:51,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:51,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779052812] [2022-01-18 06:52:51,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779052812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:51,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211743744] [2022-01-18 06:52:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:51,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:51,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:51,479 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:51,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 06:52:51,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:52:51,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:51,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:51,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:52:51,821 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 06:52:51,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-01-18 06:52:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:51,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:52,090 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:52,090 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 [2022-01-18 06:52:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:52,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211743744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:52,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:52,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-01-18 06:52:52,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037063072] [2022-01-18 06:52:52,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:52,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:52:52,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:52,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:52:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:52:52,226 INFO L87 Difference]: Start difference. First operand 1707 states and 3860 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-01-18 06:52:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:52,814 INFO L93 Difference]: Finished difference Result 2522 states and 5549 transitions. [2022-01-18 06:52:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:52:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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 32 [2022-01-18 06:52:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:52,819 INFO L225 Difference]: With dead ends: 2522 [2022-01-18 06:52:52,819 INFO L226 Difference]: Without dead ends: 2400 [2022-01-18 06:52:52,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:52:52,819 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 248 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:52,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 203 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 471 Invalid, 0 Unknown, 320 Unchecked, 0.2s Time] [2022-01-18 06:52:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-01-18 06:52:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1538. [2022-01-18 06:52:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.2485361093038385) internal successors, (3456), 1537 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3456 transitions. [2022-01-18 06:52:52,841 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3456 transitions. Word has length 32 [2022-01-18 06:52:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:52,841 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 3456 transitions. [2022-01-18 06:52:52,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 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) [2022-01-18 06:52:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3456 transitions. [2022-01-18 06:52:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:52,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:52,842 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] [2022-01-18 06:52:52,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:53,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 06:52:53,058 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1077914535, now seen corresponding path program 31 times [2022-01-18 06:52:53,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:53,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545481377] [2022-01-18 06:52:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:53,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:53,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545481377] [2022-01-18 06:52:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545481377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:53,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560095708] [2022-01-18 06:52:53,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:53,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:53,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:53,233 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:53,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:52:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:53,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:53,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:53,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:53,611 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 [2022-01-18 06:52:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:53,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:53,879 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:53,879 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 [2022-01-18 06:52:54,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:54,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560095708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:54,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:54,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:52:54,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196625432] [2022-01-18 06:52:54,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:54,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:52:54,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:52:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:52:54,099 INFO L87 Difference]: Start difference. First operand 1538 states and 3456 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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) [2022-01-18 06:52:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:55,007 INFO L93 Difference]: Finished difference Result 2813 states and 6181 transitions. [2022-01-18 06:52:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:52:55,007 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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 [2022-01-18 06:52:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:55,011 INFO L225 Difference]: With dead ends: 2813 [2022-01-18 06:52:55,011 INFO L226 Difference]: Without dead ends: 2550 [2022-01-18 06:52:55,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 06:52:55,011 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 288 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:55,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 439 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 629 Invalid, 0 Unknown, 1159 Unchecked, 0.2s Time] [2022-01-18 06:52:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2022-01-18 06:52:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1860. [2022-01-18 06:52:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 2.2501344809037116) internal successors, (4183), 1859 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 4183 transitions. [2022-01-18 06:52:55,034 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 4183 transitions. Word has length 32 [2022-01-18 06:52:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:55,034 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 4183 transitions. [2022-01-18 06:52:55,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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) [2022-01-18 06:52:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 4183 transitions. [2022-01-18 06:52:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:55,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:55,036 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] [2022-01-18 06:52:55,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 06:52:55,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:55,240 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash 282445069, now seen corresponding path program 32 times [2022-01-18 06:52:55,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:55,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237969708] [2022-01-18 06:52:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:55,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:55,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:55,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237969708] [2022-01-18 06:52:55,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237969708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:55,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738655801] [2022-01-18 06:52:55,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:55,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:55,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:55,414 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:55,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 06:52:55,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:55,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:55,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:55,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:55,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:55,791 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 [2022-01-18 06:52:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:55,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:56,040 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:56,040 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 [2022-01-18 06:52:56,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:52:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:56,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738655801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:56,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:56,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 06:52:56,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103345084] [2022-01-18 06:52:56,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:56,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:56,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:56,231 INFO L87 Difference]: Start difference. First operand 1860 states and 4183 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:52:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:56,708 INFO L93 Difference]: Finished difference Result 2130 states and 4721 transitions. [2022-01-18 06:52:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 06:52:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 [2022-01-18 06:52:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:56,711 INFO L225 Difference]: With dead ends: 2130 [2022-01-18 06:52:56,711 INFO L226 Difference]: Without dead ends: 2102 [2022-01-18 06:52:56,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:52:56,713 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:56,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 317 Invalid, 0 Unknown, 388 Unchecked, 0.1s Time] [2022-01-18 06:52:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-01-18 06:52:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1894. [2022-01-18 06:52:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.2519809825673534) internal successors, (4263), 1893 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 4263 transitions. [2022-01-18 06:52:56,735 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 4263 transitions. Word has length 32 [2022-01-18 06:52:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:56,735 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 