/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-more/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:13:49,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:13:49,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:13:49,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:13:49,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 13:13:49,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 13:13:49,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 13:13:49,804 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 [2021-08-21 13:13:49,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:13:49,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:13:49,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:13:49,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:13:49,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:13:49,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:13:49,828 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:13:49,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:13:49,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:13:49,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:13:49,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:13:49,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:13:49,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:13:49,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:13:49,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:13:49,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:13:49,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:13:49,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:13:49,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:13:49,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:13:49,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:13:49,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:13:49,832 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:13:49,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:13:49,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:13:50,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:13:50,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:13:50,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:13:50,125 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:13:50,126 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:13:50,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2021-08-21 13:13:50,127 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2021-08-21 13:13:50,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:13:50,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:13:50,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:13:50,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:13:50,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:13:50,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:13:50,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:13:50,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:13:50,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:13:50,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:13:50,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:13:50,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:13:50,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:13:50,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/1) ... [2021-08-21 13:13:50,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:13:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:50,387 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) [2021-08-21 13:13:50,406 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 [2021-08-21 13:13:50,417 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:13:50,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:13:50,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:13:50,417 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:13:50,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:13:50,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:13:50,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:13:50,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:13:50,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:13:50,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 13:13:50,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 13:13:50,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 13:13:50,419 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 13:13:50,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:13:50,559 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:13:50,561 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:13:50 BoogieIcfgContainer [2021-08-21 13:13:50,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:13:50,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:13:50,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:13:50,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:13:50,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:13:50" (1/2) ... [2021-08-21 13:13:50,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76de09e8 and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:13:50, skipping insertion in model container [2021-08-21 13:13:50,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:13:50" (2/2) ... [2021-08-21 13:13:50,566 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2021-08-21 13:13:50,570 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:13:50,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:13:50,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:13:50,571 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:13:50,596 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 13:13:50,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:13:50,628 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 13:13:50,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 13:13:50,634 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-21 13:13:50,661 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 13:13:50,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:50,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:50,670 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:50,674 INFO L82 PathProgramCache]: Analyzing trace with hash -427804195, now seen corresponding path program 1 times [2021-08-21 13:13:50,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:50,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216188276] [2021-08-21 13:13:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:50,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:50,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:50,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216188276] [2021-08-21 13:13:50,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216188276] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:13:50,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:13:50,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:13:50,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026548853] [2021-08-21 13:13:50,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:13:50,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:13:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:13:50,839 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:50,889 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-08-21 13:13:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:13:50,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 13:13:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:50,897 INFO L225 Difference]: With dead ends: 154 [2021-08-21 13:13:50,897 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 13:13:50,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:13:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 13:13:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-08-21 13:13:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-21 13:13:50,929 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-08-21 13:13:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:50,929 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-21 13:13:50,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-21 13:13:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:13:50,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:50,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:50,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:13:50,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash -436737251, now seen corresponding path program 1 times [2021-08-21 13:13:50,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:50,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137274342] [2021-08-21 13:13:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:50,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:13:50,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:50,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137274342] [2021-08-21 13:13:50,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137274342] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:13:50,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:13:50,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:13:50,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013697731] [2021-08-21 13:13:50,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:13:50,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:13:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:13:50,972 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:51,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:51,000 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-08-21 13:13:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:13:51,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:13:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:51,002 INFO L225 Difference]: With dead ends: 158 [2021-08-21 13:13:51,002 INFO L226 Difference]: Without dead ends: 158 [2021-08-21 13:13:51,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:13:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-21 13:13:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-08-21 13:13:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-21 13:13:51,020 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-21 13:13:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:51,021 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-21 13:13:51,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-21 13:13:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:13:51,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:51,022 INFO L512 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] [2021-08-21 13:13:51,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:13:51,022 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash 277137723, now seen corresponding path program 1 times [2021-08-21 13:13:51,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:51,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504063218] [2021-08-21 13:13:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:51,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:51,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:51,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504063218] [2021-08-21 13:13:51,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504063218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:51,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963560489] [2021-08-21 13:13:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:51,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:51,414 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) [2021-08-21 13:13:51,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 13:13:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:13:51,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:52,148 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 13:13:52,149 INFO L388 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 62 treesize of output 51 [2021-08-21 13:13:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:52,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963560489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:52,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:52,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:13:52,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613055849] [2021-08-21 13:13:52,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:13:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:13:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:13:52,313 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:52,574 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-08-21 13:13:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:13:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:13:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:52,576 INFO L225 Difference]: With dead ends: 330 [2021-08-21 13:13:52,576 INFO L226 Difference]: Without dead ends: 315 [2021-08-21 13:13:52,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:13:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-21 13:13:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-21 13:13:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-21 13:13:52,588 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-21 13:13:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:52,588 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-21 13:13:52,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-21 13:13:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:13:52,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:52,589 INFO L512 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] [2021-08-21 13:13:52,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:52,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:52,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:52,812 INFO L82 PathProgramCache]: Analyzing trace with hash 109328631, now seen corresponding path program 2 times [2021-08-21 13:13:52,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:52,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723114523] [2021-08-21 13:13:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:52,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:53,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:53,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723114523] [2021-08-21 13:13:53,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723114523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:53,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733356930] [2021-08-21 13:13:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:13:53,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:53,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:53,249 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) [2021-08-21 13:13:53,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 13:13:53,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:13:53,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:53,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:13:53,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:53,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:53,803 INFO L388 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 54 treesize of output 48 [2021-08-21 13:13:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:54,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733356930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:54,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:54,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 13:13:54,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013013019] [2021-08-21 13:13:54,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:13:54,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:13:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:13:54,068 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:54,533 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-08-21 13:13:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:13:54,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:13:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:54,536 INFO L225 Difference]: With dead ends: 374 [2021-08-21 13:13:54,536 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 13:13:54,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:13:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 13:13:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-21 13:13:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-21 13:13:54,544 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-21 13:13:54,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:54,545 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-21 13:13:54,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-21 13:13:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:13:54,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:54,546 INFO L512 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] [2021-08-21 13:13:54,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:54,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 13:13:54,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash 408102079, now seen corresponding path program 3 times [2021-08-21 13:13:54,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:54,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146343923] [2021-08-21 13:13:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:54,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:54,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:54,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146343923] [2021-08-21 13:13:54,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146343923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:54,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707035198] [2021-08-21 13:13:54,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:13:54,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:54,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:54,970 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) [2021-08-21 13:13:54,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 13:13:55,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:13:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:13:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:55,385 INFO L388 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 56 treesize of output 42 [2021-08-21 13:13:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:55,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707035198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:55,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:55,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 13:13:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31228191] [2021-08-21 13:13:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:13:55,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:13:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:13:55,614 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:55,733 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-08-21 13:13:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:13:55,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:13:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:55,735 INFO L225 Difference]: With dead ends: 296 [2021-08-21 13:13:55,735 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 13:13:55,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:13:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 13:13:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-08-21 13:13:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-21 13:13:55,743 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-21 13:13:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:55,743 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-21 13:13:55,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-21 13:13:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:13:55,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:55,744 INFO L512 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] [2021-08-21 13:13:55,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-21 13:13:55,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:55,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1978927679, now seen corresponding path program 4 times [2021-08-21 13:13:55,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:55,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030932567] [2021-08-21 13:13:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:55,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:56,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:56,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030932567] [2021-08-21 13:13:56,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030932567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:56,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345787861] [2021-08-21 