/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:55:39,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:55:39,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:55:39,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:55:39,655 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 [2022-03-01 17:55:39,669 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:55:39,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:55:39,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:55:39,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:55:39,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:55:39,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:55:39,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:55:39,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:55:39,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:55:39,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:55:39,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:55:39,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:55:39,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:55:39,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:55:39,673 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:55:39,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:55:39,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:55:39,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:55:39,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:55:39,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:55:39,833 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:55:39,833 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:55:39,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl [2022-03-01 17:55:39,834 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl' [2022-03-01 17:55:39,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:55:39,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:55:39,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:55:39,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:55:39,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:55:39,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,883 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:55:39,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:55:39,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:55:39,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:55:39,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:55:39,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:55:39,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:55:39,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:55:39,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:55:39,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/1) ... [2022-03-01 17:55:39,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:55:39,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:39,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:55:39,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:55:39,973 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:55:39,973 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:55:39,973 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:55:39,973 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:55:39,973 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:55:39,973 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:55:39,974 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:55:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:55:39,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:55:39,974 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 17:55:39,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 17:55:39,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 17:55:39,975 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:55:40,025 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:55:40,027 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:55:40,109 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:55:40,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:55:40,122 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 17:55:40,123 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:55:40 BoogieIcfgContainer [2022-03-01 17:55:40,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:55:40,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:55:40,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:55:40,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:55:40,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:55:39" (1/2) ... [2022-03-01 17:55:40,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699202bc and model type horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:55:40, skipping insertion in model container [2022-03-01 17:55:40,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:55:40" (2/2) ... [2022-03-01 17:55:40,128 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe.wvr.bpl [2022-03-01 17:55:40,131 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:55:40,132 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:55:40,132 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:55:40,132 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:55:40,154 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 17:55:40,206 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:55:40,215 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:55:40,215 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 17:55:40,224 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2022-03-01 17:55:40,278 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 353 states, 352 states have (on average 2.946022727272727) internal successors, (1037), 352 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 352 states have (on average 2.946022727272727) internal successors, (1037), 352 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:55:40,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:40,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:40,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1079038960, now seen corresponding path program 1 times [2022-03-01 17:55:40,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:40,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34731377] [2022-03-01 17:55:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:40,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34731377] [2022-03-01 17:55:40,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34731377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:55:40,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:55:40,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 17:55:40,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345552043] [2022-03-01 17:55:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:55:40,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:55:40,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:55:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:55:40,427 INFO L87 Difference]: Start difference. First operand has 353 states, 352 states have (on average 2.946022727272727) internal successors, (1037), 352 states have internal predecessors, (1037), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:40,466 INFO L93 Difference]: Finished difference Result 401 states and 1181 transitions. [2022-03-01 17:55:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:55:40,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:55:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:40,480 INFO L225 Difference]: With dead ends: 401 [2022-03-01 17:55:40,480 INFO L226 Difference]: Without dead ends: 401 [2022-03-01 17:55:40,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:55:40,483 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:40,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:55:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-03-01 17:55:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-03-01 17:55:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.9525) internal successors, (1181), 400 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1181 transitions. [2022-03-01 17:55:40,568 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1181 transitions. Word has length 16 [2022-03-01 17:55:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:40,568 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1181 transitions. [2022-03-01 17:55:40,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1181 transitions. [2022-03-01 17:55:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:55:40,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:40,571 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] [2022-03-01 17:55:40,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:55:40,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash -589825538, now seen corresponding path program 1 times [2022-03-01 17:55:40,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:40,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362816077] [2022-03-01 17:55:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:40,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362816077] [2022-03-01 17:55:40,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362816077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:55:40,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:55:40,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 17:55:40,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71648602] [2022-03-01 17:55:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:55:40,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:55:40,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:55:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:55:40,599 INFO L87 Difference]: Start difference. First operand 401 states and 1181 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:40,636 INFO L93 Difference]: Finished difference Result 458 states and 1351 transitions. [2022-03-01 17:55:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:55:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:55:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:40,640 INFO L225 Difference]: With dead ends: 458 [2022-03-01 17:55:40,640 INFO L226 Difference]: Without dead ends: 458 [2022-03-01 17:55:40,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:55:40,641 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:40,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:55:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-01 17:55:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2022-03-01 17:55:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.9562363238512037) internal successors, (1351), 457 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1351 transitions. [2022-03-01 17:55:40,669 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1351 transitions. Word has length 21 [2022-03-01 17:55:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:40,670 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1351 transitions. [2022-03-01 17:55:40,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1351 transitions. [2022-03-01 17:55:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 17:55:40,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:40,671 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, 1, 1] [2022-03-01 17:55:40,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:55:40,672 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1708981119, now seen corresponding path program 1 times [2022-03-01 17:55:40,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:40,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379114374] [2022-03-01 17:55:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:40,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:40,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379114374] [2022-03-01 17:55:40,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379114374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:55:40,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:55:40,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 17:55:40,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911448314] [2022-03-01 17:55:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:55:40,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:55:40,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:55:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:55:40,715 INFO L87 Difference]: Start difference. First operand 458 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:40,747 INFO L93 Difference]: Finished difference Result 463 states and 1345 transitions. [2022-03-01 17:55:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:55:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 17:55:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:40,750 INFO L225 Difference]: With dead ends: 463 [2022-03-01 17:55:40,750 INFO L226 Difference]: Without dead ends: 463 [2022-03-01 17:55:40,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:55:40,751 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:40,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:55:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-01 17:55:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2022-03-01 17:55:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2022-03-01 17:55:40,775 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 25 [2022-03-01 17:55:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:40,775 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2022-03-01 17:55:40,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2022-03-01 17:55:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 17:55:40,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:40,777 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, 1, 1] [2022-03-01 17:55:40,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:55:40,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1600956287, now seen corresponding path program 2 times [2022-03-01 17:55:40,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:40,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451245892] [2022-03-01 17:55:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:40,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:41,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:41,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451245892] [2022-03-01 17:55:41,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451245892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:41,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593533940] [2022-03-01 17:55:41,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:41,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:41,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:55:41,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:55:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:41,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:55:41,462 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 13 treesize of output 9 [2022-03-01 17:55:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:41,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:41,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:41,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-03-01 17:55:42,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:42,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-01 17:55:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:42,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593533940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:42,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:42,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-03-01 17:55:42,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541903008] [2022-03-01 17:55:42,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:42,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:55:42,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:55:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:55:42,075 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:43,266 INFO L93 Difference]: Finished difference Result 1680 states and 4954 transitions. [2022-03-01 17:55:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:55:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-01 17:55:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:43,273 INFO L225 Difference]: With dead ends: 1680 [2022-03-01 17:55:43,273 INFO L226 Difference]: Without dead ends: 1618 [2022-03-01 17:55:43,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=364, Invalid=2392, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:55:43,275 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 873 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:43,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 998 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:55:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-03-01 17:55:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 637. [2022-03-01 17:55:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.9276729559748427) internal successors, (1862), 636 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1862 transitions. [2022-03-01 17:55:43,298 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1862 transitions. Word has length 25 [2022-03-01 17:55:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:43,298 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1862 transitions. [2022-03-01 17:55:43,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1862 transitions. [2022-03-01 17:55:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 17:55:43,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:43,301 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, 1, 1] [2022-03-01 17:55:43,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:43,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:43,517 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash -997704769, now seen corresponding path program 3 times [2022-03-01 17:55:43,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:43,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733971078] [2022-03-01 17:55:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:43,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:43,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:43,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733971078] [2022-03-01 17:55:43,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733971078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:43,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580733173] [2022-03-01 17:55:43,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:43,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:43,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:43,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:55:43,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:43,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:55:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:43,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:55:43,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:55:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:44,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:44,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:44,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-03-01 17:55:44,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:44,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 43 [2022-03-01 17:55:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:44,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580733173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:44,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:44,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-01 17:55:44,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371746774] [2022-03-01 17:55:44,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:44,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:55:44,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:55:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:55:44,485 INFO L87 Difference]: Start difference. First operand 637 states and 1862 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2022-03-01 17:55:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:46,087 INFO L93 Difference]: Finished difference Result 1689 states and 4870 transitions. [2022-03-01 17:55:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:55:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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 25 [2022-03-01 17:55:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:46,094 INFO L225 Difference]: With dead ends: 1689 [2022-03-01 17:55:46,094 INFO L226 Difference]: Without dead ends: 1637 [2022-03-01 17:55:46,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=2556, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:55:46,096 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 629 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:46,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 1426 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:55:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2022-03-01 17:55:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 755. [2022-03-01 17:55:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.8779840848806364) internal successors, (2170), 754 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2170 transitions. [2022-03-01 17:55:46,117 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2170 transitions. Word has length 25 [2022-03-01 17:55:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:46,117 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2170 transitions. [2022-03-01 17:55:46,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 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) [2022-03-01 17:55:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2170 transitions. [2022-03-01 17:55:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:55:46,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:46,119 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, 1, 1, 1, 1, 1] [2022-03-01 17:55:46,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-01 17:55:46,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:46,336 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash -126935638, now seen corresponding path program 1 times [2022-03-01 17:55:46,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:46,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892728589] [2022-03-01 17:55:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:46,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:46,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892728589] [2022-03-01 17:55:46,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892728589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:46,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117172082] [2022-03-01 17:55:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:46,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:46,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:46,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:46,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:55:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:55:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:46,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:55:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:46,517 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:55:46,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-03-01 17:55:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:46,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117172082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:46,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:46,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 17:55:46,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154043243] [2022-03-01 17:55:46,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:46,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:55:46,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:55:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:55:46,523 INFO L87 Difference]: Start difference. First operand 755 states and 2170 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:46,584 INFO L93 Difference]: Finished difference Result 972 states and 2800 transitions. [2022-03-01 17:55:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:55:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:55:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:46,588 INFO L225 Difference]: With dead ends: 972 [2022-03-01 17:55:46,588 INFO L226 Difference]: Without dead ends: 972 [2022-03-01 17:55:46,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:55:46,589 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:46,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 107 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:55:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-03-01 17:55:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 773. [2022-03-01 17:55:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.873056994818653) internal successors, (2218), 772 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2218 transitions. [2022-03-01 17:55:46,604 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2218 transitions. Word has length 28 [2022-03-01 17:55:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:46,605 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2218 transitions. [2022-03-01 17:55:46,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2218 transitions. [2022-03-01 17:55:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:55:46,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:46,607 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, 1, 1] [2022-03-01 17:55:46,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:46,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:46,821 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2132365886, now seen corresponding path program 4 times [2022-03-01 17:55:46,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:46,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453116488] [2022-03-01 17:55:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:46,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:46,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453116488] [2022-03-01 17:55:46,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453116488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:46,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249742393] [2022-03-01 17:55:46,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:46,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:46,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:46,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:46,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:55:46,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:46,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:46,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:55:46,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:46,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 17:55:46,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249742393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:55:46,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 17:55:46,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-03-01 17:55:46,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549069655] [2022-03-01 17:55:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:55:46,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:55:46,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:55:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:55:46,957 INFO L87 Difference]: Start difference. First operand 773 states and 2218 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:46,980 INFO L93 Difference]: Finished difference Result 1430 states and 4086 transitions. [2022-03-01 17:55:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:55:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:55:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:46,986 INFO L225 Difference]: With dead ends: 1430 [2022-03-01 17:55:46,986 INFO L226 Difference]: Without dead ends: 1364 [2022-03-01 17:55:46,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:55:46,987 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:46,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 55 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:55:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-03-01 17:55:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1108. [2022-03-01 17:55:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.962962962962963) internal successors, (3280), 1107 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3280 transitions. [2022-03-01 17:55:47,010 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3280 transitions. Word has length 29 [2022-03-01 17:55:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:47,011 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 3280 transitions. [2022-03-01 17:55:47,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3280 transitions. [2022-03-01 17:55:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:55:47,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:47,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:47,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:47,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:47,227 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -788828979, now seen corresponding path program 5 times [2022-03-01 17:55:47,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:47,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351039286] [2022-03-01 17:55:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:47,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:47,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351039286] [2022-03-01 17:55:47,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351039286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:47,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112246208] [2022-03-01 17:55:47,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:47,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:47,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:47,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:47,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:55:47,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:55:47,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:47,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:55:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:47,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 17:55:47,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112246208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:55:47,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 17:55:47,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-03-01 17:55:47,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069527338] [2022-03-01 17:55:47,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:55:47,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:55:47,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:55:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:55:47,350 INFO L87 Difference]: Start difference. First operand 1108 states and 3280 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:47,378 INFO L93 Difference]: Finished difference Result 3088 states and 9151 transitions. [2022-03-01 17:55:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:55:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:55:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:47,390 INFO L225 Difference]: With dead ends: 3088 [2022-03-01 17:55:47,391 INFO L226 Difference]: Without dead ends: 2925 [2022-03-01 17:55:47,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:55:47,391 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:47,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:55:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2022-03-01 17:55:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2475. [2022-03-01 17:55:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.0731608730800324) internal successors, (7603), 2474 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 7603 transitions. [2022-03-01 17:55:47,445 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 7603 transitions. Word has length 30 [2022-03-01 17:55:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:47,446 INFO L470 AbstractCegarLoop]: Abstraction has 2475 states and 7603 transitions. [2022-03-01 17:55:47,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 7603 transitions. [2022-03-01 17:55:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:47,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:47,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:47,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:47,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:47,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1876694586, now seen corresponding path program 2 times [2022-03-01 17:55:47,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:47,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905001105] [2022-03-01 17:55:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:55:47,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:47,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905001105] [2022-03-01 17:55:47,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905001105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:47,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108888446] [2022-03-01 17:55:47,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:47,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:47,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:47,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:55:47,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:47,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:47,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:55:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:47,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:55:47,812 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 11 treesize of output 7 [2022-03-01 17:55:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:55:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:47,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:47,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-01 17:55:47,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:47,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-01 17:55:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:55:47,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108888446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:47,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:47,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:55:47,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384623603] [2022-03-01 17:55:47,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:47,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:55:47,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:55:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:55:47,973 INFO L87 Difference]: Start difference. First operand 2475 states and 7603 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:48,149 INFO L93 Difference]: Finished difference Result 3669 states and 11137 transitions. [2022-03-01 17:55:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:55:48,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:48,163 INFO L225 Difference]: With dead ends: 3669 [2022-03-01 17:55:48,163 INFO L226 Difference]: Without dead ends: 3669 [2022-03-01 17:55:48,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:55:48,164 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 228 