4263 transitions. [2022-01-18 06:52:56,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:52:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 4263 transitions. [2022-01-18 06:52:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:56,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:56,738 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] [2022-01-18 06:52:56,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:56,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:56,951 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 458576657, now seen corresponding path program 33 times [2022-01-18 06:52:56,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:56,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904392577] [2022-01-18 06:52:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:56,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:57,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:57,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904392577] [2022-01-18 06:52:57,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904392577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:57,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125584035] [2022-01-18 06:52:57,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:57,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:57,160 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:57,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 06:52:57,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:57,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:57,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:57,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:57,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:57,507 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 [2022-01-18 06:52:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:57,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:57,765 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:57,765 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 [2022-01-18 06:52:57,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:52:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:57,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125584035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:57,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 06:52:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135566039] [2022-01-18 06:52:57,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:57,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:57,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:57,939 INFO L87 Difference]: Start difference. First operand 1894 states and 4263 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:58,581 INFO L93 Difference]: Finished difference Result 2381 states and 5316 transitions. [2022-01-18 06:52:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:52:58,581 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:52:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:58,584 INFO L225 Difference]: With dead ends: 2381 [2022-01-18 06:52:58,584 INFO L226 Difference]: Without dead ends: 2304 [2022-01-18 06:52:58,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 06:52:58,585 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 160 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:58,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 268 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 409 Invalid, 0 Unknown, 444 Unchecked, 0.1s Time] [2022-01-18 06:52:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-01-18 06:52:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2022. [2022-01-18 06:52:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.256308758040574) internal successors, (4560), 2021 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 4560 transitions. [2022-01-18 06:52:58,611 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 4560 transitions. Word has length 32 [2022-01-18 06:52:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:58,611 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 4560 transitions. [2022-01-18 06:52:58,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 4560 transitions. [2022-01-18 06:52:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:52:58,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:58,616 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] [2022-01-18 06:52:58,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:58,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 06:52:58,831 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:52:58,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash -362600081, now seen corresponding path program 34 times [2022-01-18 06:52:58,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:58,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857813786] [2022-01-18 06:52:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:58,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:59,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857813786] [2022-01-18 06:52:59,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857813786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332789071] [2022-01-18 06:52:59,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:59,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:59,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:59,035 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:52:59,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 06:52:59,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:59,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:52:59,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:59,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:59,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:52:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:59,367 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 [2022-01-18 06:52:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:59,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:59,631 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:52:59,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 06:52:59,731 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 [2022-01-18 06:52:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:59,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332789071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:59,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:59,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 06:52:59,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105202844] [2022-01-18 06:52:59,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:59,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:52:59,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:52:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:52:59,763 INFO L87 Difference]: Start difference. First operand 2022 states and 4560 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:00,136 INFO L93 Difference]: Finished difference Result 2174 states and 4888 transitions. [2022-01-18 06:53:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:53:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:53:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:00,139 INFO L225 Difference]: With dead ends: 2174 [2022-01-18 06:53:00,139 INFO L226 Difference]: Without dead ends: 2154 [2022-01-18 06:53:00,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:53:00,140 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:00,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 159 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 231 Invalid, 0 Unknown, 326 Unchecked, 0.1s Time] [2022-01-18 06:53:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2022-01-18 06:53:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2043. [2022-01-18 06:53:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 2.254162585700294) internal successors, (4603), 2042 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 4603 transitions. [2022-01-18 06:53:00,162 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 4603 transitions. Word has length 32 [2022-01-18 06:53:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:00,162 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 4603 transitions. [2022-01-18 06:53:00,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 4603 transitions. [2022-01-18 06:53:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:00,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:00,164 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] [2022-01-18 06:53:00,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:00,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 06:53:00,380 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1350073971, now seen corresponding path program 35 times [2022-01-18 06:53:00,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:00,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594477] [2022-01-18 06:53:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:00,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:00,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594477] [2022-01-18 06:53:00,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:00,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721129417] [2022-01-18 06:53:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:53:00,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:00,574 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:00,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 06:53:00,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:53:00,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:00,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:53:00,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:00,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:00,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:53:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:00,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:00,984 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 [2022-01-18 06:53:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:00,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:01,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:01,252 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 [2022-01-18 06:53:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:01,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721129417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:01,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:01,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 36 [2022-01-18 06:53:01,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325437089] [2022-01-18 06:53:01,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:01,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 06:53:01,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 06:53:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:53:01,449 INFO L87 Difference]: Start difference. First operand 2043 states and 4603 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-01-18 06:53:02,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:02,330 INFO L93 Difference]: Finished difference Result 2682 states and 5975 transitions. [2022-01-18 06:53:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:53:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 [2022-01-18 06:53:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:02,334 INFO L225 Difference]: With dead ends: 2682 [2022-01-18 06:53:02,334 INFO L226 Difference]: Without dead ends: 2649 [2022-01-18 06:53:02,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=650, Invalid=3132, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 06:53:02,335 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 223 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:02,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 216 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 536 Invalid, 0 Unknown, 521 Unchecked, 0.2s Time] [2022-01-18 06:53:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-01-18 