13:13:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:13:56,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:56,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:56,149 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) [2021-08-21 13:13:56,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 13:13:56,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:13:56,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:13:56,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:56,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:56,673 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 54 [2021-08-21 13:13:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:57,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345787861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:57,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:57,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:13:57,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962174122] [2021-08-21 13:13:57,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:13:57,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:13:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:13:57,078 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:57,338 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-08-21 13:13:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:13:57,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:13:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:57,340 INFO L225 Difference]: With dead ends: 425 [2021-08-21 13:13:57,340 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 13:13:57,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:13:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 13:13:57,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-21 13:13:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-21 13:13:57,346 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-21 13:13:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:57,346 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-21 13:13:57,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-21 13:13:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:13:57,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:57,347 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:57,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:57,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:57,561 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash -973582823, now seen corresponding path program 5 times [2021-08-21 13:13:57,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:57,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636180213] [2021-08-21 13:13:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:57,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:57,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:57,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636180213] [2021-08-21 13:13:57,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636180213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:57,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188643773] [2021-08-21 13:13:57,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:13:57,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:57,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:57,629 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) [2021-08-21 13:13:57,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 13:13:57,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:13:57,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:13:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:58,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188643773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:58,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:58,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:13:58,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651589986] [2021-08-21 13:13:58,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:13:58,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:58,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:13:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:13:58,031 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:58,332 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-08-21 13:13:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:13:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:13:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:58,335 INFO L225 Difference]: With dead ends: 619 [2021-08-21 13:13:58,335 INFO L226 Difference]: Without dead ends: 619 [2021-08-21 13:13:58,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:13:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-21 13:13:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-21 13:13:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-21 13:13:58,343 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-21 13:13:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:58,343 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-21 13:13:58,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-21 13:13:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:13:58,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:58,344 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:58,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:58,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:58,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1949901667, now seen corresponding path program 6 times [2021-08-21 13:13:58,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:58,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875978925] [2021-08-21 13:13:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:58,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:58,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:58,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875978925] [2021-08-21 13:13:58,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875978925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:58,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23861483] [2021-08-21 13:13:58,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:13:58,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:58,649 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) [2021-08-21 13:13:58,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 13:13:58,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:13:58,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:13:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:59,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23861483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:59,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:59,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:13:59,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513786815] [2021-08-21 13:13:59,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:13:59,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:13:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:13:59,112 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:59,863 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-08-21 13:13:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:13:59,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:13:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:59,868 INFO L225 Difference]: With dead ends: 1078 [2021-08-21 13:13:59,868 INFO L226 Difference]: Without dead ends: 1078 [2021-08-21 13:13:59,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:13:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-21 13:13:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-21 13:13:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-21 13:13:59,879 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-21 13:13:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:59,879 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-21 13:13:59,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-21 13:13:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:13:59,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:59,880 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:59,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 13:14:00,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:00,098 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:00,098 INFO L82 PathProgramCache]: Analyzing trace with hash -420997023, now seen corresponding path program 7 times [2021-08-21 13:14:00,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:00,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437665599] [2021-08-21 13:14:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:00,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:00,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:00,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437665599] [2021-08-21 13:14:00,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437665599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:00,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181599430] [2021-08-21 13:14:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:00,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:00,201 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) [2021-08-21 13:14:00,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 13:14:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:00,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:00,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:00,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181599430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:00,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:00,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:00,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664544225] [2021-08-21 13:14:00,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:00,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:00,731 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:01,391 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-08-21 13:14:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:14:01,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:01,395 INFO L225 Difference]: With dead ends: 951 [2021-08-21 13:14:01,395 INFO L226 Difference]: Without dead ends: 951 [2021-08-21 13:14:01,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:14:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-21 13:14:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-21 13:14:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-21 13:14:01,404 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-21 13:14:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:01,404 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-21 13:14:01,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-21 13:14:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:01,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:01,405 INFO L512 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] [2021-08-21 13:14:01,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:01,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:01,623 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:01,623 INFO L82 PathProgramCache]: Analyzing trace with hash -446810915, now seen corresponding path program 1 times [2021-08-21 13:14:01,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:01,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169209774] [2021-08-21 13:14:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:01,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:01,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:01,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169209774] [2021-08-21 13:14:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169209774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:01,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404463530] [2021-08-21 13:14:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:01,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:01,654 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) [2021-08-21 13:14:01,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 13:14:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:02,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:14:02,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:02,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404463530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:02,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:02,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:14:02,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279800266] [2021-08-21 13:14:02,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:14:02,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:14:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:14:02,088 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:02,178 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-08-21 13:14:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:14:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:02,181 INFO L225 Difference]: With dead ends: 669 [2021-08-21 13:14:02,181 INFO L226 Difference]: Without dead ends: 663 [2021-08-21 13:14:02,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-21 13:14:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-21 13:14:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-21 13:14:02,190 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-21 13:14:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:02,190 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-21 13:14:02,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-21 13:14:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:02,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:02,192 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:02,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:02,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 13:14:02,409 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash -883779623, now seen corresponding path program 8 times [2021-08-21 13:14:02,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:02,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135758886] [2021-08-21 13:14:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:02,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:02,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:02,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135758886] [2021-08-21 13:14:02,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135758886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:02,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940763655] [2021-08-21 13:14:02,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:02,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:02,459 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) [2021-08-21 13:14:02,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 13:14:02,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:02,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:02,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:02,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940763655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:02,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:02,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:14:02,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459950673] [2021-08-21 13:14:02,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:02,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:02,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:02,899 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:03,058 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-08-21 13:14:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:14:03,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:03,061 INFO L225 Difference]: With dead ends: 710 [2021-08-21 13:14:03,062 INFO L226 Difference]: Without dead ends: 672 [2021-08-21 13:14:03,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:14:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-21 13:14:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-21 13:14:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-21 13:14:03,072 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-21 13:14:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:03,072 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-21 13:14:03,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-21 13:14:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:03,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:03,073 INFO L512 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] [2021-08-21 13:14:03,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:03,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:03,295 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:03,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1589736955, now seen corresponding path program 2 times [2021-08-21 13:14:03,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:03,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167497446] [2021-08-21 13:14:03,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:03,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:03,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:03,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167497446] [2021-08-21 13:14:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167497446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:03,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397521489] [2021-08-21 13:14:03,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:03,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:03,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:03,340 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) [2021-08-21 13:14:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 13:14:03,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:03,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:14:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:03,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397521489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:03,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:03,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:14:03,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719499205] [2021-08-21 13:14:03,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:14:03,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:14:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:14:03,750 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:03,846 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-08-21 13:14:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:14:03,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:03,850 INFO L225 Difference]: With dead ends: 830 [2021-08-21 13:14:03,850 INFO L226 Difference]: Without dead ends: 830 [2021-08-21 13:14:03,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-21 13:14:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-21 13:14:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-21 13:14:03,864 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-21 13:14:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:03,865 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-21 13:14:03,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-21 13:14:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:03,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:03,866 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:03,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:04,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 13:14:04,086 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:04,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1358548775, now seen corresponding path program 9 times [2021-08-21 13:14:04,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:04,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128725681] [2021-08-21 13:14:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:04,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:04,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128725681] [2021-08-21 13:14:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128725681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499038540] [2021-08-21 13:14:04,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:04,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:04,132 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) [2021-08-21 13:14:04,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 13:14:04,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:04,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:04,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499038540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:04,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:04,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:14:04,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051501307] [2021-08-21 