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:48,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 245 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:55:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2022-03-01 17:55:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3342. [2022-03-01 17:55:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 3.0634540556719547) internal successors, (10235), 3341 states have internal predecessors, (10235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 10235 transitions. [2022-03-01 17:55:48,236 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 10235 transitions. Word has length 33 [2022-03-01 17:55:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:48,236 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 10235 transitions. [2022-03-01 17:55:48,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 10235 transitions. [2022-03-01 17:55:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:55:48,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:48,243 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, 1, 1, 1, 1, 1] [2022-03-01 17:55:48,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:48,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:48,460 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:55:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash 760708557, now seen corresponding path program 3 times [2022-03-01 17:55:48,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:48,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91797949] [2022-03-01 17:55:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:48,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:48,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:48,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91797949] [2022-03-01 17:55:48,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91797949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:48,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054525148] [2022-03-01 17:55:48,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:48,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:48,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:48,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:48,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:55:48,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:55:48,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 17:55:48,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:49,532 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:55:49,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 17:55:49,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:49,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:49,674 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 43 treesize of output 23 [2022-03-01 17:55:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:49,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:50,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:50,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:50,694 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 81 treesize of output 93 [2022-03-01 17:55:51,577 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:55:51,577 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 87 treesize of output 95 [2022-03-01 17:55:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:51,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054525148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:51,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:51,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 53 [2022-03-01 17:55:51,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294881714] [2022-03-01 17:55:51,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:51,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-01 17:55:51,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:51,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-01 17:55:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2580, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:55:51,816 INFO L87 Difference]: Start difference. First operand 3342 states and 10235 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:59,894 INFO L93 Difference]: Finished difference Result 11093 states and 32275 transitions. [2022-03-01 17:55:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-01 17:55:59,894 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:55:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:59,926 INFO L225 Difference]: With dead ends: 11093 [2022-03-01 17:55:59,926 INFO L226 Difference]: Without dead ends: 10678 [2022-03-01 17:55:59,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6608 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2677, Invalid=20275, Unknown=0, NotChecked=0, Total=22952 [2022-03-01 17:55:59,930 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 2582 mSDsluCounter, 5950 mSDsCounter, 0 mSdLazyCounter, 5556 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 4442 SdHoareTripleChecker+Invalid, 6272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 5556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:59,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2582 Valid, 4442 Invalid, 6272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 5556 Invalid, 0 Unknown, 303 Unchecked, 2.6s Time] [2022-03-01 17:55:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2022-03-01 17:56:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 4243. [2022-03-01 17:56:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4243 states, 4242 states have (on average 3.026874115983027) internal successors, (12840), 4242 states have internal predecessors, (12840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 12840 transitions. [2022-03-01 17:56:00,057 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 12840 transitions. Word has length 37 [2022-03-01 17:56:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:00,057 INFO L470 AbstractCegarLoop]: Abstraction has 4243 states and 12840 transitions. [2022-03-01 17:56:00,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 12840 transitions. [2022-03-01 17:56:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:56:00,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:00,065 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, 1, 1, 1, 1, 1] [2022-03-01 17:56:00,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:00,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:00,275 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:56:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1837952499, now seen corresponding path program 4 times [2022-03-01 17:56:00,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:00,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577259020] [2022-03-01 17:56:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:00,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:00,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:00,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577259020] [2022-03-01 17:56:00,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577259020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:00,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237898590] [2022-03-01 17:56:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:00,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:00,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:00,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:00,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:56:00,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:00,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:01,214 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:01,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 17:56:01,299 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:01,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:56:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:01,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:02,246 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:56:02,246 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 93 treesize of output 92 [2022-03-01 17:56:02,795 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:56:02,796 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 80 treesize of output 86 [2022-03-01 17:56:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:02,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237898590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:02,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:02,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2022-03-01 17:56:02,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896183592] [2022-03-01 17:56:02,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:02,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-01 17:56:02,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-01 17:56:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:56:02,990 INFO L87 Difference]: Start difference. First operand 4243 states and 12840 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:15,496 INFO L93 Difference]: Finished difference Result 8669 states and 25212 transitions. [2022-03-01 17:56:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-01 17:56:15,496 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:56:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:15,520 INFO L225 Difference]: With dead ends: 8669 [2022-03-01 17:56:15,520 INFO L226 Difference]: Without dead ends: 8381 [2022-03-01 17:56:15,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10659 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3070, Invalid=32840, Unknown=0, NotChecked=0, Total=35910 [2022-03-01 17:56:15,525 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 1675 mSDsluCounter, 6525 mSDsCounter, 0 mSdLazyCounter, 7450 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1675 SdHoareTripleChecker+Valid, 4795 SdHoareTripleChecker+Invalid, 7766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 7450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:15,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1675 Valid, 4795 Invalid, 7766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 7450 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-01 17:56:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8381 states. [2022-03-01 17:56:15,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8381 to 4623. [2022-03-01 17:56:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 2.9831241886629165) internal successors, (13788), 4622 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 13788 transitions. [2022-03-01 17:56:15,636 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 13788 transitions. Word has length 37 [2022-03-01 17:56:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:15,637 INFO L470 AbstractCegarLoop]: Abstraction has 4623 states and 13788 transitions. [2022-03-01 17:56:15,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 13788 transitions. [2022-03-01 17:56:15,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:56:15,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:15,646 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, 1, 1, 1, 1, 1] [2022-03-01 17:56:15,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:15,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-01 17:56:15,858 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:56:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2020109461, now seen corresponding path program 5 times [2022-03-01 17:56:15,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:15,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554746922] [2022-03-01 17:56:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:16,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554746922] [2022-03-01 17:56:16,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554746922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:16,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662320133] [2022-03-01 17:56:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:16,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:16,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:16,275 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:16,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:56:16,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:56:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:16,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:56:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:16,806 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:16,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 17:56:16,875 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:16,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 17:56:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:17,416 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:56:17,417 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 76 treesize of output 92 [2022-03-01 17:56:17,894 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:56:17,894 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 78 treesize of output 90 [2022-03-01 17:56:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:18,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662320133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:18,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:18,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 48 [2022-03-01 17:56:18,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382422913] [2022-03-01 17:56:18,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:18,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 17:56:18,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 17:56:18,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2136, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:56:18,094 INFO L87 Difference]: Start difference. First operand 4623 states and 13788 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:23,564 INFO L93 Difference]: Finished difference Result 8144 states and 23305 transitions. [2022-03-01 17:56:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-01 17:56:23,565 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:56:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:23,595 INFO L225 Difference]: With dead ends: 8144 [2022-03-01 17:56:23,595 INFO L226 Difference]: Without dead ends: 7947 [2022-03-01 17:56:23,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4902 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1378, Invalid=15134, Unknown=0, NotChecked=0, Total=16512 [2022-03-01 17:56:23,596 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 1318 mSDsluCounter, 5330 mSDsCounter, 0 mSdLazyCounter, 5809 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 4012 SdHoareTripleChecker+Invalid, 6029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 5809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:23,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1318 Valid, 4012 Invalid, 6029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 5809 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 17:56:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-03-01 17:56:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 4731. [2022-03-01 17:56:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 4730 states have (on average 2.980972515856237) internal successors, (14100), 4730 states have internal predecessors, (14100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 14100 transitions. [2022-03-01 17:56:23,685 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 14100 transitions. Word has length 37 [2022-03-01 17:56:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:23,685 INFO L470 AbstractCegarLoop]: Abstraction has 4731 states and 14100 transitions. [2022-03-01 17:56:23,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 14100 transitions. [2022-03-01 17:56:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:56:23,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:23,693 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, 1, 1, 1, 1, 1] [2022-03-01 17:56:23,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:23,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:56:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1846096807, now seen corresponding path program 6 times [2022-03-01 17:56:23,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:23,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263247216] [2022-03-01 17:56:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:23,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:24,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:24,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263247216] [2022-03-01 17:56:24,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263247216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:24,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222064769] [2022-03-01 17:56:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:24,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:24,314 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:24,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:56:24,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:56:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:24,726 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:24,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 17:56:24,974 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:24,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2022-03-01 17:56:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:25,795 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:56:25,795 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 89 treesize of output 88 [2022-03-01 17:56:26,297 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:56:26,298 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 75 treesize of output 83 [2022-03-01 17:56:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:26,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222064769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:26,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:26,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 17:56:26,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872823048] [2022-03-01 17:56:26,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:26,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 17:56:26,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 17:56:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2703, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:56:26,466 INFO L87 Difference]: Start difference. First operand 4731 states and 14100 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:37,684 INFO L93 Difference]: Finished difference Result 16984 states and 49269 transitions. [2022-03-01 17:56:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-03-01 17:56:37,684 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:56:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:37,719 INFO L225 Difference]: With dead ends: 16984 [2022-03-01 17:56:37,720 INFO L226 Difference]: Without dead ends: 16612 [2022-03-01 17:56:37,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15765 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=6018, Invalid=37872, Unknown=0, NotChecked=0, Total=43890 [2022-03-01 17:56:37,722 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 2869 mSDsluCounter, 6558 mSDsCounter, 0 mSdLazyCounter, 6312 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2869 SdHoareTripleChecker+Valid, 4717 SdHoareTripleChecker+Invalid, 6808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 6312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:37,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2869 Valid, 4717 Invalid, 6808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 6312 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-01 17:56:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16612 states. [2022-03-01 17:56:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16612 to 5111. [2022-03-01 17:56:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5111 states, 5110 states have (on average 2.9792563600782778) internal successors, (15224), 5110 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5111 states to 5111 states and 15224 transitions. [2022-03-01 17:56:37,882 INFO L78 Accepts]: Start accepts. Automaton has 5111 states and 15224 transitions. Word has length 37 [2022-03-01 17:56:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:37,882 INFO L470 AbstractCegarLoop]: Abstraction has 5111 states and 15224 transitions. [2022-03-01 17:56:37,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5111 states and 15224 transitions. [2022-03-01 17:56:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:56:37,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:37,891 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, 1, 1, 1, 1, 1] [2022-03-01 17:56:37,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:38,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 17:56:38,116 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:56:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash -752564249, now seen corresponding path program 7 times [2022-03-01 17:56:38,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:38,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850027075] [2022-03-01 17:56:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:38,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:38,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:38,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850027075] [2022-03-01 17:56:38,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850027075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:38,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798303429] [2022-03-01 17:56:38,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:38,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:38,513 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:38,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:56:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:56:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:38,907 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 17:56:38,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 17:56:39,121 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:39,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:56:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:40,071 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:56:40,072 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 93 treesize of output 92 [2022-03-01 17:56:40,635 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:56:40,636 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 80 treesize of output 86 [2022-03-01 17:56:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:40,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798303429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:40,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:40,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:56:40,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798958248] [2022-03-01 17:56:40,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:40,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:56:40,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:56:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2523, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:56:40,834 INFO L87 Difference]: Start difference. First operand 5111 states and 15224 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:56,158 INFO L93 Difference]: Finished difference Result 10026 states and 28905 transitions. [2022-03-01 17:56:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-03-01 17:56:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:56:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:56,176 INFO L225 Difference]: With dead ends: 10026 [2022-03-01 17:56:56,176 INFO L226 Difference]: Without dead ends: 9689 [2022-03-01 17:56:56,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12779 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3897, Invalid=37923, Unknown=0, NotChecked=0, Total=41820 [2022-03-01 17:56:56,178 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 1565 mSDsluCounter, 7580 mSDsCounter, 0 mSdLazyCounter, 8851 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 5305 SdHoareTripleChecker+Invalid, 9185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 8851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:56,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1565 Valid, 5305 Invalid, 9185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 8851 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-01 17:56:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9689 states. [2022-03-01 17:56:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9689 to 5205. [2022-03-01 17:56:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5205 states, 5204 states have (on average 2.976748654880861) internal successors, (15491), 5204 states have internal predecessors, (15491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 15491 transitions. [2022-03-01 17:56:56,307 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 15491 transitions. Word has length 37 [2022-03-01 17:56:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:56,308 INFO L470 AbstractCegarLoop]: Abstraction has 5205 states and 15491 transitions. [2022-03-01 17:56:56,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 15491 transitions. [2022-03-01 17:56:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:56:56,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:56,316 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, 1, 1, 1, 1, 1] [2022-03-01 17:56:56,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:56,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 17:56:56,523 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:56:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1798039041, now seen corresponding path program 8 times [2022-03-01 17:56:56,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:56,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207947712] [2022-03-01 17:56:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:56,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:56,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207947712] [2022-03-01 17:56:56,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207947712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:56,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863282415] [2022-03-01 17:56:56,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:56,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:56,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:56,887 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:56,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:56:56,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:56,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:57,321 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:57,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 17:56:57,574 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:56:57,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 17 [2022-03-01 17:56:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:57,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:58,546 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:56:58,546 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 93 treesize of output 92 [2022-03-01 17:56:59,173 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:56:59,174 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 85 treesize of output 91 [2022-03-01 17:56:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:59,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863282415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:59,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:59,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:56:59,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414152286] [2022-03-01 17:56:59,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:59,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:56:59,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:59,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:56:59,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2528, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:56:59,416 INFO L87 Difference]: Start difference. First operand 5205 states and 15491 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:14,110 INFO L93 Difference]: Finished difference Result 10481 states and 30203 transitions. [2022-03-01 17:57:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-03-01 17:57:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:57:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:14,128 INFO L225 Difference]: With dead ends: 10481 [2022-03-01 17:57:14,128 INFO L226 Difference]: Without dead ends: 10159 [2022-03-01 17:57:14,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13196 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=3860, Invalid=39196, Unknown=0, NotChecked=0, Total=43056 [2022-03-01 17:57:14,131 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 1725 mSDsluCounter, 5762 mSDsCounter, 0 mSdLazyCounter, 6502 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1725 SdHoareTripleChecker+Valid, 3996 SdHoareTripleChecker+Invalid, 6867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 6502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:14,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1725 Valid, 3996 Invalid, 6867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 6502 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-01 17:57:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10159 states. [2022-03-01 17:57:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10159 to 5293. [2022-03-01 17:57:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 5292 states have (on average 2.9750566893424035) internal successors, (15744), 5292 states have internal predecessors, (15744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 15744 transitions. [2022-03-01 17:57:14,278 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 15744 transitions. Word has length 37 [2022-03-01 17:57:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:14,278 INFO L470 AbstractCegarLoop]: Abstraction has 5293 states and 15744 transitions. [2022-03-01 17:57:14,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 15744 transitions. [2022-03-01 17:57:14,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:57:14,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:14,287 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, 1, 1, 1, 1, 1] [2022-03-01 17:57:14,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-01 17:57:14,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 17:57:14,503 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:57:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -382674115, now seen corresponding path program 9 times [2022-03-01 17:57:14,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:14,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230196506] [2022-03-01 17:57:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:14,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:14,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230196506] [2022-03-01 17:57:14,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230196506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:14,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179560924] [2022-03-01 17:57:14,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:14,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:14,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:57:14,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:57:14,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:15,272 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:57:15,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 17:57:15,565 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:57:15,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 17:57:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:15,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:16,467 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:57:16,468 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 93 treesize of output 92 [2022-03-01 17:57:17,057 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:57:17,058 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 85 treesize of output 91 [2022-03-01 17:57:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:17,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179560924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:17,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:17,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:57:17,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377994467] [2022-03-01 17:57:17,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:17,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:57:17,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:17,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:57:17,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:57:17,295 INFO L87 Difference]: Start difference. First operand 5293 states and 15744 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:33,874 INFO L93 Difference]: Finished difference Result 10974 states and 31822 transitions. [2022-03-01 17:57:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-03-01 17:57:33,874 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:57:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:33,893 INFO L225 Difference]: With dead ends: 10974 [2022-03-01 17:57:33,893 INFO L226 Difference]: Without dead ends: 10617 [2022-03-01 17:57:33,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14500 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=4087, Invalid=41495, Unknown=0, NotChecked=0, Total=45582 [2022-03-01 17:57:33,895 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 1581 mSDsluCounter, 7275 mSDsCounter, 0 mSdLazyCounter, 8235 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1581 SdHoareTripleChecker+Valid, 5024 SdHoareTripleChecker+Invalid, 8589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 8235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:33,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1581 Valid, 5024 Invalid, 8589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 8235 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-01 17:57:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2022-03-01 17:57:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 5422. [2022-03-01 17:57:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5422 states, 5421 states have (on average 2.973805570927873) internal successors, (16121), 5421 states have internal predecessors, (16121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5422 states to 5422 states and 16121 transitions. [2022-03-01 17:57:34,034 INFO L78 Accepts]: Start accepts. Automaton has 5422 states and 16121 transitions. Word has length 37 [2022-03-01 17:57:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:34,034 INFO L470 AbstractCegarLoop]: Abstraction has 5422 states and 16121 transitions. [2022-03-01 17:57:34,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5422 states and 16121 transitions. [2022-03-01 17:57:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:57:34,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:34,043 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, 1, 1, 1, 1, 1] [2022-03-01 17:57:34,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:34,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 17:57:34,260 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:57:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 762857745, now seen