06:53:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2201. [2022-01-18 06:53:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.255) internal successors, (4961), 2200 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 4961 transitions. [2022-01-18 06:53:02,363 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 4961 transitions. Word has length 32 [2022-01-18 06:53:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:02,363 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 4961 transitions. [2022-01-18 06:53:02,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-01-18 06:53:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 4961 transitions. [2022-01-18 06:53:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:02,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:02,366 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] [2022-01-18 06:53:02,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:02,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 06:53:02,579 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:02,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1516422259, now seen corresponding path program 36 times [2022-01-18 06:53:02,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:02,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847313655] [2022-01-18 06:53:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:02,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:02,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847313655] [2022-01-18 06:53:02,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847313655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650213905] [2022-01-18 06:53:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:53:02,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:02,775 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:02,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 06:53:02,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:53:02,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:53:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:02,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:02,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:53:03,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:03,165 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 [2022-01-18 06:53:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:03,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:03,441 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:03,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-01-18 06:53:03,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:53:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:03,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650213905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:03,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:03,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:53:03,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062192593] [2022-01-18 06:53:03,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:03,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:53:03,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:53:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:03,596 INFO L87 Difference]: Start difference. First operand 2201 states and 4961 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2022-01-18 06:53:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:04,033 INFO L93 Difference]: Finished difference Result 2948 states and 6539 transitions. [2022-01-18 06:53:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:53:04,033 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 [2022-01-18 06:53:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:04,036 INFO L225 Difference]: With dead ends: 2948 [2022-01-18 06:53:04,037 INFO L226 Difference]: Without dead ends: 2823 [2022-01-18 06:53:04,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:53:04,037 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:04,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 316 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 423 Invalid, 0 Unknown, 725 Unchecked, 0.1s Time] [2022-01-18 06:53:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-01-18 06:53:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2454. [2022-01-18 06:53:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 2.2592743579290664) internal successors, (5542), 2453 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 5542 transitions. [2022-01-18 06:53:04,066 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 5542 transitions. Word has length 32 [2022-01-18 06:53:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:04,067 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 5542 transitions. [2022-01-18 06:53:04,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2022-01-18 06:53:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 5542 transitions. [2022-01-18 06:53:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:04,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:04,070 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] [2022-01-18 06:53:04,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:04,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:04,283 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1972305753, now seen corresponding path program 37 times [2022-01-18 06:53:04,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:04,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658248722] [2022-01-18 06:53:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:04,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:04,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658248722] [2022-01-18 06:53:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658248722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232865093] [2022-01-18 06:53:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:53:04,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:04,502 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:04,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 06:53:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:04,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:04,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:04,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:04,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 06:53:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:04,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:04,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-01-18 06:53:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:04,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:05,107 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:05,107 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 [2022-01-18 06:53:05,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:53:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:05,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232865093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:05,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:05,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 06:53:05,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809015296] [2022-01-18 06:53:05,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:05,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:53:05,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:05,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:53:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:53:05,248 INFO L87 Difference]: Start difference. First operand 2454 states and 5542 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:05,608 INFO L93 Difference]: Finished difference Result 4067 states and 9106 transitions. [2022-01-18 06:53:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:53:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:53:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:05,614 INFO L225 Difference]: With dead ends: 4067 [2022-01-18 06:53:05,615 INFO L226 Difference]: Without dead ends: 4040 [2022-01-18 06:53:05,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:53:05,615 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 115 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:05,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 305 Invalid, 0 Unknown, 385 Unchecked, 0.1s Time] [2022-01-18 06:53:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-01-18 06:53:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 2635. [2022-01-18 06:53:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.2649962034927866) internal successors, (5966), 2634 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 5966 transitions. [2022-01-18 06:53:05,653 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 5966 transitions. Word has length 32 [2022-01-18 06:53:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 5966 transitions. [2022-01-18 06:53:05,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 5966 transitions. [2022-01-18 06:53:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:05,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:05,657 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] [2022-01-18 06:53:05,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 06:53:05,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 06:53:05,858 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:05,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash 804520611, now seen corresponding path program 38 times [2022-01-18 06:53:05,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:05,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659492857] [2022-01-18 06:53:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:05,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:06,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659492857] [2022-01-18 06:53:06,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659492857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096534917] [2022-01-18 06:53:06,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:53:06,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:06,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:06,057 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:06,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 06:53:06,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:53:06,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:53:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:06,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:06,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:53:06,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:06,455 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 [2022-01-18 06:53:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:06,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:06,703 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:06,703 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 [2022-01-18 06:53:06,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:53:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:06,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096534917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:06,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:06,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 06:53:06,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013619483] [2022-01-18 06:53:06,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:06,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:53:06,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:53:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:53:06,843 INFO L87 Difference]: Start difference. First operand 2635 states and 5966 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:07,211 INFO L93 Difference]: Finished difference Result 3211 states and 7172 transitions. [2022-01-18 06:53:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:53:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:53:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:07,215 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 06:53:07,215 