13:14:04,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:14:04,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:14:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:14:04,546 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:04,848 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-08-21 13:14:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:14:04,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:04,853 INFO L225 Difference]: With dead ends: 1196 [2021-08-21 13:14:04,853 INFO L226 Difference]: Without dead ends: 1196 [2021-08-21 13:14:04,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:14:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-21 13:14:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-21 13:14:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-21 13:14:04,868 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-21 13:14:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:04,869 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-21 13:14:04,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-21 13:14:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:04,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:04,870 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:04,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:05,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 13:14:05,088 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2143462869, now seen corresponding path program 10 times [2021-08-21 13:14:05,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:05,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517341896] [2021-08-21 13:14:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:05,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:05,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:05,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517341896] [2021-08-21 13:14:05,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517341896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:05,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116726272] [2021-08-21 13:14:05,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:05,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:05,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:05,134 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) [2021-08-21 13:14:05,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 13:14:05,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116726272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:05,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:05,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:14:05,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149726678] [2021-08-21 13:14:05,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:14:05,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:14:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:14:05,560 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:05,986 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-08-21 13:14:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:14:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:06,009 INFO L225 Difference]: With dead ends: 1492 [2021-08-21 13:14:06,009 INFO L226 Difference]: Without dead ends: 1492 [2021-08-21 13:14:06,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:14:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-21 13:14:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-21 13:14:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-21 13:14:06,049 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-21 13:14:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:06,049 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-21 13:14:06,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-21 13:14:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:06,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:06,051 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:06,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:06,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 13:14:06,251 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:06,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1060440213, now seen corresponding path program 11 times [2021-08-21 13:14:06,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:06,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955323853] [2021-08-21 13:14:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:06,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:06,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:06,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955323853] [2021-08-21 13:14:06,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955323853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:06,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857412872] [2021-08-21 13:14:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:06,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:06,307 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) [2021-08-21 13:14:06,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 13:14:06,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:06,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:06,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:06,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857412872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:06,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:06,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:14:06,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539385180] [2021-08-21 13:14:06,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:06,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:06,812 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:07,026 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-08-21 13:14:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:14:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:07,031 INFO L225 Difference]: With dead ends: 1258 [2021-08-21 13:14:07,031 INFO L226 Difference]: Without dead ends: 1248 [2021-08-21 13:14:07,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:14:07,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-21 13:14:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-21 13:14:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-21 13:14:07,047 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-21 13:14:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:07,047 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-21 13:14:07,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-21 13:14:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:07,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:07,048 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:07,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 13:14:07,266 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1763448965, now seen corresponding path program 12 times [2021-08-21 13:14:07,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:07,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259960309] [2021-08-21 13:14:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:07,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:07,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:07,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259960309] [2021-08-21 13:14:07,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259960309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:07,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220564860] [2021-08-21 13:14:07,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:07,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:07,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:07,316 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) [2021-08-21 13:14:07,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 13:14:07,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:14:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:07,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220564860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:07,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:07,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:14:07,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695851621] [2021-08-21 13:14:07,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:07,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:07,783 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:08,057 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-08-21 13:14:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:14:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:08,062 INFO L225 Difference]: With dead ends: 1329 [2021-08-21 13:14:08,062 INFO L226 Difference]: Without dead ends: 1329 [2021-08-21 13:14:08,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:14:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-21 13:14:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-21 13:14:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-21 13:14:08,077 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-21 13:14:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:08,077 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-21 13:14:08,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-21 13:14:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:08,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:08,094 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:08,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:08,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:08,311 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:08,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1205384683, now seen corresponding path program 13 times [2021-08-21 13:14:08,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:08,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393625804] [2021-08-21 13:14:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:08,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:08,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:08,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393625804] [2021-08-21 13:14:08,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393625804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:08,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157571290] [2021-08-21 13:14:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:08,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:08,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:08,355 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) [2021-08-21 13:14:08,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 13:14:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:08,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:08,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157571290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:08,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:08,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:14:08,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993026277] [2021-08-21 13:14:08,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:14:08,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:14:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:14:08,830 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:09,194 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-08-21 13:14:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:14:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:09,200 INFO L225 Difference]: With dead ends: 1548 [2021-08-21 13:14:09,201 INFO L226 Difference]: Without dead ends: 1544 [2021-08-21 13:14:09,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:14:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-21 13:14:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-21 13:14:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-21 13:14:09,245 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-21 13:14:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:09,245 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-21 13:14:09,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-21 13:14:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:09,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:09,248 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:09,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 13:14:09,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 13:14:09,465 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:09,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1826632537, now seen corresponding path program 14 times [2021-08-21 13:14:09,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:09,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825867025] [2021-08-21 13:14:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:09,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:09,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:09,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825867025] [2021-08-21 13:14:09,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825867025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:09,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196352695] [2021-08-21 13:14:09,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:09,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:09,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:09,514 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) [2021-08-21 13:14:09,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 13:14:09,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:09,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:09,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:10,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196352695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:10,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:10,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:10,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443541700] [2021-08-21 13:14:10,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:10,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:10,038 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:10,825 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-08-21 13:14:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:14:10,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:10,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:10,835 INFO L225 Difference]: With dead ends: 2734 [2021-08-21 13:14:10,835 INFO L226 Difference]: Without dead ends: 2734 [2021-08-21 13:14:10,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:14:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-21 13:14:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-21 13:14:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-21 13:14:10,861 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-21 13:14:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:10,861 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-21 13:14:10,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-21 13:14:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:10,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:10,863 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:10,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:11,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 13:14:11,077 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash -939430115, now seen corresponding path program 15 times [2021-08-21 13:14:11,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:11,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585970910] [2021-08-21 13:14:11,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:11,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:11,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:11,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585970910] [2021-08-21 13:14:11,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585970910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:11,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719579059] [2021-08-21 13:14:11,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:11,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:11,123 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) [2021-08-21 13:14:11,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 13:14:11,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:11,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:11,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:11,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719579059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:11,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:11,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:11,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660917784] [2021-08-21 13:14:11,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:11,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:11,603 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:12,317 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-08-21 13:14:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:14:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:12,329 INFO L225 Difference]: With dead ends: 2693 [2021-08-21 13:14:12,329 INFO L226 Difference]: Without dead ends: 2693 [2021-08-21 13:14:12,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:14:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-21 13:14:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-21 13:14:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-21 13:14:12,358 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-21 13:14:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:12,358 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-21 13:14:12,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-21 13:14:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:12,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:12,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:12,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:12,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:12,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1221238759, now seen corresponding path program 16 times [2021-08-21 13:14:12,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:12,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264541293] [2021-08-21 13:14:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:12,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:12,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:12,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264541293] [2021-08-21 13:14:12,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264541293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:12,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492088388] [2021-08-21 13:14:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:12,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:12,618 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) [2021-08-21 13:14:12,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 13:14:13,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:13,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492088388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:13,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:13,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:14:13,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933919055] [2021-08-21 13:14:13,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:14:13,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:14:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:14:13,180 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:13,824 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-08-21 13:14:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:14:13,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:13,830 INFO L225 Difference]: With dead ends: 2677 [2021-08-21 13:14:13,830 INFO L226 Difference]: Without dead ends: 2677 [2021-08-21 13:14:13,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:14:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-21 13:14:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-21 13:14:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-21 13:14:13,854 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-21 13:14:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:13,855 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-21 13:14:13,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-21 13:14:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:13,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:13,856 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:13,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:14,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:14,072 