corresponding path program 10 times [2022-03-01 17:57:34,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:34,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666253642] [2022-03-01 17:57:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:34,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:34,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666253642] [2022-03-01 17:57:34,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666253642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:34,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667218345] [2022-03-01 17:57:34,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:34,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:34,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:34,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:57:34,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:34,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:34,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:57:34,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:35,018 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 17:57:35,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 17:57:35,230 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:57:35,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:57:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:35,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:36,219 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:57:36,219 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 93 treesize of output 92 [2022-03-01 17:57:36,792 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:57:36,793 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 80 treesize of output 86 [2022-03-01 17:57:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:36,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667218345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:36,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:36,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:57:36,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91114990] [2022-03-01 17:57:36,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:36,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:57:36,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:57:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2525, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:57:36,956 INFO L87 Difference]: Start difference. First operand 5422 states and 16121 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:52,659 INFO L93 Difference]: Finished difference Result 10583 states and 30574 transitions. [2022-03-01 17:57:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-01 17:57:52,660 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:57:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:52,677 INFO L225 Difference]: With dead ends: 10583 [2022-03-01 17:57:52,677 INFO L226 Difference]: Without dead ends: 10261 [2022-03-01 17:57:52,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14254 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4276, Invalid=41306, Unknown=0, NotChecked=0, Total=45582 [2022-03-01 17:57:52,679 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 1725 mSDsluCounter, 7794 mSDsCounter, 0 mSdLazyCounter, 8686 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1725 SdHoareTripleChecker+Valid, 5546 SdHoareTripleChecker+Invalid, 9026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 8686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:52,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1725 Valid, 5546 Invalid, 9026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 8686 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-01 17:57:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2022-03-01 17:57:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 5538. [2022-03-01 17:57:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5538 states, 5537 states have (on average 2.968033230991512) internal successors, (16434), 5537 states have internal predecessors, (16434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 16434 transitions. [2022-03-01 17:57:52,806 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 16434 transitions. Word has length 37 [2022-03-01 17:57:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 5538 states and 16434 transitions. [2022-03-01 17:57:52,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 16434 transitions. [2022-03-01 17:57:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:57:52,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:52,815 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, 1, 1, 1, 1, 1] [2022-03-01 17:57:52,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-01 17:57:53,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:53,018 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:57:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1417855411, now seen corresponding path program 11 times [2022-03-01 17:57:53,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:53,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858841069] [2022-03-01 17:57:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:53,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:53,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858841069] [2022-03-01 17:57:53,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858841069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:53,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919121644] [2022-03-01 17:57:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:53,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:53,370 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:53,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:57:53,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:57:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:57:53,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:53,757 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:57:53,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 17:57:53,953 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:57:53,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-03-01 17:57:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:54,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:54,640 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:57:54,640 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 82 treesize of output 88 [2022-03-01 17:57:55,128 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:57:55,129 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 70 treesize of output 75 [2022-03-01 17:57:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:55,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919121644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:55,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:55,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 48 [2022-03-01 17:57:55,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71122292] [2022-03-01 17:57:55,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:55,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 17:57:55,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 17:57:55,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:57:55,304 INFO L87 Difference]: Start difference. First operand 5538 states and 16434 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:02,094 INFO L93 Difference]: Finished difference Result 9530 states and 28070 transitions. [2022-03-01 17:58:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 17:58:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:58:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:02,110 INFO L225 Difference]: With dead ends: 9530 [2022-03-01 17:58:02,111 INFO L226 Difference]: Without dead ends: 9303 [2022-03-01 17:58:02,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3945 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1516, Invalid=13984, Unknown=0, NotChecked=0, Total=15500 [2022-03-01 17:58:02,112 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 1156 mSDsluCounter, 5260 mSDsCounter, 0 mSdLazyCounter, 5988 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 3791 SdHoareTripleChecker+Invalid, 6272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 5988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:02,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 3791 Invalid, 6272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 5988 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 17:58:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2022-03-01 17:58:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 5678. [2022-03-01 17:58:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5678 states, 5677 states have (on average 2.9637132288180377) internal successors, (16825), 5677 states have internal predecessors, (16825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5678 states to 5678 states and 16825 transitions. [2022-03-01 17:58:02,253 INFO L78 Accepts]: Start accepts. Automaton has 5678 states and 16825 transitions. Word has length 37 [2022-03-01 17:58:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:02,253 INFO L470 AbstractCegarLoop]: Abstraction has 5678 states and 16825 transitions. [2022-03-01 17:58:02,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5678 states and 16825 transitions. [2022-03-01 17:58:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:58:02,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:02,262 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, 1, 1, 1, 1, 1] [2022-03-01 17:58:02,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:02,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:58:02,464 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:58:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:02,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1095453725, now seen corresponding path program 12 times [2022-03-01 17:58:02,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:02,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552197923] [2022-03-01 17:58:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:02,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:02,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:02,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552197923] [2022-03-01 17:58:02,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552197923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:02,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483273253] [2022-03-01 17:58:02,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:02,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:02,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:02,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:58:02,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:58:02,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:02,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:58:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:03,268 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:58:03,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 17:58:03,494 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:58:03,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-03-01 17:58:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:03,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:04,354 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:58:04,354 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 89 treesize of output 88 [2022-03-01 17:58:04,869 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:58:04,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2022-03-01 17:58:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:05,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483273253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:05,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:05,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 17:58:05,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921829598] [2022-03-01 17:58:05,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:05,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 17:58:05,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 17:58:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2712, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:58:05,076 INFO L87 Difference]: Start difference. First operand 5678 states and 16825 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:13,431 INFO L93 Difference]: Finished difference Result 13448 states and 38836 transitions. [2022-03-01 17:58:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-01 17:58:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:58:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:13,456 INFO L225 Difference]: With dead ends: 13448 [2022-03-01 17:58:13,456 INFO L226 Difference]: Without dead ends: 13145 [2022-03-01 17:58:13,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9603 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3747, Invalid=25665, Unknown=0, NotChecked=0, Total=29412 [2022-03-01 17:58:13,458 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 2998 mSDsluCounter, 6277 mSDsCounter, 0 mSdLazyCounter, 6011 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 4479 SdHoareTripleChecker+Invalid, 6442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 6011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:13,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 4479 Invalid, 6442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 6011 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-01 17:58:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2022-03-01 17:58:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 5714. [2022-03-01 17:58:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5714 states, 5713 states have (on average 2.962541571853667) internal successors, (16925), 5713 states have internal predecessors, (16925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5714 states to 5714 states and 16925 transitions. [2022-03-01 17:58:13,596 INFO L78 Accepts]: Start accepts. Automaton has 5714 states and 16925 transitions. Word has length 37 [2022-03-01 17:58:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:13,596 INFO L470 AbstractCegarLoop]: Abstraction has 5714 states and 16925 transitions. [2022-03-01 17:58:13,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5714 states and 16925 transitions. [2022-03-01 17:58:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:58:13,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:13,606 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, 1, 1, 1, 1, 1] [2022-03-01 17:58:13,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:13,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:13,806 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:58:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash 600852515, now seen corresponding path program 13 times [2022-03-01 17:58:13,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:13,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604578039] [2022-03-01 17:58:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:14,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:14,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604578039] [2022-03-01 17:58:14,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604578039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:14,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534337573] [2022-03-01 17:58:14,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:14,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:14,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:14,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:14,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:58:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:58:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:14,570 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 17:58:14,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-03-01 17:58:14,792 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:58:14,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:58:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:15,707 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:58:15,708 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 93 treesize of output 92 [2022-03-01 17:58:16,317 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:58:16,317 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 80 treesize of output 86 [2022-03-01 17:58:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:16,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534337573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:16,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:16,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:58:16,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857793504] [2022-03-01 17:58:16,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:16,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:58:16,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:58:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2530, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:16,526 INFO L87 Difference]: Start difference. First operand 5714 states and 16925 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:30,655 INFO L93 Difference]: Finished difference Result 10746 states and 30915 transitions. [2022-03-01 17:58:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-03-01 17:58:30,655 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:58:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:30,673 INFO L225 Difference]: With dead ends: 10746 [2022-03-01 17:58:30,673 INFO L226 Difference]: Without dead ends: 10436 [2022-03-01 17:58:30,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13456 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=4003, Invalid=39887, Unknown=0, NotChecked=0, Total=43890 [2022-03-01 17:58:30,675 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 1570 mSDsluCounter, 7813 mSDsCounter, 0 mSdLazyCounter, 8654 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 5409 SdHoareTripleChecker+Invalid, 8971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 8654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:30,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 5409 Invalid, 8971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 8654 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-01 17:58:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10436 states. [2022-03-01 17:58:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10436 to 5767. [2022-03-01 17:58:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 2.961151578217135) internal successors, (17074), 5766 states have internal predecessors, (17074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 17074 transitions. [2022-03-01 17:58:30,800 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 17074 transitions. Word has length 37 [2022-03-01 17:58:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:30,800 INFO L470 AbstractCegarLoop]: Abstraction has 5767 states and 17074 transitions. [2022-03-01 17:58:30,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 17074 transitions. [2022-03-01 17:58:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:58:30,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:30,808 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, 1, 1, 1, 1, 1] [2022-03-01 17:58:30,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-01 17:58:31,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:31,011 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:58:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1579860641, now seen corresponding path program 14 times [2022-03-01 17:58:31,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:31,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336744522] [2022-03-01 17:58:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:31,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:31,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:31,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336744522] [2022-03-01 17:58:31,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336744522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:31,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355884954] [2022-03-01 17:58:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:31,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:31,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:31,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:31,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:58:31,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:31,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:31,746 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:58:31,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 17:58:32,023 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:58:32,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 17:58:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:32,918 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:58:32,918 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 93 treesize of output 92 [2022-03-01 17:58:33,480 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:58:33,480 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 80 treesize of output 86 [2022-03-01 17:58:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:33,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355884954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:33,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:33,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:58:33,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722526181] [2022-03-01 17:58:33,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:33,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:58:33,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:58:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2536, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:33,660 INFO L87 Difference]: Start difference. First operand 5767 states and 17074 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:47,904 INFO L93 Difference]: Finished difference Result 11169 states and 32354 transitions. [2022-03-01 17:58:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-03-01 17:58:47,904 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:58:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:47,922 INFO L225 Difference]: With dead ends: 11169 [2022-03-01 17:58:47,922 INFO L226 Difference]: Without dead ends: 10812 [2022-03-01 17:58:47,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12765 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3785, Invalid=37627, Unknown=0, NotChecked=0, Total=41412 [2022-03-01 17:58:47,924 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 1536 mSDsluCounter, 7342 mSDsCounter, 0 mSdLazyCounter, 8043 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 5019 SdHoareTripleChecker+Invalid, 8386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 8043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:47,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 5019 Invalid, 8386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 8043 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-01 17:58:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10812 states. [2022-03-01 17:58:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10812 to 5845. [2022-03-01 17:58:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5844 states have (on average 2.9591033538672145) internal successors, (17293), 5844 states have internal predecessors, (17293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 17293 transitions. [2022-03-01 17:58:48,036 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 17293 transitions. Word has length 37 [2022-03-01 17:58:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:48,036 INFO L470 AbstractCegarLoop]: Abstraction has 5845 states and 17293 transitions. [2022-03-01 17:58:48,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 17293 transitions. [2022-03-01 17:58:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:58:48,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:48,043 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, 1, 1, 1, 1, 1] [2022-03-01 17:58:48,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:48,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:48,245 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:58:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:48,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1508235505, now seen corresponding path program 15 times [2022-03-01 17:58:48,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:48,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256191357] [2022-03-01 17:58:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:48,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:48,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256191357] [2022-03-01 17:58:48,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256191357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:48,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845496892] [2022-03-01 17:58:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:48,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:48,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:48,574 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:48,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:58:48,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:48,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:48,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:48,964 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:58:48,964 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 27 treesize of output 15 [2022-03-01 17:58:49,232 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:58:49,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 17:58:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:49,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:50,142 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:58:50,142 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 93 treesize of output 92 [2022-03-01 17:58:50,712 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:58:50,712 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 80 treesize of output 86 [2022-03-01 17:58:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:50,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845496892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:50,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:50,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:58:50,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141254610] [2022-03-01 17:58:50,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:50,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:58:50,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:58:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2532, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:50,926 INFO L87 Difference]: Start difference. First operand 5845 states and 17293 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:05,381 INFO L93 Difference]: Finished difference Result 11335 states and 32815 transitions. [2022-03-01 17:59:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-03-01 17:59:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:59:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:05,399 INFO L225 Difference]: With dead ends: 11335 [2022-03-01 17:59:05,399 INFO L226 Difference]: Without dead ends: 11047 [2022-03-01 17:59:05,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12807 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3794, Invalid=38436, Unknown=0, NotChecked=0, Total=42230 [2022-03-01 17:59:05,401 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 1453 mSDsluCounter, 9421 mSDsCounter, 0 mSdLazyCounter, 9758 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 6609 SdHoareTripleChecker+Invalid, 10022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 9758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:05,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1453 Valid, 6609 Invalid, 10022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 9758 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-01 17:59:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11047 states. [2022-03-01 17:59:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11047 to 5894. [2022-03-01 17:59:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5894 states, 5893 states have (on average 2.957067707449516) internal successors, (17426), 5893 states have internal predecessors, (17426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5894 states to 5894 states and 17426 transitions. [2022-03-01 17:59:05,536 INFO L78 Accepts]: Start accepts. Automaton has 5894 states and 17426 transitions. Word has length 37 [2022-03-01 17:59:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:05,537 INFO L470 AbstractCegarLoop]: Abstraction has 5894 states and 17426 transitions. [2022-03-01 17:59:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5894 states and 17426 transitions. [2022-03-01 17:59:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:59:05,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:05,544 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, 1, 1, 1, 1, 1] [2022-03-01 17:59:05,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:05,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:05,747 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:59:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash 731849533, now seen corresponding path program 16 times [2022-03-01 17:59:05,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:05,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221245204] [2022-03-01 17:59:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:06,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:06,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221245204] [2022-03-01 17:59:06,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221245204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:06,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822064504] [2022-03-01 17:59:06,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:06,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:06,110 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:06,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:59:06,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:06,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:06,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:59:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:06,509 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 17:59:06,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 17:59:06,773 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:59:06,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 17:59:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:07,665 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:59:07,665 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 93 treesize of output 92 [2022-03-01 17:59:08,235 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:59:08,235 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 80 treesize of output 86 [2022-03-01 17:59:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:08,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822064504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:08,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:08,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:59:08,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874230445] [2022-03-01 17:59:08,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:08,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:59:08,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:08,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:59:08,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2532, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:59:08,410 INFO L87 Difference]: Start difference. First operand 5894 states and 17426 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:21,271 INFO L93 Difference]: Finished difference Result 11409 states and 33004 transitions. [2022-03-01 17:59:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-01 17:59:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:59:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:21,291 INFO L225 Difference]: With dead ends: 11409 [2022-03-01 17:59:21,291 INFO L226 Difference]: Without dead ends: 11114 [2022-03-01 17:59:21,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10783 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3438, Invalid=33234, Unknown=0, NotChecked=0, Total=36672 [2022-03-01 17:59:21,293 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 1425 mSDsluCounter, 8238 mSDsCounter, 0 mSdLazyCounter, 8714 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 5838 SdHoareTripleChecker+Invalid, 9001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 8714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:21,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 5838 Invalid, 9001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 8714 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-01 17:59:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11114 states. [2022-03-01 17:59:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11114 to 5867. [2022-03-01 17:59:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5866 states have (on average 2.956017729287419) internal successors, (17340), 5866 states have internal predecessors, (17340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 17340 transitions. [2022-03-01 17:59:21,411 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 17340 transitions. Word has length 37 [2022-03-01 17:59:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:21,411 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 17340 transitions. [2022-03-01 17:59:21,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 17340 transitions. [2022-03-01 17:59:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:59:21,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:21,419 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, 1, 1, 1, 1, 1] [2022-03-01 17:59:21,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:21,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-01 17:59:21,620 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:59:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1612415245, now seen corresponding path program 17 times [2022-03-01 17:59:21,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:21,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764720795] [2022-03-01 17:59:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:21,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:21,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:21,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764720795] [2022-03-01 17:59:21,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764720795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:21,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295982760] [2022-03-01 17:59:21,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:21,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:21,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:21,988 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:21,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:59:22,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:59:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 17:59:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:22,535 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:59:22,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 17:59:22,621 