INFO L226 Difference]: Without dead ends: 3145 [2022-01-18 06:53:07,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:53:07,216 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 132 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 617 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:07,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 241 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 341 Invalid, 0 Unknown, 617 Unchecked, 0.1s Time] [2022-01-18 06:53:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-01-18 06:53:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2696. [2022-01-18 06:53:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.2608534322820035) internal successors, (6093), 2695 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6093 transitions. [2022-01-18 06:53:07,247 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6093 transitions. Word has length 32 [2022-01-18 06:53:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:07,247 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 6093 transitions. [2022-01-18 06:53:07,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6093 transitions. [2022-01-18 06:53:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:07,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:07,250 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] [2022-01-18 06:53:07,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 06:53:07,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 06:53:07,451 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash 349061555, now seen corresponding path program 39 times [2022-01-18 06:53:07,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:07,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99157729] [2022-01-18 06:53:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:07,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:07,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99157729] [2022-01-18 06:53:07,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99157729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:07,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111461046] [2022-01-18 06:53:07,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:53:07,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:07,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:07,626 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:07,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 06:53:07,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:53:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 06:53:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:07,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:07,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:53:08,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:08,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:08,060 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 20 treesize of output 28 [2022-01-18 06:53:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:08,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:08,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:08,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:08,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:08,746 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 33 treesize of output 37 [2022-01-18 06:53:08,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:08,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-18 06:53:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:09,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111461046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:09,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:09,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-01-18 06:53:09,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356872003] [2022-01-18 06:53:09,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:09,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 06:53:09,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 06:53:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 06:53:09,055 INFO L87 Difference]: Start difference. First operand 2696 states and 6093 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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) [2022-01-18 06:53:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:10,618 INFO L93 Difference]: Finished difference Result 3668 states and 8214 transitions. [2022-01-18 06:53:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 06:53:10,619 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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 32 [2022-01-18 06:53:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:10,623 INFO L225 Difference]: With dead ends: 3668 [2022-01-18 06:53:10,623 INFO L226 Difference]: Without dead ends: 3548 [2022-01-18 06:53:10,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1004, Invalid=5002, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:53:10,624 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 299 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:10,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 603 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 313 Invalid, 0 Unknown, 1145 Unchecked, 0.1s Time] [2022-01-18 06:53:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2022-01-18 06:53:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 2929. [2022-01-18 06:53:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 2.2575136612021858) internal successors, (6610), 2928 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 6610 transitions. [2022-01-18 06:53:10,659 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 6610 transitions. Word has length 32 [2022-01-18 06:53:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:10,659 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 6610 transitions. [2022-01-18 06:53:10,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 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) [2022-01-18 06:53:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 6610 transitions. [2022-01-18 06:53:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:10,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:10,662 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] [2022-01-18 06:53:10,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 06:53:10,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:10,871 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2145543437, now seen corresponding path program 40 times [2022-01-18 06:53:10,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:10,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112012763] [2022-01-18 06:53:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:10,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:11,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:11,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112012763] [2022-01-18 06:53:11,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112012763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:11,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203105636] [2022-01-18 06:53:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:53:11,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:11,069 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:11,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 06:53:11,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:53:11,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:11,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:11,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-01-18 06:53:11,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:11,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:11,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-01-18 06:53:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:11,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:11,683 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:11,683 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 [2022-01-18 06:53:11,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:53:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203105636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:11,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 06:53:11,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667943569] [2022-01-18 06:53:11,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:11,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:53:11,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:53:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:53:11,865 INFO L87 Difference]: Start difference. First operand 2929 states and 6610 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:53:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:12,411 INFO L93 Difference]: Finished difference Result 4509 states and 10100 transitions. [2022-01-18 06:53:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 06:53:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 [2022-01-18 06:53:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:12,417 INFO L225 Difference]: With dead ends: 4509 [2022-01-18 06:53:12,417 INFO L226 Difference]: Without dead ends: 4467 [2022-01-18 06:53:12,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:53:12,418 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 161 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:12,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 296 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 406 Invalid, 0 Unknown, 514 Unchecked, 0.2s Time] [2022-01-18 06:53:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-01-18 06:53:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3295. [2022-01-18 06:53:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.2726168791742563) internal successors, (7486), 3294 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 7486 transitions. [2022-01-18 06:53:12,460 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 7486 transitions. Word has length 32 [2022-01-18 06:53:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:12,460 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 7486 transitions. [2022-01-18 06:53:12,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:53:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 7486 transitions. [2022-01-18 06:53:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:12,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:12,464 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] [2022-01-18 06:53:12,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 06:53:12,665 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1639171119, now seen corresponding path program 41 times [2022-01-18 06:53:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:12,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547729298] [2022-01-18 06:53:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:12,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:12,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:12,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547729298] [2022-01-18 06:53:12,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547729298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624165989] [2022-01-18 06:53:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:53:12,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:12,826 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:12,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 06:53:12,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:53:12,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:12,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:53:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:13,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:13,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:53:13,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:13,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:13,221 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 [2022-01-18 