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2001411563, now seen corresponding path program 17 times [2021-08-21 13:14:14,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:14,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13242083] [2021-08-21 13:14:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:14,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:14,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:14,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13242083] [2021-08-21 13:14:14,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13242083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:14,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262618282] [2021-08-21 13:14:14,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:14,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:14,111 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) [2021-08-21 13:14:14,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 13:14:14,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:14:14,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:14,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262618282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:14,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:14,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:14:14,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273957563] [2021-08-21 13:14:14,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:14:14,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:14:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:14:14,564 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:15,170 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-08-21 13:14:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:14:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:15,178 INFO L225 Difference]: With dead ends: 2474 [2021-08-21 13:14:15,178 INFO L226 Difference]: Without dead ends: 2470 [2021-08-21 13:14:15,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:14:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-21 13:14:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-21 13:14:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-21 13:14:15,201 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-21 13:14:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:15,202 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-21 13:14:15,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-21 13:14:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:15,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:15,204 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:15,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:15,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:15,421 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:15,421 INFO L82 PathProgramCache]: Analyzing trace with hash 287738009, now seen corresponding path program 18 times [2021-08-21 13:14:15,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:15,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039933276] [2021-08-21 13:14:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:15,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:15,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:15,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039933276] [2021-08-21 13:14:15,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039933276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:15,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432345843] [2021-08-21 13:14:15,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:15,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:15,488 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) [2021-08-21 13:14:15,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 13:14:15,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:14:15,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:16,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432345843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:16,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:16,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:16,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600764526] [2021-08-21 13:14:16,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:16,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:16,037 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:16,749 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-08-21 13:14:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:14:16,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:16,754 INFO L225 Difference]: With dead ends: 2514 [2021-08-21 13:14:16,754 INFO L226 Difference]: Without dead ends: 2514 [2021-08-21 13:14:16,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:14:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-21 13:14:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-21 13:14:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-21 13:14:16,776 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-21 13:14:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:16,776 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-21 13:14:16,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-21 13:14:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:16,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:16,778 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:16,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:16,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 13:14:16,992 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -767639385, now seen corresponding path program 19 times [2021-08-21 13:14:16,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:16,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925653764] [2021-08-21 13:14:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:16,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:17,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:17,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925653764] [2021-08-21 13:14:17,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925653764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:17,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587675345] [2021-08-21 13:14:17,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:17,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:17,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:17,032 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) [2021-08-21 13:14:17,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 13:14:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:17,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587675345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:17,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:17,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:17,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443131618] [2021-08-21 13:14:17,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:17,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:17,583 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:18,272 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-08-21 13:14:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:14:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:18,277 INFO L225 Difference]: With dead ends: 2332 [2021-08-21 13:14:18,277 INFO L226 Difference]: Without dead ends: 2328 [2021-08-21 13:14:18,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:14:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-21 13:14:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-21 13:14:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-21 13:14:18,302 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-21 13:14:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:18,302 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-21 13:14:18,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-21 13:14:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:18,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:18,304 INFO L512 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] [2021-08-21 13:14:18,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:18,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 13:14:18,521 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1330941631, now seen corresponding path program 3 times [2021-08-21 13:14:18,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:18,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134036984] [2021-08-21 13:14:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:18,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:18,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:18,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134036984] [2021-08-21 13:14:18,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134036984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:18,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647285883] [2021-08-21 13:14:18,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:18,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:18,573 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) [2021-08-21 13:14:18,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 13:14:19,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:14:19,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:14:19,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:19,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647285883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:19,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:19,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:14:19,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788059710] [2021-08-21 13:14:19,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:14:19,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:14:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:14:19,110 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:19,184 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-08-21 13:14:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:14:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:19,186 INFO L225 Difference]: With dead ends: 929 [2021-08-21 13:14:19,186 INFO L226 Difference]: Without dead ends: 929 [2021-08-21 13:14:19,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:14:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-21 13:14:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-21 13:14:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-21 13:14:19,198 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-21 13:14:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:19,198 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-21 13:14:19,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-21 13:14:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:19,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:19,199 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:19,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:19,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:19,413 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:19,413 INFO L82 PathProgramCache]: Analyzing trace with hash -400741887, now seen corresponding path program 20 times [2021-08-21 13:14:19,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:19,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855823855] [2021-08-21 13:14:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:19,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:19,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:19,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855823855] [2021-08-21 13:14:19,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855823855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:19,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956833203] [2021-08-21 13:14:19,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:19,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:19,453 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) [2021-08-21 13:14:19,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 13:14:19,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:19,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:19,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:19,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956833203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:19,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:19,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:14:19,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872636906] [2021-08-21 13:14:19,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:14:19,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:14:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:14:19,986 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:20,269 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-08-21 13:14:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:14:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:20,273 INFO L225 Difference]: With dead ends: 1555 [2021-08-21 13:14:20,273 INFO L226 Difference]: Without dead ends: 1555 [2021-08-21 13:14:20,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:14:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-21 13:14:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-21 13:14:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-21 13:14:20,289 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-21 13:14:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:20,289 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-21 13:14:20,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-21 13:14:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:20,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:20,291 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:20,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:20,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:20,508 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1501937565, now seen corresponding path program 21 times [2021-08-21 13:14:20,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:20,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848900417] [2021-08-21 13:14:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:20,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:20,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:20,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848900417] [2021-08-21 13:14:20,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848900417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:20,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322537669] [2021-08-21 13:14:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:20,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:20,561 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) [2021-08-21 13:14:20,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 13:14:21,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:21,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322537669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:21,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:21,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:14:21,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650837953] [2021-08-21 13:14:21,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:14:21,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:14:21,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:14:21,102 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:21,381 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-08-21 13:14:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:14:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:21,384 INFO L225 Difference]: With dead ends: 1605 [2021-08-21 13:14:21,384 INFO L226 Difference]: Without dead ends: 1605 [2021-08-21 13:14:21,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:14:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-21 13:14:21,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-21 13:14:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-21 13:14:21,400 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-21 13:14:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:21,400 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-21 13:14:21,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-21 13:14:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:21,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:21,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:21,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:21,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 13:14:21,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1846909987, now seen corresponding path program 22 times [2021-08-21 13:14:21,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:21,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756627937] [2021-08-21 13:14:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:21,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:21,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:21,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756627937] [2021-08-21 13:14:21,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756627937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:21,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430022138] [2021-08-21 13:14:21,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:21,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:21,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:21,665 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) [2021-08-21 13:14:21,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 13:14:22,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:22,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:14:22,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430022138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:22,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:22,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:14:22,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270878865] [2021-08-21 13:14:22,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:14:22,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:14:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:14:22,267 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:22,433 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-08-21 13:14:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:14:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:22,435 INFO L225 Difference]: With dead ends: 1524 [2021-08-21 13:14:22,435 INFO L226 Difference]: Without dead ends: 1520 [2021-08-21 13:14:22,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:14:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-21 13:14:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-21 13:14:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-21 13:14:22,472 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-21 13:14:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:22,472 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-21 13:14:22,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-21 13:14:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:22,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:22,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:22,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:22,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 13:14:22,705 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1526355169, now seen corresponding path program 23 times [2021-08-21 13:14:22,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:22,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954179152] [2021-08-21 13:14:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:22,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:22,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:22,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954179152] [2021-08-21 13:14:22,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954179152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:22,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511848708] [2021-08-21 13:14:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:22,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:22,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:22,747 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) [2021-08-21 13:14:22,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 13:14:23,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:14:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:23,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511848708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:23,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:23,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:14:23,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670329151] [2021-08-21 