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:59:22,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-03-01 17:59:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:22,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:23,278 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:59:23,278 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 78 treesize of output 94 [2022-03-01 17:59:23,828 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:59:23,828 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 108 treesize of output 108 [2022-03-01 17:59:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:24,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295982760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:24,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:24,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 49 [2022-03-01 17:59:24,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895354227] [2022-03-01 17:59:24,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:24,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-01 17:59:24,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-01 17:59:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2249, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:59:24,181 INFO L87 Difference]: Start difference. First operand 5867 states and 17340 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:31,003 INFO L93 Difference]: Finished difference Result 9489 states and 27032 transitions. [2022-03-01 17:59:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-01 17:59:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:59:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:31,018 INFO L225 Difference]: With dead ends: 9489 [2022-03-01 17:59:31,018 INFO L226 Difference]: Without dead ends: 9292 [2022-03-01 17:59:31,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1388, Invalid=15904, Unknown=0, NotChecked=0, Total=17292 [2022-03-01 17:59:31,020 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1254 mSDsluCounter, 6359 mSDsCounter, 0 mSdLazyCounter, 7072 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 4818 SdHoareTripleChecker+Invalid, 7305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 7072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:31,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1254 Valid, 4818 Invalid, 7305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 7072 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-01 17:59:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9292 states. [2022-03-01 17:59:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9292 to 6164. [2022-03-01 17:59:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6164 states, 6163 states have (on average 2.947590459191952) internal successors, (18166), 6163 states have internal predecessors, (18166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6164 states to 6164 states and 18166 transitions. [2022-03-01 17:59:31,124 INFO L78 Accepts]: Start accepts. Automaton has 6164 states and 18166 transitions. Word has length 37 [2022-03-01 17:59:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:31,124 INFO L470 AbstractCegarLoop]: Abstraction has 6164 states and 18166 transitions. [2022-03-01 17:59:31,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 6164 states and 18166 transitions. [2022-03-01 17:59:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:59:31,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:31,131 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, 1, 1, 1, 1, 1] [2022-03-01 17:59:31,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:31,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 17:59:31,337 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:59:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2041176273, now seen corresponding path program 18 times [2022-03-01 17:59:31,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:31,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704545270] [2022-03-01 17:59:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:31,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:31,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704545270] [2022-03-01 17:59:31,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704545270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:31,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067771460] [2022-03-01 17:59:31,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:31,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:31,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:31,731 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:31,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:59:31,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:31,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:59:31,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:32,126 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:59:32,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 17:59:32,346 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:59:32,346 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 36 treesize of output 20 [2022-03-01 17:59:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:32,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:33,175 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:59:33,175 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 89 treesize of output 88 [2022-03-01 17:59:33,724 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:59:33,724 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 75 treesize of output 83 [2022-03-01 17:59:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:33,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067771460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:33,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:33,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 17:59:33,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382554309] [2022-03-01 17:59:33,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:33,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 17:59:33,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 17:59:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:59:33,886 INFO L87 Difference]: Start difference. First operand 6164 states and 18166 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:44,962 INFO L93 Difference]: Finished difference Result 19796 states and 58035 transitions. [2022-03-01 17:59:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-03-01 17:59:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 17:59:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:44,997 INFO L225 Difference]: With dead ends: 19796 [2022-03-01 17:59:44,998 INFO L226 Difference]: Without dead ends: 19487 [2022-03-01 17:59:44,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14208 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=5697, Invalid=35715, Unknown=0, NotChecked=0, Total=41412 [2022-03-01 17:59:45,000 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 2689 mSDsluCounter, 7206 mSDsCounter, 0 mSdLazyCounter, 7051 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2689 SdHoareTripleChecker+Valid, 5335 SdHoareTripleChecker+Invalid, 7506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 7051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:45,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2689 Valid, 5335 Invalid, 7506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 7051 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-01 17:59:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19487 states. [2022-03-01 17:59:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19487 to 6428. [2022-03-01 17:59:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6428 states, 6427 states have (on average 2.946475805196826) internal successors, (18937), 6427 states have internal predecessors, (18937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6428 states to 6428 states and 18937 transitions. [2022-03-01 17:59:45,205 INFO L78 Accepts]: Start accepts. Automaton has 6428 states and 18937 transitions. Word has length 37 [2022-03-01 17:59:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:45,205 INFO L470 AbstractCegarLoop]: Abstraction has 6428 states and 18937 transitions. [2022-03-01 17:59:45,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 6428 states and 18937 transitions. [2022-03-01 17:59:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 17:59:45,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:45,214 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, 1, 1, 1, 1, 1] [2022-03-01 17:59:45,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:45,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:45,415 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:59:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:45,415 INFO L85 PathProgramCache]: Analyzing trace with hash -344870033, now seen corresponding path program 19 times [2022-03-01 17:59:45,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:45,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097041698] [2022-03-01 17:59:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:45,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:45,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:45,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097041698] [2022-03-01 17:59:45,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097041698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:45,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666153652] [2022-03-01 17:59:45,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:45,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:45,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:45,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:45,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:59:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:59:45,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:46,153 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 17:59:46,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-03-01 17:59:46,372 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 17:59:46,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 17:59:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:46,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:47,332 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 17:59:47,332 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 93 treesize of output 92 [2022-03-01 17:59:47,908 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 17:59:47,909 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 80 treesize of output 86 [2022-03-01 17:59:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:48,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666153652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:48,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:48,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 17:59:48,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365275512] [2022-03-01 17:59:48,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:48,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 17:59:48,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 17:59:48,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2513, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:59:48,091 INFO L87 Difference]: Start difference. First operand 6428 states and 18937 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:03,928 INFO L93 Difference]: Finished difference Result 11542 states and 33129 transitions. [2022-03-01 18:00:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-01 18:00:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:00:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:03,946 INFO L225 Difference]: With dead ends: 11542 [2022-03-01 18:00:03,946 INFO L226 Difference]: Without dead ends: 11205 [2022-03-01 18:00:03,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14943 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=4543, Invalid=43637, Unknown=0, NotChecked=0, Total=48180 [2022-03-01 18:00:03,948 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 1919 mSDsluCounter, 6018 mSDsCounter, 0 mSdLazyCounter, 6935 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 4214 SdHoareTripleChecker+Invalid, 7379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 6935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:03,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 4214 Invalid, 7379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 6935 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:00:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2022-03-01 18:00:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 6441. [2022-03-01 18:00:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 2.946894409937888) internal successors, (18978), 6440 states have internal predecessors, (18978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 18978 transitions. [2022-03-01 18:00:04,080 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 18978 transitions. Word has length 37 [2022-03-01 18:00:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:04,080 INFO L470 AbstractCegarLoop]: Abstraction has 6441 states and 18978 transitions. [2022-03-01 18:00:04,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 18978 transitions. [2022-03-01 18:00:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:00:04,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:04,089 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, 1, 1, 1, 1, 1] [2022-03-01 18:00:04,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:04,296 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:00:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2089234039, now seen corresponding path program 20 times [2022-03-01 18:00:04,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:04,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726344490] [2022-03-01 18:00:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:04,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:04,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:04,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726344490] [2022-03-01 18:00:04,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726344490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:04,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151217007] [2022-03-01 18:00:04,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:04,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:04,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:04,662 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:04,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:00:04,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:04,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:04,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:04,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:05,038 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:00:05,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:00:05,268 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:00:05,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:00:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:05,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:06,243 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:00:06,243 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 93 treesize of output 92 [2022-03-01 18:00:06,826 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:00:06,827 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 80 treesize of output 86 [2022-03-01 18:00:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:07,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151217007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:07,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:07,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:00:07,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364779693] [2022-03-01 18:00:07,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:07,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:00:07,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:00:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:00:07,011 INFO L87 Difference]: Start difference. First operand 6441 states and 18978 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:25,217 INFO L93 Difference]: Finished difference Result 11859 states and 34068 transitions. [2022-03-01 18:00:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-03-01 18:00:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:00:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:25,238 INFO L225 Difference]: With dead ends: 11859 [2022-03-01 18:00:25,238 INFO L226 Difference]: Without dead ends: 11537 [2022-03-01 18:00:25,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16952 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=4682, Invalid=48910, Unknown=0, NotChecked=0, Total=53592 [2022-03-01 18:00:25,240 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 1826 mSDsluCounter, 8287 mSDsCounter, 0 mSdLazyCounter, 9414 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 5863 SdHoareTripleChecker+Invalid, 9814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 9414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:25,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1826 Valid, 5863 Invalid, 9814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 9414 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-01 18:00:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2022-03-01 18:00:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 6416. [2022-03-01 18:00:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 6415 states have (on average 2.9482462977396726) internal successors, (18913), 6415 states have internal predecessors, (18913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 18913 transitions. [2022-03-01 18:00:25,369 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 18913 transitions. Word has length 37 [2022-03-01 18:00:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:25,369 INFO L470 AbstractCegarLoop]: Abstraction has 6416 states and 18913 transitions. [2022-03-01 18:00:25,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 18913 transitions. [2022-03-01 18:00:25,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:00:25,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:25,379 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, 1, 1, 1, 1, 1] [2022-03-01 18:00:25,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:25,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:00:25,591 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:00:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash 25020101, now seen corresponding path program 21 times [2022-03-01 18:00:25,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:25,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436392706] [2022-03-01 18:00:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:25,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:25,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:25,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436392706] [2022-03-01 18:00:25,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436392706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:25,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332623970] [2022-03-01 18:00:25,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:25,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:25,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:25,971 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:25,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:00:26,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:00:26,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:26,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:26,376 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:00:26,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:00:26,681 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:00:26,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:00:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:26,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:27,627 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:00:27,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 92 [2022-03-01 18:00:28,185 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:00:28,185 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 80 treesize of output 86 [2022-03-01 18:00:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:28,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332623970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:28,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:28,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:00:28,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762446326] [2022-03-01 18:00:28,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:28,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:00:28,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:28,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:00:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2525, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:00:28,356 INFO L87 Difference]: Start difference. First operand 6416 states and 18913 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:48,810 INFO L93 Difference]: Finished difference Result 12319 states and 35542 transitions. [2022-03-01 18:00:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-01 18:00:48,810 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:00:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:48,832 INFO L225 Difference]: With dead ends: 12319 [2022-03-01 18:00:48,832 INFO L226 Difference]: Without dead ends: 12002 [2022-03-01 18:00:48,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18409 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=4971, Invalid=51435, Unknown=0, NotChecked=0, Total=56406 [2022-03-01 18:00:48,835 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1732 mSDsluCounter, 9175 mSDsCounter, 0 mSdLazyCounter, 10548 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 10969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 10548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:48,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 6544 Invalid, 10969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 10548 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-01 18:00:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2022-03-01 18:00:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 6346. [2022-03-01 18:00:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6346 states, 6345 states have (on average 2.9505122143420017) internal successors, (18721), 6345 states have internal predecessors, (18721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6346 states to 6346 states and 18721 transitions. [2022-03-01 18:00:48,979 INFO L78 Accepts]: Start accepts. Automaton has 6346 states and 18721 transitions. Word has length 37 [2022-03-01 18:00:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:48,979 INFO L470 AbstractCegarLoop]: Abstraction has 6346 states and 18721 transitions. [2022-03-01 18:00:48,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 6346 states and 18721 transitions. [2022-03-01 18:00:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:00:48,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:48,991 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, 1, 1, 1, 1, 1] [2022-03-01 18:00:49,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:49,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:00:49,209 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:00:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1170551961, now seen corresponding path program 22 times [2022-03-01 18:00:49,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:49,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474093827] [2022-03-01 18:00:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:49,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:49,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474093827] [2022-03-01 18:00:49,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474093827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:49,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613699431] [2022-03-01 18:00:49,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:49,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:49,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:49,566 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:49,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:00:49,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:49,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:00:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:49,977 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 18:00:49,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-03-01 18:00:50,208 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:00:50,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:00:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:50,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:51,200 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:00:51,200 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 93 treesize of output 92 [2022-03-01 18:00:51,788 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:00:51,788 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 80 treesize of output 86 [2022-03-01 18:00:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:51,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613699431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:51,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:51,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:00:51,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814877399] [2022-03-01 18:00:51,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:51,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:00:51,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:00:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:00:51,963 INFO L87 Difference]: Start difference. First operand 6346 states and 18721 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:08,472 INFO L93 Difference]: Finished difference Result 11763 states and 33828 transitions. [2022-03-01 18:01:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-03-01 18:01:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:01:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:08,494 INFO L225 Difference]: With dead ends: 11763 [2022-03-01 18:01:08,494 INFO L226 Difference]: Without dead ends: 11441 [2022-03-01 18:01:08,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16063 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=4609, Invalid=46693, Unknown=0, NotChecked=0, Total=51302 [2022-03-01 18:01:08,497 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1942 mSDsluCounter, 6603 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 4698 SdHoareTripleChecker+Invalid, 7731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:08,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1942 Valid, 4698 Invalid, 7731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-01 18:01:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11441 states. [2022-03-01 18:01:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11441 to 6322. [2022-03-01 18:01:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6322 states, 6321 states have (on average 2.950482518588831) internal successors, (18650), 6321 states have internal predecessors, (18650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6322 states to 6322 states and 18650 transitions. [2022-03-01 18:01:08,649 INFO L78 Accepts]: Start accepts. Automaton has 6322 states and 18650 transitions. Word has length 37 [2022-03-01 18:01:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:08,650 INFO L470 AbstractCegarLoop]: Abstraction has 6322 states and 18650 transitions. [2022-03-01 18:01:08,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 6322 states and 18650 transitions. [2022-03-01 18:01:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:01:08,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:08,660 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, 1, 1, 1, 1, 1] [2022-03-01 18:01:08,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:08,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 18:01:08,873 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:08,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1010161195, now seen corresponding path program 23 times [2022-03-01 18:01:08,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:08,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611887254] [2022-03-01 18:01:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:08,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:09,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:09,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611887254] [2022-03-01 18:01:09,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611887254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:09,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897218455] [2022-03-01 18:01:09,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:01:09,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:09,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:09,240 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:09,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:01:09,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:01:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 18:01:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:09,654 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:09,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:01:09,960 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:09,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2022-03-01 18:01:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:10,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:10,725 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:01:10,725 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 88 treesize of output 87 [2022-03-01 18:01:11,155 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:01:11,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 77 [2022-03-01 18:01:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:11,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897218455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:11,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:11,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 51 [2022-03-01 18:01:11,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096771315] [2022-03-01 18:01:11,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:11,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-01 18:01:11,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:11,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-01 18:01:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2388, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:01:11,293 INFO L87 Difference]: Start difference. First operand 6322 states and 18650 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:23,086 INFO L93 Difference]: Finished difference Result 11071 states and 31959 transitions. [2022-03-01 18:01:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-01 18:01:23,087 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:01:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:23,107 INFO L225 Difference]: With dead ends: 11071 [2022-03-01 18:01:23,107 INFO L226 Difference]: Without dead ends: 10884 [2022-03-01 18:01:23,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10689 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3634, Invalid=29308, Unknown=0, NotChecked=0, Total=32942 [2022-03-01 18:01:23,109 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1310 mSDsluCounter, 3949 mSDsCounter, 0 mSdLazyCounter, 5010 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 5383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 5010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:23,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 2620 Invalid, 5383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 5010 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 18:01:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10884 states. [2022-03-01 18:01:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10884 to 6291. [2022-03-01 18:01:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6291 states, 6290 states have (on average 2.9481717011128774) internal successors, (18544), 6290 states have internal predecessors, (18544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 18544 transitions. [2022-03-01 18:01:23,237 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 18544 transitions. Word has length 37 [2022-03-01 18:01:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:23,237 INFO L470 AbstractCegarLoop]: Abstraction has 6291 states and 18544 transitions. [2022-03-01 18:01:23,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 18544 transitions. [2022-03-01 18:01:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:01:23,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:23,246 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, 1, 1, 1, 1, 1] [2022-03-01 18:01:23,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:23,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:23,447 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash -687759509, now seen corresponding path program 24 times [2022-03-01 18:01:23,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:23,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724115200] [2022-03-01 18:01:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:23,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:23,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:23,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724115200] [2022-03-01 18:01:23,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724115200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:23,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475763722] [2022-03-01 18:01:23,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:01:23,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:23,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:23,869 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:23,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:01:23,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:01:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:01:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:24,285 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:24,286 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 27 treesize of output 15 [2022-03-01 18:01:24,547 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:24,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-03-01 18:01:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:24,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:25,405 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:01:25,406 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 89 treesize of output 88 [2022-03-01 18:01:25,922 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:01:25,923 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 75 treesize of output 83 [2022-03-01 18:01:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:26,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475763722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:26,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:26,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 18:01:26,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959147542] [2022-03-01 