06:53:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:13,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:13,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:13,471 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 [2022-01-18 06:53:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:13,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624165989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:13,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:13,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-18 06:53:13,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164102186] [2022-01-18 06:53:13,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:13,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 06:53:13,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 06:53:13,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:53:13,815 INFO L87 Difference]: Start difference. First operand 3295 states and 7486 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) [2022-01-18 06:53:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:15,032 INFO L93 Difference]: Finished difference Result 5882 states and 13176 transitions. [2022-01-18 06:53:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:53:15,033 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 [2022-01-18 06:53:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:15,039 INFO L225 Difference]: With dead ends: 5882 [2022-01-18 06:53:15,039 INFO L226 Difference]: Without dead ends: 5674 [2022-01-18 06:53:15,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=867, Invalid=4389, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:53:15,040 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:15,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 390 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 719 Invalid, 0 Unknown, 517 Unchecked, 0.3s Time] [2022-01-18 06:53:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2022-01-18 06:53:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 3749. [2022-01-18 06:53:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 2.2716115261472787) internal successors, (8514), 3748 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 8514 transitions. [2022-01-18 06:53:15,091 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 8514 transitions. Word has length 32 [2022-01-18 06:53:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:15,092 INFO L470 AbstractCegarLoop]: Abstraction has 3749 states and 8514 transitions. [2022-01-18 06:53:15,092 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) [2022-01-18 06:53:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 8514 transitions. [2022-01-18 06:53:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:15,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:15,096 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] [2022-01-18 06:53:15,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 06:53:15,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:15,304 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:15,304 INFO L85 PathProgramCache]: Analyzing trace with hash 251124075, now seen corresponding path program 42 times [2022-01-18 06:53:15,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:15,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604419761] [2022-01-18 06:53:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:15,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:15,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:15,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604419761] [2022-01-18 06:53:15,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604419761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:15,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772108224] [2022-01-18 06:53:15,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:53:15,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:15,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:15,490 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:15,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:53:15,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:15,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 06:53:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:53:15,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:15,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-01-18 06:53:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:15,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:15,899 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 [2022-01-18 06:53:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:15,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:16,137 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:16,138 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 [2022-01-18 06:53:16,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:53:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:16,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772108224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:16,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:16,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 28 [2022-01-18 06:53:16,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646405730] [2022-01-18 06:53:16,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:16,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:53:16,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:16,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:53:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:53:16,293 INFO L87 Difference]: Start difference. First operand 3749 states and 8514 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:16,477 INFO L93 Difference]: Finished difference Result 4320 states and 9774 transitions. [2022-01-18 06:53:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:53:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:53:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:16,482 INFO L225 Difference]: With dead ends: 4320 [2022-01-18 06:53:16,483 INFO L226 Difference]: Without dead ends: 4280 [2022-01-18 06:53:16,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:53:16,483 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:16,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 197 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2022-01-18 06:53:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2022-01-18 06:53:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 3804. [2022-01-18 06:53:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 2.2713647120694187) internal successors, (8638), 3803 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 8638 transitions. [2022-01-18 06:53:16,528 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 8638 transitions. Word has length 32 [2022-01-18 06:53:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:16,528 INFO L470 AbstractCegarLoop]: Abstraction has 3804 states and 8638 transitions. [2022-01-18 06:53:16,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 8638 transitions. [2022-01-18 06:53:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:16,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:16,533 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] [2022-01-18 06:53:16,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 06:53:16,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:16,733 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1453373471, now seen corresponding path program 43 times [2022-01-18 06:53:16,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877185170] [2022-01-18 06:53:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:16,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:16,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877185170] [2022-01-18 06:53:16,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877185170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:16,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714503592] [2022-01-18 06:53:16,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:53:16,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:16,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:16,917 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:16,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 06:53:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:16,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:17,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:17,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:53:17,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:17,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:17,310 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 [2022-01-18 06:53:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:17,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:17,549 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:17,549 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 [2022-01-18 06:53:17,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:53:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:17,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714503592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:17,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:17,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 29 [2022-01-18 06:53:17,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791053074] [2022-01-18 06:53:17,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:17,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:53:17,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:17,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:53:17,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:53:17,756 INFO L87 Difference]: Start difference. First operand 3804 states and 8638 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:53:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:18,138 INFO L93 Difference]: Finished difference Result 4154 states and 9383 transitions. [2022-01-18 06:53:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:53:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 [2022-01-18 06:53:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:18,143 INFO L225 Difference]: With dead ends: 4154 [2022-01-18 06:53:18,143 INFO L226 Difference]: Without dead ends: 4143 [2022-01-18 06:53:18,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:53:18,144 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:18,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 182 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 228 Invalid, 0 Unknown, 314 Unchecked, 0.1s Time] [2022-01-18 06:53:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-01-18 06:53:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3797. [2022-01-18 06:53:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 2.2710748155953637) internal successors, (8621), 3796 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 8621 transitions. [2022-01-18 06:53:18,188 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 8621 transitions. Word has length 32 [2022-01-18 06:53:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:18,188 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 8621 transitions. [2022-01-18 06:53:18,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-01-18 06:53:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 8621 transitions. [2022-01-18 06:53:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:18,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:18,193 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] [2022-01-18 06:53:18,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:18,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 06:53:18,402 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:18,403 INFO L85 PathProgramCache]: Analyzing trace with hash -62131981, now seen corresponding path program 44 times [2022-01-18 06:53:18,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:18,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721340988] [2022-01-18 06:53:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:18,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:18,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:18,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721340988] [2022-01-18 