13:14:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:14:23,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:14:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:14:23,317 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:23,550 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-08-21 13:14:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:14:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:23,553 INFO L225 Difference]: With dead ends: 1508 [2021-08-21 13:14:23,553 INFO L226 Difference]: Without dead ends: 1496 [2021-08-21 13:14:23,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:14:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-21 13:14:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-21 13:14:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-21 13:14:23,568 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-21 13:14:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:23,568 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-21 13:14:23,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-21 13:14:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:23,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:23,570 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:23,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:23,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 13:14:23,787 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:23,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1528032797, now seen corresponding path program 24 times [2021-08-21 13:14:23,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:23,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919420692] [2021-08-21 13:14:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:23,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:23,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:23,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919420692] [2021-08-21 13:14:23,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919420692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:23,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499930451] [2021-08-21 13:14:23,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:23,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:23,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:23,829 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) [2021-08-21 13:14:23,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 13:14:24,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:14:24,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:24,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:24,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499930451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:24,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:24,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:24,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215891541] [2021-08-21 13:14:24,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:24,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:24,425 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:24,998 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-08-21 13:14:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:14:24,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:25,003 INFO L225 Difference]: With dead ends: 2412 [2021-08-21 13:14:25,003 INFO L226 Difference]: Without dead ends: 2412 [2021-08-21 13:14:25,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:14:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-21 13:14:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-21 13:14:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-21 13:14:25,060 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-21 13:14:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:25,060 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-21 13:14:25,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-21 13:14:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:25,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:25,062 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:25,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:25,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 13:14:25,293 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:25,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:25,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1238029855, now seen corresponding path program 25 times [2021-08-21 13:14:25,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:25,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800462576] [2021-08-21 13:14:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:25,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:25,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:25,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800462576] [2021-08-21 13:14:25,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800462576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:25,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365823419] [2021-08-21 13:14:25,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:25,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:25,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:25,346 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) [2021-08-21 13:14:25,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 13:14:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:26,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365823419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:26,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:26,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:26,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657947327] [2021-08-21 13:14:26,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:26,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:26,011 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:26,474 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-08-21 13:14:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:14:26,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:26,478 INFO L225 Difference]: With dead ends: 2335 [2021-08-21 13:14:26,478 INFO L226 Difference]: Without dead ends: 2335 [2021-08-21 13:14:26,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:14:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-21 13:14:26,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-21 13:14:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:14:26,498 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:14:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:26,498 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:14:26,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:14:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:26,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:26,500 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:26,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:26,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:26,717 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash 922639019, now seen corresponding path program 26 times [2021-08-21 13:14:26,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:26,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176350218] [2021-08-21 13:14:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:26,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:26,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:26,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176350218] [2021-08-21 13:14:26,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176350218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:26,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479219858] [2021-08-21 13:14:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:26,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:26,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:26,763 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) [2021-08-21 13:14:26,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 13:14:27,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:27,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:27,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479219858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:27,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:27,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:14:27,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156310192] [2021-08-21 13:14:27,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:14:27,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:14:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:14:27,406 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:27,815 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-08-21 13:14:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:14:27,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:27,819 INFO L225 Difference]: With dead ends: 2285 [2021-08-21 13:14:27,819 INFO L226 Difference]: Without dead ends: 2285 [2021-08-21 13:14:27,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:14:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-21 13:14:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-21 13:14:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:14:27,838 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:14:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:27,838 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:14:27,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:14:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:27,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:27,840 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:27,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:28,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:28,057 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1994955993, now seen corresponding path program 27 times [2021-08-21 13:14:28,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:28,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282511900] [2021-08-21 13:14:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:28,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:28,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:28,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282511900] [2021-08-21 13:14:28,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282511900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:28,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108631761] [2021-08-21 13:14:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:28,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:28,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:28,107 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) [2021-08-21 13:14:28,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 13:14:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:28,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:28,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108631761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:28,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:28,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:14:28,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871020601] [2021-08-21 13:14:28,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:14:28,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:14:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:14:28,746 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:29,127 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-08-21 13:14:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:14:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:29,130 INFO L225 Difference]: With dead ends: 2176 [2021-08-21 13:14:29,130 INFO L226 Difference]: Without dead ends: 2172 [2021-08-21 13:14:29,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:14:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-21 13:14:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-21 13:14:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:14:29,148 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:14:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:29,149 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:14:29,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:14:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:29,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:29,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:29,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:29,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 13:14:29,367 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash -10861731, now seen corresponding path program 28 times [2021-08-21 13:14:29,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:29,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794870778] [2021-08-21 13:14:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:29,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:29,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:29,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794870778] [2021-08-21 13:14:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794870778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:29,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216875883] [2021-08-21 13:14:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:29,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:29,416 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) [2021-08-21 13:14:29,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 13:14:29,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:29,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:29,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216875883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:29,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:29,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:29,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158832266] [2021-08-21 13:14:29,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:29,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:29,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:29,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:29,999 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:30,424 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-08-21 13:14:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:14:30,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:30,428 INFO L225 Difference]: With dead ends: 2199 [2021-08-21 13:14:30,428 INFO L226 Difference]: Without dead ends: 2199 [2021-08-21 13:14:30,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:14:30,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-21 13:14:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-21 13:14:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:14:30,447 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:14:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:30,447 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:14:30,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:14:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:30,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:30,449 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:30,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:30,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:30,665 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1066239125, now seen corresponding path program 29 times [2021-08-21 13:14:30,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:30,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883840836] [2021-08-21 13:14:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:30,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:30,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:30,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883840836] [2021-08-21 13:14:30,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883840836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:30,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744526427] [2021-08-21 13:14:30,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:30,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:30,718 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) [2021-08-21 13:14:30,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 13:14:31,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:14:31,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:31,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744526427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:31,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:31,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:31,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280498799] [2021-08-21 13:14:31,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:31,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:31,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:31,486 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:31,828 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-08-21 13:14:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:14:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:31,832 INFO L225 Difference]: With dead ends: 2156 [2021-08-21 13:14:31,832 INFO L226 Difference]: Without dead ends: 2152 [2021-08-21 13:14:31,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:14:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-21 13:14:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-21 13:14:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:14:31,849 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:14:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:31,850 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:14:31,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:14:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:31,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:31,851 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:31,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 13:14:32,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:32,068 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:32,068 INFO L82 PathProgramCache]: Analyzing trace with hash 286172165, now seen corresponding path program 30 times [2021-08-21 13:14:32,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:32,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489054414] [2021-08-21 13:14:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:32,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:32,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:32,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489054414] [2021-08-21 13:14:32,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489054414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:32,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811999905] [2021-08-21 13:14:32,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:32,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:32,139 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) [2021-08-21 13:14:32,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 13:14:32,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:14:32,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:32,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:32,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811999905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:32,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:32,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:14:32,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982548190] [2021-08-21 13:14:32,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:14:32,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:32,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:14:32,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:14:32,806 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:33,163 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-08-21 13:14:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:14:33,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:33,166 INFO L225 Difference]: With dead ends: 2097 [2021-08-21 13:14:33,166 INFO L226 Difference]: Without dead ends: 2097 [2021-08-21 13:14:33,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:14:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-21 13:14:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-21 13:14:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-21 13:14:33,185 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-21 13:14:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:33,185 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-21 13:14:33,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-21 13:14:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:33,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:33,187 