18:01:26,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:26,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:01:26,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:01:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2710, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:01:26,105 INFO L87 Difference]: Start difference. First operand 6291 states and 18544 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:37,132 INFO L93 Difference]: Finished difference Result 18585 states and 54510 transitions. [2022-03-01 18:01:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-01 18:01:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:01:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:37,173 INFO L225 Difference]: With dead ends: 18585 [2022-03-01 18:01:37,174 INFO L226 Difference]: Without dead ends: 18313 [2022-03-01 18:01:37,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11506 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4479, Invalid=30677, Unknown=0, NotChecked=0, Total=35156 [2022-03-01 18:01:37,177 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 2899 mSDsluCounter, 9316 mSDsCounter, 0 mSdLazyCounter, 9147 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2899 SdHoareTripleChecker+Valid, 6590 SdHoareTripleChecker+Invalid, 9641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 9147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:37,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2899 Valid, 6590 Invalid, 9641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 9147 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-01 18:01:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18313 states. [2022-03-01 18:01:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18313 to 6657. [2022-03-01 18:01:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 2.968449519230769) internal successors, (19758), 6656 states have internal predecessors, (19758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 19758 transitions. [2022-03-01 18:01:37,388 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 19758 transitions. Word has length 37 [2022-03-01 18:01:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:37,388 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 19758 transitions. [2022-03-01 18:01:37,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 19758 transitions. [2022-03-01 18:01:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:01:37,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:37,399 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, 1, 1, 1, 1, 1] [2022-03-01 18:01:37,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:37,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:37,604 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:37,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1008546731, now seen corresponding path program 25 times [2022-03-01 18:01:37,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:37,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557322884] [2022-03-01 18:01:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:37,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:37,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:37,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557322884] [2022-03-01 18:01:37,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557322884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:37,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102097895] [2022-03-01 18:01:37,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:01:37,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:37,958 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:37,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:01:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:01:37,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:38,384 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 18:01:38,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 18:01:38,615 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:38,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:01:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:38,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:39,584 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:01:39,585 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 93 treesize of output 92 [2022-03-01 18:01:40,188 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:01:40,189 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 85 treesize of output 91 [2022-03-01 18:01:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:40,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102097895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:40,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:40,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:01:40,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626711839] [2022-03-01 18:01:40,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:40,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:01:40,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:40,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:01:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2527, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:01:40,419 INFO L87 Difference]: Start difference. First operand 6657 states and 19758 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:57,075 INFO L93 Difference]: Finished difference Result 11546 states and 33371 transitions. [2022-03-01 18:01:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-01 18:01:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:01:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:57,097 INFO L225 Difference]: With dead ends: 11546 [2022-03-01 18:01:57,098 INFO L226 Difference]: Without dead ends: 11236 [2022-03-01 18:01:57,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16259 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=4464, Invalid=47292, Unknown=0, NotChecked=0, Total=51756 [2022-03-01 18:01:57,101 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 2055 mSDsluCounter, 7112 mSDsCounter, 0 mSdLazyCounter, 7987 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 4980 SdHoareTripleChecker+Invalid, 8410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 7987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:57,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2055 Valid, 4980 Invalid, 8410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 7987 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-01 18:01:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11236 states. [2022-03-01 18:01:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11236 to 6798. [2022-03-01 18:01:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6798 states, 6797 states have (on average 2.967927026629395) internal successors, (20173), 6797 states have internal predecessors, (20173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6798 states to 6798 states and 20173 transitions. [2022-03-01 18:01:57,254 INFO L78 Accepts]: Start accepts. Automaton has 6798 states and 20173 transitions. Word has length 37 [2022-03-01 18:01:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:57,254 INFO L470 AbstractCegarLoop]: Abstraction has 6798 states and 20173 transitions. [2022-03-01 18:01:57,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6798 states and 20173 transitions. [2022-03-01 18:01:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:01:57,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:57,265 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, 1, 1, 1, 1, 1] [2022-03-01 18:01:57,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:57,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:57,465 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:01:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:57,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1172166425, now seen corresponding path program 26 times [2022-03-01 18:01:57,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:57,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381319028] [2022-03-01 18:01:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:57,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:57,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:57,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381319028] [2022-03-01 18:01:57,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381319028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:57,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044285282] [2022-03-01 18:01:57,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:57,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:57,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:57,821 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:57,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:01:57,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:57,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:58,214 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:58,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:01:58,506 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:01:58,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:01:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:59,466 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:01:59,467 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 93 treesize of output 92 [2022-03-01 18:02:00,015 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:02:00,015 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 80 treesize of output 86 [2022-03-01 18:02:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:00,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044285282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:00,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:00,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:02:00,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256977653] [2022-03-01 18:02:00,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:00,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:02:00,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:02:00,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:02:00,195 INFO L87 Difference]: Start difference. First operand 6798 states and 20173 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:18,015 INFO L93 Difference]: Finished difference Result 12170 states and 35352 transitions. [2022-03-01 18:02:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-03-01 18:02:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:02:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:18,037 INFO L225 Difference]: With dead ends: 12170 [2022-03-01 18:02:18,037 INFO L226 Difference]: Without dead ends: 11813 [2022-03-01 18:02:18,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16418 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=4442, Invalid=47314, Unknown=0, NotChecked=0, Total=51756 [2022-03-01 18:02:18,040 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 1801 mSDsluCounter, 8367 mSDsCounter, 0 mSdLazyCounter, 9427 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 5960 SdHoareTripleChecker+Invalid, 9849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 9427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:18,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 5960 Invalid, 9849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 9427 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-01 18:02:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11813 states. [2022-03-01 18:02:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11813 to 6787. [2022-03-01 18:02:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6787 states, 6786 states have (on average 2.967285587975243) internal successors, (20136), 6786 states have internal predecessors, (20136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6787 states to 6787 states and 20136 transitions. [2022-03-01 18:02:18,193 INFO L78 Accepts]: Start accepts. Automaton has 6787 states and 20136 transitions. Word has length 37 [2022-03-01 18:02:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:18,194 INFO L470 AbstractCegarLoop]: Abstraction has 6787 states and 20136 transitions. [2022-03-01 18:02:18,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6787 states and 20136 transitions. [2022-03-01 18:02:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:02:18,204 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:18,204 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, 1, 1, 1, 1, 1] [2022-03-01 18:02:18,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:18,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-01 18:02:18,405 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:18,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1915929721, now seen corresponding path program 27 times [2022-03-01 18:02:18,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:18,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630726513] [2022-03-01 18:02:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:18,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:18,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:18,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630726513] [2022-03-01 18:02:18,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630726513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:18,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817495910] [2022-03-01 18:02:18,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:18,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:18,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:18,796 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:18,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:02:18,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:02:18,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:18,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:02:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:19,295 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:19,296 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 25 treesize of output 13 [2022-03-01 18:02:19,576 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:19,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:02:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:19,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:20,524 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:02:20,524 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 93 treesize of output 92 [2022-03-01 18:02:21,145 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:02:21,145 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 80 treesize of output 86 [2022-03-01 18:02:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:21,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817495910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:21,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:21,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:02:21,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142055030] [2022-03-01 18:02:21,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:21,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:02:21,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:21,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:02:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2530, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:02:21,346 INFO L87 Difference]: Start difference. First operand 6787 states and 20136 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:39,082 INFO L93 Difference]: Finished difference Result 12474 states and 36149 transitions. [2022-03-01 18:02:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-03-01 18:02:39,083 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:02:39,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:39,105 INFO L225 Difference]: With dead ends: 12474 [2022-03-01 18:02:39,106 INFO L226 Difference]: Without dead ends: 12186 [2022-03-01 18:02:39,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15808 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=4357, Invalid=46493, Unknown=0, NotChecked=0, Total=50850 [2022-03-01 18:02:39,108 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 1554 mSDsluCounter, 10651 mSDsCounter, 0 mSdLazyCounter, 11304 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 7541 SdHoareTripleChecker+Invalid, 11641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 11304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:39,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 7541 Invalid, 11641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 11304 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-01 18:02:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12186 states. [2022-03-01 18:02:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12186 to 6805. [2022-03-01 18:02:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6805 states, 6804 states have (on average 2.965461493239271) internal successors, (20177), 6804 states have internal predecessors, (20177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6805 states to 6805 states and 20177 transitions. [2022-03-01 18:02:39,260 INFO L78 Accepts]: Start accepts. Automaton has 6805 states and 20177 transitions. Word has length 37 [2022-03-01 18:02:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:39,260 INFO L470 AbstractCegarLoop]: Abstraction has 6805 states and 20177 transitions. [2022-03-01 18:02:39,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6805 states and 20177 transitions. [2022-03-01 18:02:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:02:39,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:39,270 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, 1, 1, 1, 1, 1] [2022-03-01 18:02:39,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:39,471 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:39,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1139543749, now seen corresponding path program 28 times [2022-03-01 18:02:39,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:39,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698085795] [2022-03-01 18:02:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:39,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:39,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:39,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698085795] [2022-03-01 18:02:39,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698085795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:39,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402108216] [2022-03-01 18:02:39,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:39,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:39,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:39,838 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:39,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:02:39,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:39,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:39,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:02:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:40,240 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 18:02:40,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 18:02:40,548 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:40,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:02:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:40,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:41,509 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:02:41,509 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 93 treesize of output 92 [2022-03-01 18:02:42,123 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:02:42,123 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 80 treesize of output 86 [2022-03-01 18:02:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:42,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402108216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:42,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:42,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:02:42,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132089199] [2022-03-01 18:02:42,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:42,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:02:42,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:42,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:02:42,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2530, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:02:42,319 INFO L87 Difference]: Start difference. First operand 6805 states and 20177 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:57,051 INFO L93 Difference]: Finished difference Result 11931 states and 34497 transitions. [2022-03-01 18:02:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-01 18:02:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:02:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:57,071 INFO L225 Difference]: With dead ends: 11931 [2022-03-01 18:02:57,071 INFO L226 Difference]: Without dead ends: 11636 [2022-03-01 18:02:57,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11663 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=3622, Invalid=36178, Unknown=0, NotChecked=0, Total=39800 [2022-03-01 18:02:57,073 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 1618 mSDsluCounter, 8039 mSDsCounter, 0 mSdLazyCounter, 8814 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 5725 SdHoareTripleChecker+Invalid, 9168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 8814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:57,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 5725 Invalid, 9168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 8814 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-01 18:02:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11636 states. [2022-03-01 18:02:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11636 to 6738. [2022-03-01 18:02:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 2.9648211370046016) internal successors, (19974), 6737 states have internal predecessors, (19974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 19974 transitions. [2022-03-01 18:02:57,201 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 19974 transitions. Word has length 37 [2022-03-01 18:02:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:57,201 INFO L470 AbstractCegarLoop]: Abstraction has 6738 states and 19974 transitions. [2022-03-01 18:02:57,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 19974 transitions. [2022-03-01 18:02:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:02:57,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:57,211 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, 1, 1, 1, 1, 1] [2022-03-01 18:02:57,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:57,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:57,411 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:02:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash -300799283, now seen corresponding path program 29 times [2022-03-01 18:02:57,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:57,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986711348] [2022-03-01 18:02:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:57,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:57,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986711348] [2022-03-01 18:02:57,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986711348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:57,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922308037] [2022-03-01 18:02:57,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:02:57,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:57,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:57,823 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:57,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:02:57,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:02:57,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 18:02:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:58,193 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:02:58,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:02:58,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:58,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:58,527 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 36 treesize of output 20 [2022-03-01 18:02:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:58,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:59,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:59,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:59,384 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 81 treesize of output 93 [2022-03-01 18:03:00,078 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:03:00,079 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 85 treesize of output 93 [2022-03-01 18:03:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:00,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922308037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:00,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:00,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 18:03:00,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625206311] [2022-03-01 18:03:00,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:00,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:03:00,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:03:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:03:00,288 INFO L87 Difference]: Start difference. First operand 6738 states and 19974 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:15,386 INFO L93 Difference]: Finished difference Result 18781 states and 54868 transitions. [2022-03-01 18:03:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-03-01 18:03:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:03:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:15,426 INFO L225 Difference]: With dead ends: 18781 [2022-03-01 18:03:15,426 INFO L226 Difference]: Without dead ends: 18582 [2022-03-01 18:03:15,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25342 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=9099, Invalid=55163, Unknown=0, NotChecked=0, Total=64262 [2022-03-01 18:03:15,429 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 3097 mSDsluCounter, 5733 mSDsCounter, 0 mSdLazyCounter, 6410 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3097 SdHoareTripleChecker+Valid, 3912 SdHoareTripleChecker+Invalid, 7049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 6410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:15,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3097 Valid, 3912 Invalid, 7049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 6410 Invalid, 0 Unknown, 91 Unchecked, 3.0s Time] [2022-03-01 18:03:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18582 states. [2022-03-01 18:03:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18582 to 6936. [2022-03-01 18:03:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6935 states have (on average 2.959048305695746) internal successors, (20521), 6935 states have internal predecessors, (20521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 20521 transitions. [2022-03-01 18:03:15,676 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 20521 transitions. Word has length 37 [2022-03-01 18:03:15,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:15,676 INFO L470 AbstractCegarLoop]: Abstraction has 6936 states and 20521 transitions. [2022-03-01 18:03:15,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 20521 transitions. [2022-03-01 18:03:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:03:15,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:15,687 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, 1, 1, 1, 1, 1] [2022-03-01 18:03:15,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 18:03:15,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 18:03:15,889 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:03:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1395506957, now seen corresponding path program 30 times [2022-03-01 18:03:15,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:15,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850034096] [2022-03-01 18:03:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:15,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:16,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:16,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850034096] [2022-03-01 18:03:16,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850034096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:16,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565515329] [2022-03-01 18:03:16,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:03:16,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:16,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:16,247 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:16,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:03:16,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:03:16,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:03:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:03:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:16,600 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:03:16,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:03:16,867 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:03:16,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-03-01 18:03:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:17,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:17,819 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:03:17,819 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 88 treesize of output 87 [2022-03-01 18:03:18,430 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:03:18,431 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 75 treesize of output 83 [2022-03-01 18:03:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:18,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565515329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:18,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:18,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:03:18,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257668305] [2022-03-01 18:03:18,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:18,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:03:18,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:03:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:03:18,643 INFO L87 Difference]: Start difference. First operand 6936 states and 20521 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:38,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:38,668 INFO L93 Difference]: Finished difference Result 12156 states and 34872 transitions. [2022-03-01 18:03:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2022-03-01 18:03:38,668 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:03:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:38,688 INFO L225 Difference]: With dead ends: 12156 [2022-03-01 18:03:38,688 INFO L226 Difference]: Without dead ends: 11850 [2022-03-01 18:03:38,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21205 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=7083, Invalid=56673, Unknown=0, NotChecked=0, Total=63756 [2022-03-01 18:03:38,691 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 2041 mSDsluCounter, 8680 mSDsCounter, 0 mSdLazyCounter, 10136 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 5867 SdHoareTripleChecker+Invalid, 10568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 10136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:38,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2041 Valid, 5867 Invalid, 10568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 10136 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-01 18:03:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2022-03-01 18:03:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 7020. [2022-03-01 18:03:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7020 states, 7019 states have (on average 2.9542669895996583) internal successors, (20736), 7019 states have internal predecessors, (20736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7020 states to 7020 states and 20736 transitions. [2022-03-01 18:03:38,829 INFO L78 Accepts]: Start accepts. Automaton has 7020 states and 20736 transitions. Word has length 37 [2022-03-01 18:03:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:38,829 INFO L470 AbstractCegarLoop]: Abstraction has 7020 states and 20736 transitions. [2022-03-01 18:03:38,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 7020 states and 20736 transitions. [2022-03-01 18:03:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:03:38,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:38,839 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, 1, 1, 1, 1, 1] [2022-03-01 18:03:38,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 18:03:39,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:03:39,043 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:03:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1052617481, now seen corresponding path program 31 times [2022-03-01 18:03:39,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:39,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475657353] [2022-03-01 18:03:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:39,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:39,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475657353] [2022-03-01 18:03:39,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475657353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:39,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041734051] [2022-03-01 18:03:39,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:03:39,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:39,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:39,476 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:39,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:03:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:39,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:03:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:39,825 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 18:03:39,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-03-01 18:03:40,091 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:03:40,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:03:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:40,968 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:03:40,969 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 91 treesize of output 90 [2022-03-01 18:03:41,550 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:03:41,550 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 85 treesize of output 91 [2022-03-01 18:03:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:41,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041734051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:41,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:41,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 18:03:41,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630210722] [2022-03-01 18:03:41,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:41,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:03:41,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:03:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2704, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:03:41,805 INFO L87 Difference]: Start difference. First operand 7020 states and 20736 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:03:54,462 INFO L93 Difference]: Finished difference Result 16450 states and 48110 transitions. [2022-03-01 18:03:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-03-01 18:03:54,463 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:03:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:03:54,498 