06:53:18,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721340988] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:18,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137415838] [2022-01-18 06:53:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:53:18,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:18,596 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:18,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 06:53:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:53:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:18,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:18,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:18,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-18 06:53:19,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:19,074 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 [2022-01-18 06:53:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:19,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:19,333 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:19,334 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 06:53:19,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:53:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137415838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:19,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:19,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:53:19,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294686837] [2022-01-18 06:53:19,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:19,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:53:19,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:53:19,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:19,538 INFO L87 Difference]: Start difference. First operand 3797 states and 8621 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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) [2022-01-18 06:53:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:20,231 INFO L93 Difference]: Finished difference Result 4560 states and 10241 transitions. [2022-01-18 06:53:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 06:53:20,231 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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 [2022-01-18 06:53:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:20,237 INFO L225 Difference]: With dead ends: 4560 [2022-01-18 06:53:20,237 INFO L226 Difference]: Without dead ends: 4520 [2022-01-18 06:53:20,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 06:53:20,237 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 162 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:20,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 263 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 300 Invalid, 0 Unknown, 545 Unchecked, 0.1s Time] [2022-01-18 06:53:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-01-18 06:53:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3870. [2022-01-18 06:53:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 2.271387955544068) internal successors, (8788), 3869 states have internal predecessors, (8788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 8788 transitions. [2022-01-18 06:53:20,283 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 8788 transitions. Word has length 32 [2022-01-18 06:53:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:20,283 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 8788 transitions. [2022-01-18 06:53:20,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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) [2022-01-18 06:53:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 8788 transitions. [2022-01-18 06:53:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:20,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:20,288 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] [2022-01-18 06:53:20,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 06:53:20,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 06:53:20,489 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1842733581, now seen corresponding path program 45 times [2022-01-18 06:53:20,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:20,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47892156] [2022-01-18 06:53:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:20,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:20,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47892156] [2022-01-18 06:53:20,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47892156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525810317] [2022-01-18 06:53:20,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:53:20,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:20,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:20,687 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:20,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 06:53:20,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:53:20,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:20,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:20,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:20,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:53:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:21,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:21,056 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 [2022-01-18 06:53:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:21,298 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:21,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 06:53:21,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:53:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:21,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525810317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:21,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:21,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:53:21,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541513217] [2022-01-18 06:53:21,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:21,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:53:21,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:21,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:53:21,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:21,527 INFO L87 Difference]: Start difference. First operand 3870 states and 8788 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:22,032 INFO L93 Difference]: Finished difference Result 5581 states and 12529 transitions. [2022-01-18 06:53:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:53:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:53:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:22,041 INFO L225 Difference]: With dead ends: 5581 [2022-01-18 06:53:22,041 INFO L226 Difference]: Without dead ends: 5455 [2022-01-18 06:53:22,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:53:22,042 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:22,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 286 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 402 Invalid, 0 Unknown, 446 Unchecked, 0.2s Time] [2022-01-18 06:53:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2022-01-18 06:53:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 3920. [2022-01-18 06:53:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 2.2702219954069918) internal successors, (8897), 3919 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 8897 transitions. [2022-01-18 06:53:22,100 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 8897 transitions. Word has length 32 [2022-01-18 06:53:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:22,100 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 8897 transitions. [2022-01-18 06:53:22,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 8897 transitions. [2022-01-18 06:53:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:22,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:22,105 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] [2022-01-18 06:53:22,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:22,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 06:53:22,321 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:22,321 INFO L85 PathProgramCache]: Analyzing trace with hash 778274133, now seen corresponding path program 46 times [2022-01-18 06:53:22,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:22,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812600790] [2022-01-18 06:53:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:22,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:22,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:22,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812600790] [2022-01-18 06:53:22,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812600790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:22,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778241338] [2022-01-18 06:53:22,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:53:22,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:22,544 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:22,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 06:53:22,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:53:22,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:22,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:22,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:22,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:22,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:53:22,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:22,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:22,891 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 [2022-01-18 06:53:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:22,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:23,157 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:23,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 06:53:23,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:53:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:23,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778241338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:23,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:23,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:53:23,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860788841] [2022-01-18 06:53:23,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:23,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:53:23,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:53:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:23,362 INFO L87 Difference]: Start difference. First operand 3920 states and 8897 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:24,011 INFO L93 Difference]: Finished difference Result 5422 states and 12182 transitions. [2022-01-18 06:53:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:53:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:53:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:24,018 INFO L225 Difference]: With dead ends: 5422 [2022-01-18 06:53:24,018 INFO L226 Difference]: Without dead ends: 5349 [2022-01-18 06:53:24,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=1968, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:53:24,019 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:24,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 248 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 442 Invalid, 0 Unknown, 417 Unchecked, 0.2s Time] [2022-01-18 06:53:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2022-01-18 06:53:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4155. [2022-01-18 06:53:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4154 states have (on average 2.2708233028406357) internal successors, (9433), 4154 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 9433 transitions. [2022-01-18 06:53:24,082 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 9433 transitions. Word has length 32 [2022-01-18 06:53:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:24,082 