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:33,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 13:14:33,391 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1358489139, now seen corresponding path program 31 times [2021-08-21 13:14:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:33,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522095623] [2021-08-21 13:14:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:33,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:33,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:33,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522095623] [2021-08-21 13:14:33,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522095623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969946101] [2021-08-21 13:14:33,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:33,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:33,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:33,434 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) [2021-08-21 13:14:33,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 13:14:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:34,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969946101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:34,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:34,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:14:34,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60593316] [2021-08-21 13:14:34,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:14:34,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:14:34,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:14:34,097 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:34,382 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-08-21 13:14:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:14:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:34,386 INFO L225 Difference]: With dead ends: 1963 [2021-08-21 13:14:34,386 INFO L226 Difference]: Without dead ends: 1959 [2021-08-21 13:14:34,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:14:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-21 13:14:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-21 13:14:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-21 13:14:34,408 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-21 13:14:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:34,409 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-21 13:14:34,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-21 13:14:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:34,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:34,410 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:34,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:34,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 13:14:34,628 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1675641631, now seen corresponding path program 32 times [2021-08-21 13:14:34,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:34,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047128946] [2021-08-21 13:14:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:34,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:34,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:34,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047128946] [2021-08-21 13:14:34,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047128946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:34,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722481498] [2021-08-21 13:14:34,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:34,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:34,670 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) [2021-08-21 13:14:34,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 13:14:35,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:35,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:35,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:35,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:35,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722481498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:35,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:35,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:14:35,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711437637] [2021-08-21 13:14:35,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:14:35,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:14:35,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:14:35,404 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:35,680 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-08-21 13:14:35,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:14:35,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:35,683 INFO L225 Difference]: With dead ends: 1728 [2021-08-21 13:14:35,683 INFO L226 Difference]: Without dead ends: 1716 [2021-08-21 13:14:35,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:14:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-21 13:14:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-21 13:14:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-21 13:14:35,700 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-21 13:14:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:35,700 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-21 13:14:35,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-21 13:14:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:35,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:35,702 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:35,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:35,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 13:14:35,921 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1003355295, now seen corresponding path program 33 times [2021-08-21 13:14:35,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:35,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235500271] [2021-08-21 13:14:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:35,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:35,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:35,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235500271] [2021-08-21 13:14:35,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235500271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:35,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616624686] [2021-08-21 13:14:35,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:35,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:35,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:35,970 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) [2021-08-21 13:14:35,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 13:14:36,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:36,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:36,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:36,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616624686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:36,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:36,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:36,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571036513] [2021-08-21 13:14:36,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:36,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:36,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:36,666 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:36,991 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-08-21 13:14:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:14:36,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:36,994 INFO L225 Difference]: With dead ends: 1821 [2021-08-21 13:14:36,994 INFO L226 Difference]: Without dead ends: 1821 [2021-08-21 13:14:36,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:14:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-21 13:14:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-21 13:14:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-21 13:14:37,014 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-21 13:14:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:37,014 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-21 13:14:37,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-21 13:14:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:37,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:37,016 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:37,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:37,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:37,233 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2058732689, now seen corresponding path program 34 times [2021-08-21 13:14:37,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:37,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679298071] [2021-08-21 13:14:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:37,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:37,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:37,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679298071] [2021-08-21 13:14:37,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679298071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:37,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924006901] [2021-08-21 13:14:37,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:37,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:37,286 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) [2021-08-21 13:14:37,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 13:14:37,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:37,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:37,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924006901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:37,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:37,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:14:37,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515379445] [2021-08-21 13:14:37,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:14:37,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:14:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:14:37,898 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:38,204 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-08-21 13:14:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:14:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:38,207 INFO L225 Difference]: With dead ends: 1790 [2021-08-21 13:14:38,207 INFO L226 Difference]: Without dead ends: 1786 [2021-08-21 13:14:38,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:14:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-21 13:14:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-21 13:14:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-21 13:14:38,223 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-21 13:14:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:38,223 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-21 13:14:38,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-21 13:14:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:14:38,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:38,225 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:38,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:38,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 13:14:38,442 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash -575597751, now seen corresponding path program 35 times [2021-08-21 13:14:38,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:38,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475817821] [2021-08-21 13:14:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:38,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:38,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:38,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475817821] [2021-08-21 13:14:38,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475817821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:38,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614280955] [2021-08-21 13:14:38,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:38,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:38,493 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) [2021-08-21 13:14:38,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 13:14:39,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:14:39,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:14:39,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:39,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614280955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:39,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:39,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:14:39,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658593249] [2021-08-21 13:14:39,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:14:39,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:14:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:14:39,195 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:39,387 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-08-21 13:14:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:14:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:14:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:39,390 INFO L225 Difference]: With dead ends: 1649 [2021-08-21 13:14:39,390 INFO L226 Difference]: Without dead ends: 1637 [2021-08-21 13:14:39,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:14:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-21 13:14:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-21 13:14:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-21 13:14:39,420 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-21 13:14:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:39,420 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-21 13:14:39,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-21 13:14:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:39,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:39,422 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:39,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:39,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 13:14:39,645 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 201587259, now seen corresponding path program 4 times [2021-08-21 13:14:39,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:39,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540235064] [2021-08-21 13:14:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:39,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:40,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:40,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540235064] [2021-08-21 13:14:40,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540235064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:40,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251469257] [2021-08-21 13:14:40,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:40,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:40,463 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) [2021-08-21 13:14:40,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 13:14:41,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:14:41,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:42,293 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:14:42,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:14:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:42,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251469257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:42,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:42,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:14:42,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679839492] [2021-08-21 13:14:42,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:42,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:42,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:42,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:42,503 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:43,556 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-08-21 13:14:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:14:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:43,559 INFO L225 Difference]: With dead ends: 1517 [2021-08-21 13:14:43,559 INFO L226 Difference]: Without dead ends: 1502 [2021-08-21 13:14:43,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1238.1ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:14:43,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-08-21 13:14:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-08-21 13:14:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-21 13:14:43,575 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-21 13:14:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:43,575 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-21 13:14:43,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-21 13:14:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:43,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:43,577 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:43,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:43,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:43,796 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:43,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1826810757, now seen corresponding path program 5 times [2021-08-21 13:14:43,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:43,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175311335] [2021-08-21 13:14:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:43,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:44,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:44,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175311335] [2021-08-21 13:14:44,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175311335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:44,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798216857] [2021-08-21 13:14:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:44,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:44,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:44,851 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) [2021-08-21 13:14:44,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 13:14:45,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:14:45,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:14:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:46,530 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:14:46,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:14:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:46,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798216857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:46,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:46,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:14:46,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077925981] [2021-08-21 13:14:46,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:46,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:46,797 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:47,719 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-08-21 13:14:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:14:47,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:47,721 INFO L225 Difference]: With dead ends: 1495 [2021-08-21 13:14:47,721 INFO L226 Difference]: Without dead ends: 1480 [2021-08-21 13:14:47,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1142.5ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:14:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-08-21 13:14:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-08-21 13:14:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-21 13:14:47,736 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-21 13:14:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:47,737 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-21 13:14:47,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-21 13:14:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:47,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:47,738 INFO L512 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] [2021-08-21 13:14:47,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:47,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 13:14:47,956 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -235381449, now seen corresponding path program 36 times [2021-08-21 13:14:47,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:47,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978500214] [2021-08-21 13:14:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:47,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:48,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:48,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978500214] [2021-08-21 13:14:48,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978500214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:48,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266758664] [2021-08-21 13:14:48,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:48,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:48,842 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) [2021-08-21 13:14:48,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 13:14:49,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:14:49,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:49,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:14:49,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:50,884 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:14:50,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 99 [2021-08-21 13:14:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:51,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266758664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:51,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:51,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:14:51,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310132976] [2021-08-21 13:14:51,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:14:51,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:14:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:14:51,034 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:55,098 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-08-21 13:14:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:14:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:55,101 INFO L225 Difference]: With dead ends: 1658 [2021-08-21 13:14:55,101 INFO L226 Difference]: Without dead ends: 1643 [2021-08-21 13:14:55,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 3997.