INFO L225 Difference]: With dead ends: 16450 [2022-03-01 18:03:54,499 INFO L226 Difference]: Without dead ends: 16239 [2022-03-01 18:03:54,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14006 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5024, Invalid=35982, Unknown=0, NotChecked=0, Total=41006 [2022-03-01 18:03:54,501 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 3019 mSDsluCounter, 9044 mSDsCounter, 0 mSdLazyCounter, 8770 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3019 SdHoareTripleChecker+Valid, 6299 SdHoareTripleChecker+Invalid, 9284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 8770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:03:54,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3019 Valid, 6299 Invalid, 9284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 8770 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-01 18:03:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16239 states. [2022-03-01 18:03:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16239 to 7017. [2022-03-01 18:03:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 2.9543899657924744) internal successors, (20728), 7016 states have internal predecessors, (20728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 20728 transitions. [2022-03-01 18:03:54,683 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 20728 transitions. Word has length 37 [2022-03-01 18:03:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:03:54,683 INFO L470 AbstractCegarLoop]: Abstraction has 7017 states and 20728 transitions. [2022-03-01 18:03:54,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:03:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 20728 transitions. [2022-03-01 18:03:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:03:54,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:03:54,693 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, 1, 1, 1, 1, 1] [2022-03-01 18:03:54,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 18:03:54,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:03:54,896 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:03:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:03:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1546043575, now seen corresponding path program 32 times [2022-03-01 18:03:54,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:03:54,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746505222] [2022-03-01 18:03:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:03:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:03:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:03:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:55,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:03:55,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746505222] [2022-03-01 18:03:55,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746505222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:03:55,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436676418] [2022-03-01 18:03:55,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:03:55,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:03:55,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:03:55,258 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:03:55,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:03:55,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:03:55,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:03:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:03:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:03:55,609 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:03:55,609 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 27 treesize of output 15 [2022-03-01 18:03:55,873 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:03:55,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:03:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:56,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:03:56,867 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:03:56,867 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 93 treesize of output 92 [2022-03-01 18:03:57,436 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:03:57,437 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 80 treesize of output 86 [2022-03-01 18:03:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:03:57,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436676418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:03:57,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:03:57,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:03:57,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315636274] [2022-03-01 18:03:57,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:03:57,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:03:57,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:03:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:03:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:03:57,647 INFO L87 Difference]: Start difference. First operand 7017 states and 20728 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:14,143 INFO L93 Difference]: Finished difference Result 11745 states and 33931 transitions. [2022-03-01 18:04:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-03-01 18:04:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:04:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:14,164 INFO L225 Difference]: With dead ends: 11745 [2022-03-01 18:04:14,164 INFO L226 Difference]: Without dead ends: 11496 [2022-03-01 18:04:14,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13802 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4322, Invalid=40410, Unknown=0, NotChecked=0, Total=44732 [2022-03-01 18:04:14,167 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1826 mSDsluCounter, 8589 mSDsCounter, 0 mSdLazyCounter, 9400 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 5881 SdHoareTripleChecker+Invalid, 9765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 9400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:14,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1826 Valid, 5881 Invalid, 9765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 9400 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-01 18:04:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2022-03-01 18:04:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 7113. [2022-03-01 18:04:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7113 states, 7112 states have (on average 2.952896512935883) internal successors, (21001), 7112 states have internal predecessors, (21001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 21001 transitions. [2022-03-01 18:04:14,307 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 21001 transitions. Word has length 37 [2022-03-01 18:04:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:14,307 INFO L470 AbstractCegarLoop]: Abstraction has 7113 states and 21001 transitions. [2022-03-01 18:04:14,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 21001 transitions. [2022-03-01 18:04:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:04:14,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:14,317 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, 1, 1, 1, 1, 1] [2022-03-01 18:04:14,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:14,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:04:14,518 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:04:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 568210565, now seen corresponding path program 33 times [2022-03-01 18:04:14,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:14,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178358155] [2022-03-01 18:04:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:14,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:14,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:14,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178358155] [2022-03-01 18:04:14,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178358155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:14,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437607067] [2022-03-01 18:04:14,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:04:14,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:14,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:14,876 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:14,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:04:14,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:04:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:04:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:04:14,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:15,238 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:15,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:04:15,442 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:15,442 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 39 treesize of output 23 [2022-03-01 18:04:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:15,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:16,124 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:16,124 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 82 treesize of output 88 [2022-03-01 18:04:16,527 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:04:16,527 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 70 treesize of output 75 [2022-03-01 18:04:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:16,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437607067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:16,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:16,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 48 [2022-03-01 18:04:16,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62859455] [2022-03-01 18:04:16,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:16,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:04:16,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:04:16,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2158, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:04:16,668 INFO L87 Difference]: Start difference. First operand 7113 states and 21001 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:23,963 INFO L93 Difference]: Finished difference Result 11081 states and 32428 transitions. [2022-03-01 18:04:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:04:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:04:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:23,983 INFO L225 Difference]: With dead ends: 11081 [2022-03-01 18:04:23,983 INFO L226 Difference]: Without dead ends: 10811 [2022-03-01 18:04:23,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4330 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1501, Invalid=15269, Unknown=0, NotChecked=0, Total=16770 [2022-03-01 18:04:23,984 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 1265 mSDsluCounter, 6160 mSDsCounter, 0 mSdLazyCounter, 6396 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 4351 SdHoareTripleChecker+Invalid, 6669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 6396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:23,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1265 Valid, 4351 Invalid, 6669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 6396 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-01 18:04:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10811 states. [2022-03-01 18:04:24,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10811 to 7077. [2022-03-01 18:04:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 2.951950254381006) internal successors, (20888), 7076 states have internal predecessors, (20888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 20888 transitions. [2022-03-01 18:04:24,122 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 20888 transitions. Word has length 37 [2022-03-01 18:04:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:24,122 INFO L470 AbstractCegarLoop]: Abstraction has 7077 states and 20888 transitions. [2022-03-01 18:04:24,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 20888 transitions. [2022-03-01 18:04:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:04:24,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:24,132 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, 1, 1, 1, 1, 1] [2022-03-01 18:04:24,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:24,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:04:24,333 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:04:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:24,333 INFO L85 PathProgramCache]: Analyzing trace with hash -80374157, now seen corresponding path program 34 times [2022-03-01 18:04:24,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:24,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715139878] [2022-03-01 18:04:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:24,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:24,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:24,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715139878] [2022-03-01 18:04:24,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715139878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:24,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952153161] [2022-03-01 18:04:24,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:04:24,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:24,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:24,702 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:24,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:04:24,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:04:24,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:04:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:04:24,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:25,075 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:25,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:04:25,333 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:25,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:04:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:25,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:26,206 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:04:26,207 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 91 treesize of output 90 [2022-03-01 18:04:26,766 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:26,766 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 80 treesize of output 86 [2022-03-01 18:04:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:26,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952153161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:26,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:26,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 18:04:26,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403777948] [2022-03-01 18:04:26,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:26,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:04:26,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:26,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:04:26,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2704, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:04:26,981 INFO L87 Difference]: Start difference. First operand 7077 states and 20888 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:42,006 INFO L93 Difference]: Finished difference Result 17196 states and 50548 transitions. [2022-03-01 18:04:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-03-01 18:04:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:04:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:42,040 INFO L225 Difference]: With dead ends: 17196 [2022-03-01 18:04:42,040 INFO L226 Difference]: Without dead ends: 16661 [2022-03-01 18:04:42,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16885 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=5792, Invalid=42388, Unknown=0, NotChecked=0, Total=48180 [2022-03-01 18:04:42,043 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 2704 mSDsluCounter, 12495 mSDsCounter, 0 mSdLazyCounter, 11862 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 8537 SdHoareTripleChecker+Invalid, 12338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 11862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:42,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2704 Valid, 8537 Invalid, 12338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 11862 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-01 18:04:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16661 states. [2022-03-01 18:04:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16661 to 7470. [2022-03-01 18:04:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 7469 states have (on average 2.955951265229616) internal successors, (22078), 7469 states have internal predecessors, (22078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 22078 transitions. [2022-03-01 18:04:42,236 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 22078 transitions. Word has length 37 [2022-03-01 18:04:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:42,236 INFO L470 AbstractCegarLoop]: Abstraction has 7470 states and 22078 transitions. [2022-03-01 18:04:42,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 22078 transitions. [2022-03-01 18:04:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:04:42,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:42,247 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, 1, 1, 1, 1, 1] [2022-03-01 18:04:42,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:42,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-01 18:04:42,447 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:04:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1615932083, now seen corresponding path program 35 times [2022-03-01 18:04:42,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:42,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988468314] [2022-03-01 18:04:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:42,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:42,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:42,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988468314] [2022-03-01 18:04:42,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988468314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:42,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658689500] [2022-03-01 18:04:42,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:04:42,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:42,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:42,772 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:42,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:04:42,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:04:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:04:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:04:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:43,114 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:43,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:04:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:04:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:04:43,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:04:43,502 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 25 treesize of output 17 [2022-03-01 18:04:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:44,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:04:44,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:04:44,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:04:44,692 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 81 treesize of output 93 [2022-03-01 18:04:45,514 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:45,514 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 100 treesize of output 106 [2022-03-01 18:04:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:45,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658689500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:45,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:45,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:04:45,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409380971] [2022-03-01 18:04:45,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:45,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:04:45,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:04:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:04:45,749 INFO L87 Difference]: Start difference. First operand 7470 states and 22078 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:50,426 INFO L93 Difference]: Finished difference Result 9676 states and 28076 transitions. [2022-03-01 18:04:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 18:04:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:04:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:50,447 INFO L225 Difference]: With dead ends: 9676 [2022-03-01 18:04:50,447 INFO L226 Difference]: Without dead ends: 9636 [2022-03-01 18:04:50,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1277, Invalid=12765, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:04:50,448 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 647 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 945 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:50,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1717 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1337 Invalid, 0 Unknown, 945 Unchecked, 0.5s Time] [2022-03-01 18:04:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2022-03-01 18:04:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 7587. [2022-03-01 18:04:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7587 states, 7586 states have (on average 2.9532032691800687) internal successors, (22403), 7586 states have internal predecessors, (22403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7587 states to 7587 states and 22403 transitions. [2022-03-01 18:04:50,577 INFO L78 Accepts]: Start accepts. Automaton has 7587 states and 22403 transitions. Word has length 37 [2022-03-01 18:04:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 7587 states and 22403 transitions. [2022-03-01 18:04:50,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 7587 states and 22403 transitions. [2022-03-01 18:04:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:04:50,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:50,588 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, 1, 1, 1, 1, 1] [2022-03-01 18:04:50,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:50,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-01 18:04:50,790 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:04:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -989092309, now seen corresponding path program 36 times [2022-03-01 18:04:50,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:50,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277212893] [2022-03-01 18:04:50,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:50,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:51,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:51,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277212893] [2022-03-01 18:04:51,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277212893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:51,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069910504] [2022-03-01 18:04:51,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:04:51,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:51,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:51,150 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:51,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:04:51,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:04:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:04:51,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:04:51,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:51,499 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:51,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:04:51,819 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:51,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2022-03-01 18:04:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:51,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:52,370 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:52,370 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 76 treesize of output 92 [2022-03-01 18:04:52,919 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:52,920 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 79 treesize of output 91 [2022-03-01 18:04:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:53,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069910504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:53,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:53,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 47 [2022-03-01 18:04:53,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841992733] [2022-03-01 18:04:53,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:53,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:04:53,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:04:53,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2076, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:04:53,175 INFO L87 Difference]: Start difference. First operand 7587 states and 22403 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:04:55,736 INFO L93 Difference]: Finished difference Result 9022 states and 26107 transitions. [2022-03-01 18:04:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:04:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:04:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:04:55,755 INFO L225 Difference]: With dead ends: 9022 [2022-03-01 18:04:55,755 INFO L226 Difference]: Without dead ends: 8992 [2022-03-01 18:04:55,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=436, Invalid=5114, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:04:55,756 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 450 mSDsluCounter, 3103 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 3578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:04:55,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 2095 Invalid, 3578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:04:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8992 states. [2022-03-01 18:04:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8992 to 7784. [2022-03-01 18:04:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 7783 states have (on average 2.9493768469741743) internal successors, (22955), 7783 states have internal predecessors, (22955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 22955 transitions. [2022-03-01 18:04:55,903 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 22955 transitions. Word has length 37 [2022-03-01 18:04:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:04:55,904 INFO L470 AbstractCegarLoop]: Abstraction has 7784 states and 22955 transitions. [2022-03-01 18:04:55,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:04:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 22955 transitions. [2022-03-01 18:04:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:04:55,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:04:55,916 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, 1, 1, 1, 1, 1] [2022-03-01 18:04:55,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 18:04:56,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 18:04:56,117 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:04:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:04:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1100376563, now seen corresponding path program 37 times [2022-03-01 18:04:56,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:04:56,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231816740] [2022-03-01 18:04:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:04:56,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:04:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:56,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:04:56,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231816740] [2022-03-01 18:04:56,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231816740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:04:56,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121296876] [2022-03-01 18:04:56,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:04:56,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:04:56,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:04:56,491 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:04:56,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:04:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:04:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:04:56,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:04:56,832 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 18:04:56,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-03-01 18:04:57,097 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:04:57,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:04:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:57,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:58,006 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:04:58,006 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 91 treesize of output 90 [2022-03-01 18:04:58,561 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:04:58,561 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 85 treesize of output 91 [2022-03-01 18:04:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:04:58,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121296876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:04:58,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:04:58,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 18:04:58,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073492818] [2022-03-01 18:04:58,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:04:58,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:04:58,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:04:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:04:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2689, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:04:58,773 INFO L87 Difference]: Start difference. First operand 7784 states and 22955 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:11,774 INFO L93 Difference]: Finished difference Result 19763 states and 57822 transitions. [2022-03-01 18:05:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-03-01 18:05:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:05:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:11,819 INFO L225 Difference]: With dead ends: 19763 [2022-03-01 18:05:11,820 INFO L226 Difference]: Without dead ends: 19689 [2022-03-01 18:05:11,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17146 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=6701, Invalid=40171, Unknown=0, NotChecked=0, Total=46872 [2022-03-01 18:05:11,822 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 3196 mSDsluCounter, 6801 mSDsCounter, 0 mSdLazyCounter, 6588 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 4824 SdHoareTripleChecker+Invalid, 7212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 6588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:11,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3196 Valid, 4824 Invalid, 7212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 6588 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:05:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19689 states. [2022-03-01 18:05:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19689 to 7786. [2022-03-01 18:05:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7786 states, 7785 states have (on average 2.9493898522800257) internal successors, (22961), 7785 states have internal predecessors, (22961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7786 states to 7786 states and 22961 transitions. [2022-03-01 18:05:12,077 INFO L78 Accepts]: Start accepts. Automaton has 7786 states and 22961 transitions. Word has length 37 [2022-03-01 18:05:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:12,077 INFO L470 AbstractCegarLoop]: Abstraction has 7786 states and 22961 transitions. [2022-03-01 18:05:12,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 7786 states and 22961 transitions. [2022-03-01 18:05:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:05:12,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:12,089 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, 1, 1, 1, 1, 1] [2022-03-01 18:05:12,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:12,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:12,290 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:05:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:12,290 INFO L85 PathProgramCache]: Analyzing trace with hash 658914099, now seen corresponding path program 38 times [2022-03-01 18:05:12,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:12,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154461886] [2022-03-01 18:05:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:12,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:12,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:12,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154461886] [2022-03-01 18:05:12,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154461886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:12,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444368547] [2022-03-01 18:05:12,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:05:12,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:12,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:12,697 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:12,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:05:12,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:05:12,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:05:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:13,044 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:13,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:05:13,320 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:13,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:05:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:13,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:14,267 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:05:14,268 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 91 treesize of output 90 [2022-03-01 18:05:14,877 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:05:14,877 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 85 treesize of output 91 [2022-03-01 18:05:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:15,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444368547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:15,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:15,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 18:05:15,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623090662] [2022-03-01 18:05:15,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:15,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:05:15,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:05:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2696, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:05:15,057 INFO L87 Difference]: Start difference. First operand 7786 states and 22961 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:29,291 INFO L93 Difference]: Finished difference Result 20854 states and 60966 transitions. [2022-03-01 18:05:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-01 18:05:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:05:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:29,399 INFO L225 Difference]: With dead ends: 20854 [2022-03-01 18:05:29,399 INFO L226 Difference]: Without dead ends: 20654 [2022-03-01 18:05:29,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20060 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=7496, Invalid=46096, Unknown=0, NotChecked=0, Total=53592 [2022-03-01 18:05:29,402 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 2983 mSDsluCounter, 7347 mSDsCounter, 0 mSdLazyCounter, 7031 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2983 SdHoareTripleChecker+Valid, 5112 SdHoareTripleChecker+Invalid, 7574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 7031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:29,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2983 Valid, 5112 Invalid, 7574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 7031 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-01 18:05:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20654 states. [2022-03-01 18:05:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20654 to 7787. [2022-03-01 18:05:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7787 states, 7786 states have (on average 2.9491394811199587) internal successors, (22962), 7786 states have internal predecessors, (22962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7787 states to 7787 states and 22962 transitions. [2022-03-01 18:05:29,631 INFO L78 Accepts]: Start accepts. Automaton has 7787 states and 22962 transitions. Word has length 37 [2022-03-01 18:05:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:29,631 INFO L470 AbstractCegarLoop]: Abstraction has 7787 states and 22962 transitions. [2022-03-01 18:05:29,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:29,631 INFO L276 IsEmpty]: Start isEmpty. Operand 7787 states and 22962 transitions. [2022-03-01 18:05:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:05:29,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:29,684 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, 1, 1, 1, 1, 1] [2022-03-01 18:05:29,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:29,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:29,885 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:05:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:29,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1366935005, now seen corresponding path program 39 times [2022-03-01 18:05:29,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:29,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606898460] [2022-03-01 18:05:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:29,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:30,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:30,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606898460] [2022-03-01 18:05:30,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606898460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:30,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915481412] [2022-03-01 18:05:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:05:30,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:30,280 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:30,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:05:30,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:05:30,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:30,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:05:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:30,621 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:30,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:05:30,893 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:30,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:05:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:31,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:31,801 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:05:31,801 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 91 treesize of output 90 [2022-03-01 18:05:32,338 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:05:32,338 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 80 treesize of output 86 [2022-03-01 18:05:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:32,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915481412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:32,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:32,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-03-01 18:05:32,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510589516] [2022-03-01 18:05:32,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:32,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-01 18:05:32,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-01 18:05:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2697, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:05:32,512 INFO L87 Difference]: Start difference. First operand 7787 states and 22962 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:45,319 INFO L93 Difference]: Finished difference Result 20519 states and 59992 transitions. [2022-03-01 18:05:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-01 18:05:45,319 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:05:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:45,360 INFO L225 Difference]: With dead ends: 20519 [2022-03-01 18:05:45,360 INFO L226 Difference]: Without dead ends: 20332 [2022-03-01 18:05:45,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16740 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=6123, Invalid=40317, Unknown=0, NotChecked=0, Total=46440 [2022-03-01 18:05:45,362 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 2858 mSDsluCounter, 8383 mSDsCounter, 0 mSdLazyCounter, 7550 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2858 SdHoareTripleChecker+Valid, 5925 SdHoareTripleChecker+Invalid, 8069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 7550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:45,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2858 Valid, 5925 Invalid, 8069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 7550 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-01 18:05:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20332 states. [2022-03-01 18:05:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20332 to 7759. [2022-03-01 18:05:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7759 states, 7758 states have (on average 2.9498582108790927) internal successors, (22885), 7758 states have internal predecessors, (22885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 22885 transitions. [2022-03-01 18:05:45,592 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 22885 transitions. Word has length 37 [2022-03-01 18:05:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:45,592 INFO L470 AbstractCegarLoop]: Abstraction has 7759 states and 22885 transitions. [2022-03-01 18:05:45,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 22885 transitions. [2022-03-01 18:05:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:05:45,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:45,603 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, 1, 1, 1, 1, 1] [2022-03-01 18:05:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:45,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 18:05:45,804 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:05:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:45,804 INFO L85 PathProgramCache]: Analyzing trace with hash -411405653, now seen corresponding path program 40 times [2022-03-01 18:05:45,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:45,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106156369] [2022-03-01 18:05:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:45,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:46,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:46,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106156369] [2022-03-01 18:05:46,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106156369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:46,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886157391] [2022-03-01 18:05:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:05:46,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:46,157 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:46,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:05:46,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:05:46,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:05:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:46,628 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:46,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-01 18:05:46,700 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:46,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:05:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:46,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:47,382 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:05:47,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 88 [2022-03-01 18:05:47,756 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:05:47,756 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 70 treesize of output 75 [2022-03-01 18:05:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:47,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886157391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:47,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:47,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 47 [2022-03-01 18:05:47,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011867351] [2022-03-01 18:05:47,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:47,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-01 18:05:47,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-01 18:05:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2025, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:05:47,912 INFO L87 Difference]: Start difference. First operand 7759 states and 22885 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:56,014 INFO L93 Difference]: Finished difference Result 16527 states and 48669 transitions. [2022-03-01 18:05:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-01 18:05:56,014 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:05:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:56,047 INFO L225 Difference]: With dead ends: 16527 [2022-03-01 18:05:56,047 INFO L226 Difference]: Without dead ends: 16202 [2022-03-01 18:05:56,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5778 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2330, Invalid=18262, Unknown=0, NotChecked=0, Total=20592 [2022-03-01 18:05:56,048 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 1564 mSDsluCounter, 6750 mSDsCounter, 0 mSdLazyCounter, 6270 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 5270 SdHoareTripleChecker+Invalid, 6677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 6270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:56,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 5270 Invalid, 6677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 6270 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-01 18:05:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16202 states. [2022-03-01 18:05:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16202 to 8119. [2022-03-01 18:05:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8119 states, 8118 states have (on average 2.9599655087459964) internal successors, (24029), 8118 states have internal predecessors, (24029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8119 states to 8119 states and 24029 transitions. [2022-03-01 18:05:56,234 INFO L78 Accepts]: Start accepts. Automaton has 8119 states and 24029 transitions. Word has length 37 [2022-03-01 18:05:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:56,234 INFO L470 AbstractCegarLoop]: Abstraction has 8119 states and 24029 transitions. [2022-03-01 18:05:56,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8119 states and 24029 transitions. [2022-03-01 18:05:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:05:56,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:56,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:05:56,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:56,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:05:56,446 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:05:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1102743625, now seen corresponding path program 41 times [2022-03-01 18:05:56,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:56,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907259103] [2022-03-01 18:05:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:56,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:56,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:56,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907259103] [2022-03-01 18:05:56,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907259103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:56,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888824859] [2022-03-01 18:05:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:05:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:56,826 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:56,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:05:56,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:05:56,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:56,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 18:05:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:57,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:05:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:05:57,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:57,371 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 31 treesize of output 19 [2022-03-01 18:05:57,443 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:05:57,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 31 [2022-03-01 18:05:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:57,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:58,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:58,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:58,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:58,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:05:58,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 82 [2022-03-01 18:05:58,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:58,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:05:58,527 INFO L353 Elim1Store]: treesize reduction 5, result has 86.5 percent of original size [2022-03-01 18:05:58,528 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 68 treesize of output 75 [2022-03-01 18:05:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:05:58,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888824859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:58,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:58,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-03-01 18:05:58,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594093121] [2022-03-01 18:05:58,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:58,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-01 18:05:58,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-01 18:05:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:05:58,685 INFO L87 Difference]: Start difference. First operand 8119 states and 24029 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:03,771 INFO L93 Difference]: Finished difference Result 12766 states and 37052 transitions. [2022-03-01 18:06:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 18:06:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:03,793 INFO L225 Difference]: With dead ends: 12766 [2022-03-01 18:06:03,793 INFO L226 Difference]: Without dead ends: 12521 [2022-03-01 18:06:03,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1313, Invalid=9817, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:06:03,794 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 906 mSDsluCounter, 2460 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 2946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 1660 Invalid, 2946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 2103 Invalid, 0 Unknown, 610 Unchecked, 1.0s Time] [2022-03-01 18:06:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12521 states. [2022-03-01 18:06:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12521 to 8131. [2022-03-01 18:06:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8131 states, 8130 states have (on average 2.9580565805658057) internal successors, (24049), 8130 states have internal predecessors, (24049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8131 states to 8131 states and 24049 transitions. [2022-03-01 18:06:03,952 INFO L78 Accepts]: Start accepts. Automaton has 8131 states and 24049 transitions. Word has length 37 [2022-03-01 18:06:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:03,952 INFO L470 AbstractCegarLoop]: Abstraction has 8131 states and 24049 transitions. [2022-03-01 18:06:03,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8131 states and 24049 transitions. [2022-03-01 18:06:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:03,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:03,964 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, 1, 1, 1, 1, 1] [2022-03-01 18:06:03,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:04,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 18:06:04,165 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 673982597, now seen corresponding path program 42 times [2022-03-01 18:06:04,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:04,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639850806] [2022-03-01 18:06:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:04,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:04,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:04,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639850806] [2022-03-01 18:06:04,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639850806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:04,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976175217] [2022-03-01 18:06:04,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:06:04,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:04,538 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:04,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:06:04,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:06:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:06:04,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:04,972 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:04,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:06:05,093 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:05,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2022-03-01 18:06:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:05,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:05,754 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:05,754 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 82 treesize of output 88 [2022-03-01 18:06:06,145 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:06:06,145 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 70 treesize of output 75 [2022-03-01 18:06:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:06,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976175217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:06,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:06,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 48 [2022-03-01 18:06:06,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269330514] [2022-03-01 18:06:06,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:06:06,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:06:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2125, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:06:06,293 INFO L87 Difference]: Start difference. First operand 8131 states and 24049 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:15,637 INFO L93 Difference]: Finished difference Result 17942 states and 52741 transitions. [2022-03-01 18:06:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-01 18:06:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:15,667 INFO L225 Difference]: With dead ends: 17942 [2022-03-01 18:06:15,667 INFO L226 Difference]: Without dead ends: 17605 [2022-03-01 18:06:15,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8744 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2996, Invalid=25060, Unknown=0, NotChecked=0, Total=28056 [2022-03-01 18:06:15,668 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 1821 mSDsluCounter, 6036 mSDsCounter, 0 mSdLazyCounter, 6130 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1821 SdHoareTripleChecker+Valid, 4525 SdHoareTripleChecker+Invalid, 6603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 6130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:15,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1821 Valid, 4525 Invalid, 6603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 6130 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-01 18:06:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17605 states. [2022-03-01 18:06:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17605 to 8172. [2022-03-01 18:06:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.9597356504711785) internal successors, (24184), 8171 states have internal predecessors, (24184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 24184 transitions. [2022-03-01 18:06:15,865 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 24184 transitions. Word has length 37 [2022-03-01 18:06:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:15,865 INFO L470 AbstractCegarLoop]: Abstraction has 8172 states and 24184 transitions. [2022-03-01 18:06:15,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 24184 transitions. [2022-03-01 18:06:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:15,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:15,875 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, 1, 1, 1, 1, 1] [2022-03-01 18:06:15,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:16,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:16,076 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2027399361, now seen corresponding path program 43 times [2022-03-01 18:06:16,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:16,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3987476] [2022-03-01 18:06:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:16,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:16,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3987476] [2022-03-01 18:06:16,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3987476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:16,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140912046] [2022-03-01 18:06:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:06:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:16,453 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:16,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:06:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:06:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:16,843 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:16,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:06:17,085 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:17,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:06:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:17,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:17,972 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:06:17,972 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 93 treesize of output 92 [2022-03-01 18:06:18,511 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:18,512 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 80 treesize of output 86 [2022-03-01 18:06:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:18,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140912046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:18,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:18,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:06:18,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647154806] [2022-03-01 18:06:18,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:18,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:06:18,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:06:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:06:18,768 INFO L87 Difference]: Start difference. First operand 8172 states and 24184 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:28,175 INFO L93 Difference]: Finished difference Result 14522 states and 41992 transitions. [2022-03-01 18:06:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-01 18:06:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:28,203 INFO L225 Difference]: With dead ends: 14522 [2022-03-01 18:06:28,204 INFO L226 Difference]: Without dead ends: 14351 [2022-03-01 18:06:28,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5831 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2469, Invalid=19583, Unknown=0, NotChecked=0, Total=22052 [2022-03-01 18:06:28,205 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 1372 mSDsluCounter, 7912 mSDsCounter, 0 mSdLazyCounter, 7752 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 5546 SdHoareTripleChecker+Invalid, 8067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 7752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:28,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 5546 Invalid, 8067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 7752 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-01 18:06:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14351 states. [2022-03-01 18:06:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14351 to 8181. [2022-03-01 18:06:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8180 states have (on average 2.958679706601467) internal successors, (24202), 8180 states have internal predecessors, (24202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 24202 transitions. [2022-03-01 18:06:28,367 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 24202 transitions. Word has length 37 [2022-03-01 18:06:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:28,367 INFO L470 AbstractCegarLoop]: Abstraction has 8181 states and 24202 transitions. [2022-03-01 18:06:28,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 24202 transitions. [2022-03-01 18:06:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:28,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:28,377 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, 1, 1, 1, 1, 1] [2022-03-01 18:06:28,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:28,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 18:06:28,578 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash -153313795, now seen corresponding path program 44 times [2022-03-01 18:06:28,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:28,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891187977] [2022-03-01 18:06:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:28,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:28,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:28,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891187977] [2022-03-01 18:06:28,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891187977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:28,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310231821] [2022-03-01 18:06:28,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:06:28,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:28,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:28,922 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:28,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:06:28,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:06:28,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:28,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:06:28,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:29,349 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:29,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:06:29,619 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:29,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-01 18:06:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:29,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:30,463 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:06:30,463 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 93 treesize of output 92 [2022-03-01 18:06:31,064 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:31,065 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 80 treesize of output 86 [2022-03-01 18:06:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:31,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310231821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:31,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:31,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:06:31,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626873039] [2022-03-01 18:06:31,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:31,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:06:31,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:06:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:06:31,232 INFO L87 Difference]: Start difference. First operand 8181 states and 24202 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:41,854 INFO L93 Difference]: Finished difference Result 15938 states and 46371 transitions. [2022-03-01 18:06:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-01 18:06:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:41,886 INFO L225 Difference]: With dead ends: 15938 [2022-03-01 18:06:41,886 INFO L226 Difference]: Without dead ends: 15802 [2022-03-01 18:06:41,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7415 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3001, Invalid=23405, Unknown=0, NotChecked=0, Total=26406 [2022-03-01 18:06:41,887 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 1248 mSDsluCounter, 7497 mSDsCounter, 0 mSdLazyCounter, 7128 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 5308 SdHoareTripleChecker+Invalid, 7450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 7128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:41,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1248 Valid, 5308 Invalid, 7450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 7128 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:06:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15802 states. [2022-03-01 18:06:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15802 to 8178. [2022-03-01 18:06:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8178 states, 8177 states have (on average 2.958786841139782) internal successors, (24194), 8177 states have internal predecessors, (24194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8178 states to 8178 states and 24194 transitions. [2022-03-01 18:06:42,061 INFO L78 Accepts]: Start accepts. Automaton has 8178 states and 24194 transitions. Word has length 37 [2022-03-01 18:06:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:42,061 INFO L470 AbstractCegarLoop]: Abstraction has 8178 states and 24194 transitions. [2022-03-01 18:06:42,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:42,061 INFO L276 IsEmpty]: Start isEmpty. Operand 8178 states and 24194 transitions. [2022-03-01 18:06:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:42,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:42,071 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, 1, 1, 1, 1, 1] [2022-03-01 18:06:42,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:42,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:42,276 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1360184945, now seen corresponding path program 45 times [2022-03-01 18:06:42,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:42,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720552299] [2022-03-01 18:06:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:42,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:42,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720552299] [2022-03-01 18:06:42,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720552299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:42,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252077828] [2022-03-01 18:06:42,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:06:42,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:42,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:42,649 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:42,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:06:42,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:06:42,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:42,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:06:42,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:43,079 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:43,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2022-03-01 18:06:43,359 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:43,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 18:06:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:43,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:44,179 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:06:44,179 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 88 treesize of output 87 [2022-03-01 18:06:44,826 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:44,826 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 75 treesize of output 83 [2022-03-01 18:06:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:45,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252077828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:45,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:45,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:06:45,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744717499] [2022-03-01 18:06:45,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:45,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:06:45,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:06:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:06:45,005 INFO L87 Difference]: Start difference. First operand 8178 states and 24194 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:06:55,037 INFO L93 Difference]: Finished difference Result 16421 states and 47803 transitions. [2022-03-01 18:06:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-01 18:06:55,038 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:06:55,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:06:55,067 INFO L225 Difference]: With dead ends: 16421 [2022-03-01 18:06:55,068 INFO L226 Difference]: Without dead ends: 16254 [2022-03-01 18:06:55,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7405 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3052, Invalid=23680, Unknown=0, NotChecked=0, Total=26732 [2022-03-01 18:06:55,069 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 1340 mSDsluCounter, 8091 mSDsCounter, 0 mSdLazyCounter, 7167 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 5736 SdHoareTripleChecker+Invalid, 7497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 7167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:06:55,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 5736 Invalid, 7497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 7167 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-01 18:06:55,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16254 states. [2022-03-01 18:06:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16254 to 8157. [2022-03-01 18:06:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 2.96174595389897) internal successors, (24156), 