INFO L470 AbstractCegarLoop]: Abstraction has 4155 states and 9433 transitions. [2022-01-18 06:53:24,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 9433 transitions. [2022-01-18 06:53:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:24,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:24,087 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] [2022-01-18 06:53:24,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:24,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:24,299 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash 388256609, now seen corresponding path program 47 times [2022-01-18 06:53:24,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:24,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259642844] [2022-01-18 06:53:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:24,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:24,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259642844] [2022-01-18 06:53:24,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259642844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:24,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486175897] [2022-01-18 06:53:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:53:24,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:24,497 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:24,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 06:53:24,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:53:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:53:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:24,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:24,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:53:24,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:24,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:24,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:24,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2022-01-18 06:53:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:24,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:25,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:25,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:25,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:25,138 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 [2022-01-18 06:53:25,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-01-18 06:53:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:25,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486175897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:25,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:25,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2022-01-18 06:53:25,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82833908] [2022-01-18 06:53:25,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:25,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 06:53:25,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 06:53:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:53:25,465 INFO L87 Difference]: Start difference. First operand 4155 states and 9433 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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) [2022-01-18 06:53:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:26,058 INFO L93 Difference]: Finished difference Result 5217 states and 11757 transitions. [2022-01-18 06:53:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:53:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 [2022-01-18 06:53:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:26,065 INFO L225 Difference]: With dead ends: 5217 [2022-01-18 06:53:26,065 INFO L226 Difference]: Without dead ends: 5195 [2022-01-18 06:53:26,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=2281, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 06:53:26,066 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 119 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:26,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 223 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 406 Invalid, 0 Unknown, 504 Unchecked, 0.1s Time] [2022-01-18 06:53:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2022-01-18 06:53:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 4255. [2022-01-18 06:53:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4255 states, 4254 states have (on average 2.2717442407146216) internal successors, (9664), 4254 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 9664 transitions. [2022-01-18 06:53:26,118 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 9664 transitions. Word has length 32 [2022-01-18 06:53:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:26,119 INFO L470 AbstractCegarLoop]: Abstraction has 4255 states and 9664 transitions. [2022-01-18 06:53:26,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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) [2022-01-18 06:53:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 9664 transitions. [2022-01-18 06:53:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:26,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:26,123 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] [2022-01-18 06:53:26,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:26,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 06:53:26,323 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash 36126075, now seen corresponding path program 48 times [2022-01-18 06:53:26,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:26,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87892924] [2022-01-18 06:53:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:26,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:26,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87892924] [2022-01-18 06:53:26,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87892924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905496864] [2022-01-18 06:53:26,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:53:26,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:26,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:26,502 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:26,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 06:53:26,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:53:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:26,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:26,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:53:26,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:26,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:26,832 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 [2022-01-18 06:53:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:26,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:27,086 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:27,086 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 [2022-01-18 06:53:27,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:53:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:27,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905496864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:27,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:27,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:53:27,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510102985] [2022-01-18 06:53:27,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:27,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:53:27,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:53:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:27,225 INFO L87 Difference]: Start difference. First operand 4255 states and 9664 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:27,975 INFO L93 Difference]: Finished difference Result 6892 states and 15481 transitions. [2022-01-18 06:53:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 06:53:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:53:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:27,985 INFO L225 Difference]: With dead ends: 6892 [2022-01-18 06:53:27,985 INFO L226 Difference]: Without dead ends: 6717 [2022-01-18 06:53:27,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 14 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=2156, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:53:27,986 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:27,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 286 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 336 Invalid, 0 Unknown, 526 Unchecked, 0.1s Time] [2022-01-18 06:53:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-01-18 06:53:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 4460. [2022-01-18 06:53:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.270015698587127) internal successors, (10122), 4459 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 10122 transitions. [2022-01-18 06:53:28,052 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 10122 transitions. Word has length 32 [2022-01-18 06:53:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:28,052 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 10122 transitions. [2022-01-18 06:53:28,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 10122 transitions. [2022-01-18 06:53:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:28,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:28,057 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] [2022-01-18 06:53:28,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 06:53:28,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 06:53:28,258 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1637833507, now seen corresponding path program 49 times [2022-01-18 06:53:28,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:28,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939714787] [2022-01-18 06:53:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:28,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:28,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939714787] [2022-01-18 06:53:28,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939714787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575288378] [2022-01-18 06:53:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:53:28,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:28,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:28,449 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:28,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 06:53:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:28,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:28,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:28,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:28,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:53:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:28,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:28,800 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 [2022-01-18 06:53:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:28,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:29,057 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:29,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-01-18 06:53:29,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:53:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:29,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575288378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:29,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:29,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:53:29,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416407074] [2022-01-18 06:53:29,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:29,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:53:29,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:53:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:29,195 INFO L87 Difference]: Start difference. First operand 4460 states and 10122 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:29,902 INFO L93 Difference]: Finished difference Result 6917 states and 15565 transitions. [2022-01-18 