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:14:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-08-21 13:14:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-08-21 13:14:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-21 13:14:55,117 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-21 13:14:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:55,118 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-21 13:14:55,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-21 13:14:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:55,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:55,120 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:55,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:55,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:55,338 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:55,339 INFO L82 PathProgramCache]: Analyzing trace with hash 569665727, now seen corresponding path program 6 times [2021-08-21 13:14:55,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:55,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458558515] [2021-08-21 13:14:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:55,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:56,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:56,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458558515] [2021-08-21 13:14:56,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458558515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:56,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553273474] [2021-08-21 13:14:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:56,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:56,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:56,229 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) [2021-08-21 13:14:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 13:14:57,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:14:57,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:57,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:14:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:58,020 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:14:58,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:14:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:58,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553273474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:58,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:58,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:14:58,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168248857] [2021-08-21 13:14:58,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:58,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:58,291 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:59,268 INFO L93 Difference]: Finished difference Result 1371 states and 4433 transitions. [2021-08-21 13:14:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:14:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:59,271 INFO L225 Difference]: With dead ends: 1371 [2021-08-21 13:14:59,271 INFO L226 Difference]: Without dead ends: 1356 [2021-08-21 13:14:59,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1242.3ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:14:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-08-21 13:14:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1189. [2021-08-21 13:14:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-08-21 13:14:59,286 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-08-21 13:14:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:59,286 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-08-21 13:14:59,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-08-21 13:14:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:59,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:59,288 INFO L512 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] [2021-08-21 13:14:59,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:59,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:59,506 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2120047291, now seen corresponding path program 37 times [2021-08-21 13:14:59,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:59,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315722178] [2021-08-21 13:14:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:59,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:59,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:59,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315722178] [2021-08-21 13:14:59,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315722178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:59,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834767904] [2021-08-21 13:14:59,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:59,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:59,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:59,966 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) [2021-08-21 13:14:59,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 13:15:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:15:00,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:15:02,138 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:15:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 115 [2021-08-21 13:15:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:02,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834767904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:02,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:02,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:15:02,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352587058] [2021-08-21 13:15:02,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:02,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:02,377 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:05,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:05,108 INFO L93 Difference]: Finished difference Result 1808 states and 5771 transitions. [2021-08-21 13:15:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:15:05,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:05,112 INFO L225 Difference]: With dead ends: 1808 [2021-08-21 13:15:05,112 INFO L226 Difference]: Without dead ends: 1793 [2021-08-21 13:15:05,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2628.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:15:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-08-21 13:15:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1201. [2021-08-21 13:15:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-08-21 13:15:05,137 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-08-21 13:15:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:05,138 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-08-21 13:15:05,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-08-21 13:15:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:05,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:05,140 INFO L512 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] [2021-08-21 13:15:05,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:05,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 13:15:05,356 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1143728447, now seen corresponding path program 38 times [2021-08-21 13:15:05,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:05,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004323745] [2021-08-21 13:15:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:05,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:05,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:05,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004323745] [2021-08-21 13:15:05,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004323745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:05,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256143055] [2021-08-21 13:15:05,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:15:05,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:05,971 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) [2021-08-21 13:15:05,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 13:15:07,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:15:07,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:07,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 13:15:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:08,344 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-21 13:15:08,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 127 [2021-08-21 13:15:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:11,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256143055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:11,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:11,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 13:15:11,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132783415] [2021-08-21 13:15:11,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:15:11,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:15:11,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:15:11,558 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:16,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:16,677 INFO L93 Difference]: Finished difference Result 1920 states and 5923 transitions. [2021-08-21 13:15:16,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:15:16,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:16,680 INFO L225 Difference]: With dead ends: 1920 [2021-08-21 13:15:16,680 INFO L226 Difference]: Without dead ends: 1890 [2021-08-21 13:15:16,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 5056.1ms TimeCoverageRelationStatistics Valid=517, Invalid=2905, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:15:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-08-21 13:15:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1301. [2021-08-21 13:15:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3176923076923077) internal successors, (4313), 1300 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4313 transitions. [2021-08-21 13:15:16,699 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4313 transitions. Word has length 26 [2021-08-21 13:15:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:16,699 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 4313 transitions. [2021-08-21 13:15:16,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4313 transitions. [2021-08-21 13:15:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:16,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:16,702 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:16,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:16,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 13:15:16,924 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -941338781, now seen corresponding path program 7 times [2021-08-21 13:15:16,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:16,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532938613] [2021-08-21 13:15:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:16,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:17,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:17,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532938613] [2021-08-21 13:15:17,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532938613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:17,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434007002] [2021-08-21 13:15:17,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:15:17,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:17,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:17,606 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) [2021-08-21 13:15:17,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 13:15:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:15:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:20,147 INFO L354 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-08-21 13:15:20,147 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 112 [2021-08-21 13:15:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:20,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434007002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:20,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:20,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:15:20,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008832666] [2021-08-21 13:15:20,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:15:20,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:15:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:20,381 INFO L87 Difference]: Start difference. First operand 1301 states and 4313 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:21,776 INFO L93 Difference]: Finished difference Result 1696 states and 5502 transitions. [2021-08-21 13:15:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:15:21,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:21,780 INFO L225 Difference]: With dead ends: 1696 [2021-08-21 13:15:21,780 INFO L226 Difference]: Without dead ends: 1681 [2021-08-21 13:15:21,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1550.9ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:15:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-08-21 13:15:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1312. [2021-08-21 13:15:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.315026697177727) internal successors, (4346), 1311 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4346 transitions. [2021-08-21 13:15:21,802 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4346 transitions. Word has length 26 [2021-08-21 13:15:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 4346 transitions. [2021-08-21 13:15:21,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4346 transitions. [2021-08-21 13:15:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:21,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:21,805 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:21,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:22,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 13:15:22,021 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1325230499, now seen corresponding path program 8 times [2021-08-21 13:15:22,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:22,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314353338] [2021-08-21 13:15:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:22,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:23,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:23,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314353338] [2021-08-21 13:15:23,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314353338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:23,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226696247] [2021-08-21 13:15:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:15:23,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:23,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:23,098 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) [2021-08-21 13:15:23,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 13:15:24,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:15:24,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:15:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:25,474 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:15:25,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 243 treesize of output 134 [2021-08-21 13:15:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:26,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226696247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:26,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:26,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:15:26,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827398633] [2021-08-21 13:15:26,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:15:26,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:15:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:15:26,793 INFO L87 Difference]: Start difference. First operand 1312 states and 4346 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:31,150 INFO L93 Difference]: Finished difference Result 1972 states and 6244 transitions. [2021-08-21 13:15:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:15:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:31,155 INFO L225 Difference]: With dead ends: 1972 [2021-08-21 13:15:31,155 INFO L226 Difference]: Without dead ends: 1957 [2021-08-21 13:15:31,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 4133.4ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:15:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-08-21 13:15:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1323. [2021-08-21 13:15:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.32375189107413) internal successors, (4394), 1322 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4394 transitions. [2021-08-21 13:15:31,180 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4394 transitions. Word has length 26 [2021-08-21 13:15:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:31,180 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 4394 transitions. [2021-08-21 13:15:31,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4394 transitions. [2021-08-21 13:15:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:31,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:31,182 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:31,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:31,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:31,397 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash -612179209, now seen corresponding path program 9 times [2021-08-21 13:15:31,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:31,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862329683] [2021-08-21 13:15:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:31,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:32,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:32,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862329683] [2021-08-21 13:15:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862329683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:32,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417628987] [2021-08-21 13:15:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:15:32,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:32,287 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) [2021-08-21 13:15:32,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 13:15:33,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:15:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 13:15:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:35,050 