8156 states have internal predecessors, (24156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 24156 transitions. [2022-03-01 18:06:55,274 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 24156 transitions. Word has length 37 [2022-03-01 18:06:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:06:55,274 INFO L470 AbstractCegarLoop]: Abstraction has 8157 states and 24156 transitions. [2022-03-01 18:06:55,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:06:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 24156 transitions. [2022-03-01 18:06:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:06:55,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:06:55,285 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, 1, 1, 1, 1, 1] [2022-03-01 18:06:55,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 18:06:55,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-01 18:06:55,485 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:06:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:06:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1510437841, now seen corresponding path program 46 times [2022-03-01 18:06:55,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:06:55,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216129718] [2022-03-01 18:06:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:06:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:06:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:06:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:55,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:06:55,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216129718] [2022-03-01 18:06:55,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216129718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:06:55,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647134065] [2022-03-01 18:06:55,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:06:55,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:06:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:06:55,839 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:06:55,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:06:55,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:06:55,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:06:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:06:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:06:56,382 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:56,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-01 18:06:56,462 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:06:56,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:06:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:56,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:06:57,355 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:06:57,355 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 93 treesize of output 92 [2022-03-01 18:06:58,003 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:06:58,004 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 85 treesize of output 91 [2022-03-01 18:06:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:06:58,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647134065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:06:58,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:06:58,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2022-03-01 18:06:58,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077143710] [2022-03-01 18:06:58,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:06:58,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-01 18:06:58,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:06:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-01 18:06:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:06:58,189 INFO L87 Difference]: Start difference. First operand 8157 states and 24156 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:08,148 INFO L93 Difference]: Finished difference Result 15761 states and 45784 transitions. [2022-03-01 18:07:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-01 18:07:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:07:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:08,175 INFO L225 Difference]: With dead ends: 15761 [2022-03-01 18:07:08,176 INFO L226 Difference]: Without dead ends: 15516 [2022-03-01 18:07:08,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6064 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2378, Invalid=21492, Unknown=0, NotChecked=0, Total=23870 [2022-03-01 18:07:08,177 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1683 mSDsluCounter, 5893 mSDsCounter, 0 mSdLazyCounter, 6077 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 4306 SdHoareTripleChecker+Invalid, 6452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 6077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:08,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 4306 Invalid, 6452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 6077 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-01 18:07:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15516 states. [2022-03-01 18:07:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15516 to 8130. [2022-03-01 18:07:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8130 states, 8129 states have (on average 2.962726042563661) internal successors, (24084), 8129 states have internal predecessors, (24084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8130 states to 8130 states and 24084 transitions. [2022-03-01 18:07:08,352 INFO L78 Accepts]: Start accepts. Automaton has 8130 states and 24084 transitions. Word has length 37 [2022-03-01 18:07:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 8130 states and 24084 transitions. [2022-03-01 18:07:08,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 8130 states and 24084 transitions. [2022-03-01 18:07:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:08,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:08,363 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, 1, 1, 1, 1, 1] [2022-03-01 18:07:08,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:08,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-01 18:07:08,564 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1081676813, now seen corresponding path program 47 times [2022-03-01 18:07:08,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:08,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152525803] [2022-03-01 18:07:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:08,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:08,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:08,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152525803] [2022-03-01 18:07:08,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152525803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:08,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093365557] [2022-03-01 18:07:08,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:07:08,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:08,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:08,909 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:08,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:07:08,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:07:08,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:08,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:07:08,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:09,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:07:09,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:09,394 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 31 treesize of output 19 [2022-03-01 18:07:09,622 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:09,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2022-03-01 18:07:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:09,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:10,533 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:07:10,534 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 88 treesize of output 87 [2022-03-01 18:07:11,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:11,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:07:11,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:07:11,115 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 73 treesize of output 83 [2022-03-01 18:07:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:11,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093365557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:11,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:11,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:07:11,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423074000] [2022-03-01 18:07:11,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:11,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:07:11,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:07:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:07:11,442 INFO L87 Difference]: Start difference. First operand 8130 states and 24084 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:17,983 INFO L93 Difference]: Finished difference Result 12250 states and 35435 transitions. [2022-03-01 18:07:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 18:07:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:07:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:18,003 INFO L225 Difference]: With dead ends: 12250 [2022-03-01 18:07:18,004 INFO L226 Difference]: Without dead ends: 12065 [2022-03-01 18:07:18,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3158 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1750, Invalid=13012, Unknown=0, NotChecked=0, Total=14762 [2022-03-01 18:07:18,005 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 982 mSDsluCounter, 2632 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 3394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:18,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 1670 Invalid, 3394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2693 Invalid, 0 Unknown, 433 Unchecked, 1.3s Time] [2022-03-01 18:07:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12065 states. [2022-03-01 18:07:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12065 to 8138. [2022-03-01 18:07:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8138 states, 8137 states have (on average 2.9604276760476833) internal successors, (24089), 8137 states have internal predecessors, (24089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8138 states to 8138 states and 24089 transitions. [2022-03-01 18:07:18,169 INFO L78 Accepts]: Start accepts. Automaton has 8138 states and 24089 transitions. Word has length 37 [2022-03-01 18:07:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:18,169 INFO L470 AbstractCegarLoop]: Abstraction has 8138 states and 24089 transitions. [2022-03-01 18:07:18,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8138 states and 24089 transitions. [2022-03-01 18:07:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:18,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:18,180 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, 1, 1, 1, 1, 1] [2022-03-01 18:07:18,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:18,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:18,381 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1859873719, now seen corresponding path program 48 times [2022-03-01 18:07:18,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:18,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212141740] [2022-03-01 18:07:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:18,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:18,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212141740] [2022-03-01 18:07:18,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212141740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:18,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109318358] [2022-03-01 18:07:18,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:07:18,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:18,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:18,771 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:18,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:07:18,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:07:18,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 18:07:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:19,167 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:19,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-01 18:07:19,296 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-01 18:07:19,296 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 46 treesize of output 26 [2022-03-01 18:07:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:19,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:19,984 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:19,984 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 82 treesize of output 88 [2022-03-01 18:07:20,431 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:07:20,431 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 70 treesize of output 75 [2022-03-01 18:07:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:20,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109318358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:20,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:20,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 48 [2022-03-01 18:07:20,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849825198] [2022-03-01 18:07:20,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:20,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-01 18:07:20,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:20,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-01 18:07:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:07:20,598 INFO L87 Difference]: Start difference. First operand 8138 states and 24089 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:32,379 INFO L93 Difference]: Finished difference Result 18304 states and 53815 transitions. [2022-03-01 18:07:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-01 18:07:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:07:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:32,419 INFO L225 Difference]: With dead ends: 18304 [2022-03-01 18:07:32,419 INFO L226 Difference]: Without dead ends: 18045 [2022-03-01 18:07:32,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10283 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3195, Invalid=29747, Unknown=0, NotChecked=0, Total=32942 [2022-03-01 18:07:32,421 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 1591 mSDsluCounter, 10116 mSDsCounter, 0 mSdLazyCounter, 10175 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 7089 SdHoareTripleChecker+Invalid, 10548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 10175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:32,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 7089 Invalid, 10548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 10175 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-01 18:07:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18045 states. [2022-03-01 18:07:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18045 to 8319. [2022-03-01 18:07:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 2.9686222649675402) internal successors, (24693), 8318 states have internal predecessors, (24693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 24693 transitions. [2022-03-01 18:07:32,620 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 24693 transitions. Word has length 37 [2022-03-01 18:07:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 8319 states and 24693 transitions. [2022-03-01 18:07:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 24693 transitions. [2022-03-01 18:07:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:32,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:32,632 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, 1, 1, 1, 1, 1] [2022-03-01 18:07:32,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:32,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-01 18:07:32,833 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1472913493, now seen corresponding path program 49 times [2022-03-01 18:07:32,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:32,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929242571] [2022-03-01 18:07:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:32,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:33,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:33,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929242571] [2022-03-01 18:07:33,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929242571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:33,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80684239] [2022-03-01 18:07:33,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:07:33,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:33,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:33,239 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:33,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:07:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:33,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:07:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:33,585 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:33,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:07:33,872 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:33,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:07:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:34,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:34,800 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:07:34,800 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 93 treesize of output 92 [2022-03-01 18:07:35,364 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:35,364 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 80 treesize of output 86 [2022-03-01 18:07:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:35,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80684239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:35,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:35,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:07:35,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64061805] [2022-03-01 18:07:35,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:35,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:07:35,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:07:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:07:35,550 INFO L87 Difference]: Start difference. First operand 8319 states and 24693 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:07:48,279 INFO L93 Difference]: Finished difference Result 17122 states and 50211 transitions. [2022-03-01 18:07:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-01 18:07:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:07:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:07:48,311 INFO L225 Difference]: With dead ends: 17122 [2022-03-01 18:07:48,311 INFO L226 Difference]: Without dead ends: 16993 [2022-03-01 18:07:48,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9790 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=4088, Invalid=29218, Unknown=0, NotChecked=0, Total=33306 [2022-03-01 18:07:48,313 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1591 mSDsluCounter, 7716 mSDsCounter, 0 mSdLazyCounter, 7764 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 5071 SdHoareTripleChecker+Invalid, 8146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 7764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:07:48,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 5071 Invalid, 8146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 7764 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-01 18:07:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16993 states. [2022-03-01 18:07:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16993 to 8317. [2022-03-01 18:07:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 8316 states have (on average 2.9684944684944683) internal successors, (24686), 8316 states have internal predecessors, (24686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24686 transitions. [2022-03-01 18:07:48,541 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24686 transitions. Word has length 37 [2022-03-01 18:07:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:07:48,541 INFO L470 AbstractCegarLoop]: Abstraction has 8317 states and 24686 transitions. [2022-03-01 18:07:48,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:07:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24686 transitions. [2022-03-01 18:07:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:07:48,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:07:48,551 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, 1, 1, 1, 1, 1] [2022-03-01 18:07:48,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 18:07:48,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 18:07:48,752 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:07:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:07:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1077689797, now seen corresponding path program 50 times [2022-03-01 18:07:48,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:07:48,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042543664] [2022-03-01 18:07:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:07:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:07:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:07:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:49,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:07:49,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042543664] [2022-03-01 18:07:49,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042543664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:07:49,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489438320] [2022-03-01 18:07:49,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:07:49,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:07:49,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:07:49,134 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:07:49,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:07:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:07:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:07:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:07:49,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:07:49,559 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:49,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:07:49,831 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:07:49,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-03-01 18:07:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:50,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:07:50,791 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:07:50,792 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 93 treesize of output 92 [2022-03-01 18:07:51,373 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:07:51,373 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 85 treesize of output 91 [2022-03-01 18:07:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:07:51,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489438320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:07:51,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:07:51,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:07:51,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977309337] [2022-03-01 18:07:51,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:07:51,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:07:51,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:07:51,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:07:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2494, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:07:51,563 INFO L87 Difference]: Start difference. First operand 8317 states and 24686 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:08:05,116 INFO L93 Difference]: Finished difference Result 17427 states and 51224 transitions. [2022-03-01 18:08:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-03-01 18:08:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-01 18:08:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:08:05,147 INFO L225 Difference]: With dead ends: 17427 [2022-03-01 18:08:05,147 INFO L226 Difference]: Without dead ends: 17301 [2022-03-01 18:08:05,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=4229, Invalid=33213, Unknown=0, NotChecked=0, Total=37442 [2022-03-01 18:08:05,149 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 1687 mSDsluCounter, 7975 mSDsCounter, 0 mSdLazyCounter, 7500 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 5296 SdHoareTripleChecker+Invalid, 7900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 7500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:05,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1687 Valid, 5296 Invalid, 7900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 7500 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-01 18:08:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17301 states. [2022-03-01 18:08:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17301 to 8320. [2022-03-01 18:08:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8320 states, 8319 states have (on average 2.968025003005169) internal successors, (24691), 8319 states have internal predecessors, (24691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8320 states to 8320 states and 24691 transitions. [2022-03-01 18:08:05,324 INFO L78 Accepts]: Start accepts. Automaton has 8320 states and 24691 transitions. Word has length 37 [2022-03-01 18:08:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:08:05,324 INFO L470 AbstractCegarLoop]: Abstraction has 8320 states and 24691 transitions. [2022-03-01 18:08:05,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:08:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8320 states and 24691 transitions. [2022-03-01 18:08:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-01 18:08:05,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:08:05,335 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, 1, 1, 1, 1, 1] [2022-03-01 18:08:05,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 18:08:05,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:05,535 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:08:05,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:08:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1103023359, now seen corresponding path program 51 times [2022-03-01 18:08:05,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:08:05,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683924332] [2022-03-01 18:08:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:08:05,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:08:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:08:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:05,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:08:05,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683924332] [2022-03-01 18:08:05,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683924332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:08:05,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337953828] [2022-03-01 18:08:05,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:08:05,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:08:05,881 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:08:05,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:08:05,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:08:05,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:08:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:08:05,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:08:06,253 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:08:06,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-01 18:08:06,592 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-01 18:08:06,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2022-03-01 18:08:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:08:07,465 INFO L353 Elim1Store]: treesize reduction 29, result has 52.5 percent of original size [2022-03-01 18:08:07,466 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 88 treesize of output 87 [2022-03-01 18:08:07,977 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:08:07,978 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 75 treesize of output 83 [2022-03-01 18:08:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:08:08,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337953828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:08:08,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:08:08,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-01 18:08:08,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837572951] [2022-03-01 18:08:08,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:08:08,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-01 18:08:08,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:08:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-01 18:08:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:08:08,147 INFO L87 Difference]: Start difference. First operand 8320 states and 24691 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-01 18:08:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:08:09,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=467, Invalid=3823, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:08:09,230 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 246 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:08:09,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 232 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:08:09,231 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:08:09,245 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:08:09,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 18:08:09,248 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:08:09,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:08:09,440 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (8320states) and FLOYD_HOARE automaton (currently 15 states, 53 states before enhancement),while ReachableStatesComputation was computing reachable states (115 states constructed, input type IntersectNwa). [2022-03-01 18:08:09,442 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:08:09,442 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:08:09,442 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:08:09,444 INFO L732 BasicCegarLoop]: Path program histogram: [51, 5, 1, 1] [2022-03-01 18:08:09,446 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:08:09,446 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:08:09,447 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:08:09 BasicIcfg [2022-03-01 18:08:09,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:08:09,447 INFO L158 Benchmark]: Toolchain (without parser) took 749586.70ms. Allocated memory was 191.9MB in the beginning and 1.0GB in the end (delta: 818.9MB). Free memory was 155.7MB in the beginning and 612.4MB in the end (delta: -456.7MB). Peak memory consumption was 364.0MB. Max. memory is 8.0GB. [2022-03-01 18:08:09,447 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 191.9MB. Free memory was 157.0MB in the beginning and 156.8MB in the end (delta: 147.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:08:09,447 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.98ms. Allocated memory is still 191.9MB. Free memory was 155.6MB in the beginning and 154.1MB in the end (delta: 1.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-01 18:08:09,447 INFO L158 Benchmark]: Boogie Preprocessor took 16.39ms. Allocated memory is still 191.9MB. Free memory was 154.1MB in the beginning and 153.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:08:09,448 INFO L158 Benchmark]: RCFGBuilder took 220.04ms. Allocated memory is still 191.9MB. Free memory was 153.1MB in the beginning and 143.0MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:08:09,448 INFO L158 Benchmark]: TraceAbstraction took 749322.77ms. Allocated memory was 191.9MB in the beginning and 1.0GB in the end (delta: 818.9MB). Free memory was 142.4MB in the beginning and 612.4MB in the end (delta: -470.0MB). Peak memory consumption was 349.3MB. Max. memory is 8.0GB. [2022-03-01 18:08:09,448 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 191.9MB. Free memory was 157.0MB in the beginning and 156.8MB in the end (delta: 147.1kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.98ms. Allocated memory is still 191.9MB. Free memory was 155.6MB in the beginning and 154.1MB in the end (delta: 1.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.39ms. Allocated memory is still 191.9MB. Free memory was 154.1MB in the beginning and 153.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 220.04ms. Allocated memory is still 191.9MB. Free memory was 153.1MB in the beginning and 143.0MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 749322.77ms. Allocated memory was 191.9MB in the beginning and 1.0GB in the end (delta: 818.9MB). Free memory was 142.4MB in the beginning and 612.4MB in the end (delta: -470.0MB). Peak memory consumption was 349.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (8320states) and FLOYD_HOARE automaton (currently 15 states, 53 states before enhancement),while ReachableStatesComputation was computing reachable states (115 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8320states) and FLOYD_HOARE automaton (currently 15 states, 53 states before enhancement),while ReachableStatesComputation was computing reachable states (115 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8320states) and FLOYD_HOARE automaton (currently 15 states, 53 states before enhancement),while ReachableStatesComputation was computing reachable states (115 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8320states) and FLOYD_HOARE automaton (currently 15 states, 53 states before enhancement),while ReachableStatesComputation was computing reachable states (115 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 749.2s, OverallIterations: 58, TraceHistogramMax: 2, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.5s, AutomataDifference: 596.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89834 SdHoareTripleChecker+Valid, 155.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 89834 mSDsluCounter, 243074 SdHoareTripleChecker+Invalid, 133.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2382 IncrementalHoareTripleChecker+Unchecked, 345105 mSDsCounter, 18108 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 358715 IncrementalHoareTripleChecker+Invalid, 379205 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18108 mSolverCounterUnsat, 8922 mSDtfsCounter, 358715 mSolverCounterSat, 1.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11391 GetRequests, 2196 SyntacticMatches, 80 SemanticMatches, 9115 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 557562 ImplicationChecksByTransitivity, 488.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8320occurred in iteration=57, InterpolantAutomatonStates: 7446, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.9s AutomataMinimizationTime, 57 MinimizatonAttempts, 317303 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 130.8s InterpolantComputationTime, 4028 NumberOfCodeBlocks, 4028 NumberOfCodeBlocksAsserted, 182 NumberOfCheckSat, 5786 ConstructedInterpolants, 36 QuantifiedInterpolants, 166293 SizeOfPredicates, 672 NumberOfNonLiveVariables, 5485 ConjunctsInSsa, 2153 ConjunctsInUnsatCore, 166 InterpolantComputations, 5 PerfectInterpolantSequences, 47/2139 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