06:53:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:53:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:53:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:29,912 INFO L225 Difference]: With dead ends: 6917 [2022-01-18 06:53:29,912 INFO L226 Difference]: Without dead ends: 6736 [2022-01-18 06:53:29,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:53:29,913 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 142 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:29,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 329 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 688 Invalid, 0 Unknown, 515 Unchecked, 0.2s Time] [2022-01-18 06:53:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2022-01-18 06:53:29,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 4336. [2022-01-18 06:53:29,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 2.2622837370242213) internal successors, (9807), 4335 states have internal predecessors, (9807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 9807 transitions. [2022-01-18 06:53:29,996 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 9807 transitions. Word has length 32 [2022-01-18 06:53:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:29,996 INFO L470 AbstractCegarLoop]: Abstraction has 4336 states and 9807 transitions. [2022-01-18 06:53:29,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 9807 transitions. [2022-01-18 06:53:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:30,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:30,001 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] [2022-01-18 06:53:30,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:30,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:30,215 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash -233872393, now seen corresponding path program 50 times [2022-01-18 06:53:30,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:30,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423826198] [2022-01-18 06:53:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:30,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:30,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423826198] [2022-01-18 06:53:30,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423826198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174358578] [2022-01-18 06:53:30,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:53:30,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:30,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:30,374 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:30,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 06:53:30,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:53:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 06:53:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:30,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:30,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-01-18 06:53:30,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:30,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:30,687 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 [2022-01-18 06:53:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:30,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:30,934 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:30,934 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 [2022-01-18 06:53:31,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-18 06:53:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174358578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:31,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:31,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2022-01-18 06:53:31,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632995659] [2022-01-18 06:53:31,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:31,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:53:31,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:53:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:53:31,067 INFO L87 Difference]: Start difference. First operand 4336 states and 9807 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:31,686 INFO L93 Difference]: Finished difference Result 6011 states and 13443 transitions. [2022-01-18 06:53:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:53:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 06:53:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:31,694 INFO L225 Difference]: With dead ends: 6011 [2022-01-18 06:53:31,695 INFO L226 Difference]: Without dead ends: 5882 [2022-01-18 06:53:31,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:53:31,695 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 348 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 510 Invalid, 0 Unknown, 803 Unchecked, 0.2s Time] [2022-01-18 06:53:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2022-01-18 06:53:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 4195. [2022-01-18 06:53:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 2.259656652360515) internal successors, (9477), 4194 states have internal predecessors, (9477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 9477 transitions. [2022-01-18 06:53:31,750 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 9477 transitions. Word has length 32 [2022-01-18 06:53:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:31,750 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 9477 transitions. [2022-01-18 06:53:31,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 9477 transitions. [2022-01-18 06:53:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 06:53:31,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:31,755 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] [2022-01-18 06:53:31,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 06:53:31,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 06:53:31,955 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 06:53:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash -13819161, now seen corresponding path program 51 times [2022-01-18 06:53:31,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145236442] [2022-01-18 06:53:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:31,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:53:32,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145236442] [2022-01-18 06:53:32,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145236442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417185959] [2022-01-18 06:53:32,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:53:32,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:32,128 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:53:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 06:53:32,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:53:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:53:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:32,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:32,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-01-18 06:53:32,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:32,437 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 [2022-01-18 06:53:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:32,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-01-18 07:05:39,811 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:05:39,815 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 07:05:39,817 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 07:05:39,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 07:05:39,838 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:05:40,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:05:40,019 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 13ms.. [2022-01-18 07:05:40,020 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 07:05:40,020 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 07:05:40,022 INFO L732 BasicCegarLoop]: Path program histogram: [51, 1, 1] [2022-01-18 07:05:40,024 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 07:05:40,024 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 07:05:40,025 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 07:05:40 BasicIcfg [2022-01-18 07:05:40,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 07:05:40,025 INFO L158 Benchmark]: Toolchain (without parser) took 819554.19ms. Allocated memory was 373.3MB in the beginning and 658.5MB in the end (delta: 285.2MB). Free memory was 334.4MB in the beginning and 247.8MB in the end (delta: 86.6MB). Peak memory consumption was 403.3MB. Max. memory is 16.0GB. [2022-01-18 07:05:40,025 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 373.3MB. Free memory is still 335.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:05:40,025 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.66ms. Allocated memory is still 373.3MB. Free memory was 334.4MB in the beginning and 332.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:05:40,025 INFO L158 Benchmark]: Boogie Preprocessor took 14.14ms. Allocated memory is still 373.3MB. Free memory was 332.9MB in the beginning and 332.0MB in the end (delta: 877.5kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:05:40,025 INFO L158 Benchmark]: RCFGBuilder took 214.64ms. Allocated memory is still 373.3MB. Free memory was 331.9MB in the beginning and 322.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 07:05:40,025 INFO L158 Benchmark]: TraceAbstraction took 819302.61ms. Allocated memory was 373.3MB in the beginning and 658.5MB in the end (delta: 285.2MB). Free memory was 321.6MB in the beginning and 247.8MB in the end (delta: 73.8MB). Peak memory consumption was 392.8MB. Max. memory is 16.0GB. [2022-01-18 07:05:40,026 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 373.3MB. Free memory is still 335.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.66ms. Allocated memory is still 373.3MB. Free memory was 334.4MB in the beginning and 332.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.14ms. Allocated memory is still 373.3MB. Free memory was 332.9MB in the beginning and 332.0MB in the end (delta: 877.5kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 214.64ms. Allocated memory is still 373.3MB. Free memory was 331.9MB in the beginning and 322.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 819302.61ms. Allocated memory was 373.3MB in the beginning and 658.5MB in the end (delta: 285.2MB). Free memory was 321.6MB in the beginning and 247.8MB in the end (delta: 73.8MB). Peak memory consumption was 392.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 13ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 13ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 13ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 819.2s, OverallIterations: 53, TraceHistogramMax: 2, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.1s, AutomataDifference: 26.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7585 SdHoareTripleChecker+Valid, 7.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7585 mSDsluCounter, 11898 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19136 IncrementalHoareTripleChecker+Unchecked, 16771 mSDsCounter, 1584 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17660 IncrementalHoareTripleChecker+Invalid, 38380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1584 mSolverCounterUnsat, 1312 mSDtfsCounter, 17660 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4938 GetRequests, 2515 SyntacticMatches, 221 SemanticMatches, 2202 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 40328 ImplicationChecksByTransitivity, 34.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4460occurred in iteration=50, InterpolantAutomatonStates: 1537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 52 MinimizatonAttempts, 26546 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 50.9s InterpolantComputationTime, 3204 NumberOfCodeBlocks, 3204 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 4638 ConstructedInterpolants, 832 QuantifiedInterpolants, 56221 SizeOfPredicates, 862 NumberOfNonLiveVariables, 3371 ConjunctsInSsa, 1089 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 79/1900 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