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:15:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:15:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:35,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417628987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:35,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:35,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:15:35,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021876688] [2021-08-21 13:15:35,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:15:35,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:15:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:35,259 INFO L87 Difference]: Start difference. First operand 1323 states and 4394 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:37,198 INFO L93 Difference]: Finished difference Result 1950 states and 6307 transitions. [2021-08-21 13:15:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:15:37,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:37,201 INFO L225 Difference]: With dead ends: 1950 [2021-08-21 13:15:37,201 INFO L226 Difference]: Without dead ends: 1935 [2021-08-21 13:15:37,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2072.4ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:15:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-08-21 13:15:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1332. [2021-08-21 13:15:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3283245679939895) internal successors, (4430), 1331 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4430 transitions. [2021-08-21 13:15:37,223 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4430 transitions. Word has length 26 [2021-08-21 13:15:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:37,223 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 4430 transitions. [2021-08-21 13:15:37,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4430 transitions. [2021-08-21 13:15:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:37,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:37,225 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:37,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:37,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 13:15:37,441 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash -779988301, now seen corresponding path program 10 times [2021-08-21 13:15:37,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:37,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456019715] [2021-08-21 13:15:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:37,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:38,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:38,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456019715] [2021-08-21 13:15:38,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456019715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:38,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915608473] [2021-08-21 13:15:38,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:15:38,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:38,172 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) [2021-08-21 13:15:38,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 13:15:39,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:15:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:15:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:40,634 INFO L354 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-08-21 13:15:40,635 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 108 [2021-08-21 13:15:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:41,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915608473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:41,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:41,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:15:41,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187958034] [2021-08-21 13:15:41,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:15:41,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:15:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:15:41,029 INFO L87 Difference]: Start difference. First operand 1332 states and 4430 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:41,769 INFO L93 Difference]: Finished difference Result 1634 states and 5357 transitions. [2021-08-21 13:15:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:15:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:41,771 INFO L225 Difference]: With dead ends: 1634 [2021-08-21 13:15:41,771 INFO L226 Difference]: Without dead ends: 1619 [2021-08-21 13:15:41,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 888.9ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:15:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-08-21 13:15:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1332. [2021-08-21 13:15:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3283245679939895) internal successors, (4430), 1331 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4430 transitions. [2021-08-21 13:15:41,789 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4430 transitions. Word has length 26 [2021-08-21 13:15:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:41,789 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 4430 transitions. [2021-08-21 13:15:41,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:41,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4430 transitions. [2021-08-21 13:15:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:41,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:41,792 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:41,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:42,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 13:15:42,012 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1447462967, now seen corresponding path program 11 times [2021-08-21 13:15:42,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:42,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775021473] [2021-08-21 13:15:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:42,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:42,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:42,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775021473] [2021-08-21 13:15:42,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775021473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:42,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196733394] [2021-08-21 13:15:42,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:15:42,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:42,719 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) [2021-08-21 13:15:42,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 13:15:44,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:15:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:15:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:45,211 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:15:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 93 [2021-08-21 13:15:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:45,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196733394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:45,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:45,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:15:45,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637517513] [2021-08-21 13:15:45,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:15:45,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:15:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:15:45,867 INFO L87 Difference]: Start difference. First operand 1332 states and 4430 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:49,889 INFO L93 Difference]: Finished difference Result 2267 states and 7274 transitions. [2021-08-21 13:15:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:15:49,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:49,894 INFO L225 Difference]: With dead ends: 2267 [2021-08-21 13:15:49,894 INFO L226 Difference]: Without dead ends: 2237 [2021-08-21 13:15:49,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 3715.4ms TimeCoverageRelationStatistics Valid=411, Invalid=1845, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:15:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-08-21 13:15:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1335. [2021-08-21 13:15:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.3320839580209896) internal successors, (4445), 1334 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4445 transitions. [2021-08-21 13:15:49,915 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4445 transitions. Word has length 26 [2021-08-21 13:15:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:49,916 INFO L470 AbstractCegarLoop]: Abstraction has 1335 states and 4445 transitions. [2021-08-21 13:15:49,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4445 transitions. [2021-08-21 13:15:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:49,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:49,920 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:49,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:50,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:50,133 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1815321045, now seen corresponding path program 12 times [2021-08-21 13:15:50,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:50,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979473126] [2021-08-21 13:15:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:50,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:50,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:50,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979473126] [2021-08-21 13:15:50,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979473126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:50,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617663858] [2021-08-21 13:15:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:15:50,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:50,891 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) [2021-08-21 13:15:50,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 13:15:52,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:15:52,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:52,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:15:52,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:53,595 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-21 13:15:53,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 116 [2021-08-21 13:15:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:54,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617663858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:54,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:54,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:15:54,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119246817] [2021-08-21 13:15:54,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:54,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:54,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:54,093 INFO L87 Difference]: Start difference. First operand 1335 states and 4445 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:57,169 INFO L93 Difference]: Finished difference Result 2103 states and 6784 transitions. [2021-08-21 13:15:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:15:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:57,173 INFO L225 Difference]: With dead ends: 2103 [2021-08-21 13:15:57,173 INFO L226 Difference]: Without dead ends: 2088 [2021-08-21 13:15:57,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2852.0ms TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:15:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-08-21 13:15:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1338. [2021-08-21 13:15:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.3335826477187736) internal successors, (4457), 1337 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4457 transitions. [2021-08-21 13:15:57,193 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4457 transitions. Word has length 26 [2021-08-21 13:15:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:57,193 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 4457 transitions. [2021-08-21 13:15:57,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4457 transitions. [2021-08-21 13:15:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:57,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:57,196 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:57,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 13:15:57,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 13:15:57,417 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -920650689, now seen corresponding path program 13 times [2021-08-21 13:15:57,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:57,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061873978] [2021-08-21 13:15:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:57,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:58,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:58,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061873978] [2021-08-21 13:15:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061873978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:58,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177560298] [2021-08-21 13:15:58,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:15:58,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:58,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:58,018 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) [2021-08-21 13:15:58,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 13:15:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:15:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:00,986 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:16:00,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:16:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:01,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177560298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:01,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:01,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:16:01,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280928304] [2021-08-21 13:16:01,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:16:01,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:16:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:16:01,230 INFO L87 Difference]: Start difference. First operand 1338 states and 4457 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:03,416 INFO L93 Difference]: Finished difference Result 2096 states and 6663 transitions. [2021-08-21 13:16:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:16:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:03,420 INFO L225 Difference]: With dead ends: 2096 [2021-08-21 13:16:03,420 INFO L226 Difference]: Without dead ends: 2081 [2021-08-21 13:16:03,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2108.9ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:16:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-08-21 13:16:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1340. [2021-08-21 13:16:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 3.333831217326363) internal successors, (4464), 1339 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 4464 transitions. [2021-08-21 13:16:03,440 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 4464 transitions. Word has length 26 [2021-08-21 13:16:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:03,440 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 4464 transitions. [2021-08-21 13:16:03,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 4464 transitions. [2021-08-21 13:16:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:03,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:03,443 INFO L512 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] [2021-08-21 13:16:03,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:03,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:03,657 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1875492613, now seen corresponding path program 39 times [2021-08-21 13:16:03,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:03,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175676037] [2021-08-21 13:16:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:03,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:04,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:04,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175676037] [2021-08-21 13:16:04,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175676037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:04,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070254221] [2021-08-21 13:16:04,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:16:04,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:04,208 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) [2021-08-21 13:16:04,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 13:16:06,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:16:06,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 13:16:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:07,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 13:16:07,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:16:07,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:16:07,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 13:16:07,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 94 [2021-08-21 13:16:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:07,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070254221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:07,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:07,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-08-21 13:16:07,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750735603] [2021-08-21 13:16:07,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:16:07,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:16:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:16:07,400 INFO L87 Difference]: Start difference. First operand 1340 states and 4464 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:11,186 INFO L93 Difference]: Finished difference Result 2961 states and 9193 transitions. [2021-08-21 13:16:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:16:11,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:11,191 INFO L225 Difference]: With dead ends: 2961 [2021-08-21 13:16:11,191 INFO L226 Difference]: Without dead ends: 2874 [2021-08-21 13:16:11,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 3494.8ms TimeCoverageRelationStatistics Valid=607, Invalid=3175, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:16:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-08-21 13:16:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1373. [2021-08-21 13:16:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.337463556851312) internal successors, (4579), 1372 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4579 transitions. [2021-08-21 13:16:11,215 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4579 transitions. Word has length 26 [2021-08-21 13:16:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:11,215 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 4579 transitions. [2021-08-21 13:16:11,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4579 transitions. [2021-08-21 13:16:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:11,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:11,218 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:11,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:11,440 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,SelfDestructingSolverStorable53 [2021-08-21 13:16:11,441 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash 669219687, now seen corresponding path program 14 times [2021-08-21 13:16:11,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:11,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585581391] [2021-08-21 13:16:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:11,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:12,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:12,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585581391] [2021-08-21 13:16:12,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585581391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:12,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668726035] [2021-08-21 13:16:12,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:16:12,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:12,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:12,103 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) [2021-08-21 13:16:12,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 13:16:14,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:16:14,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:16:14,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:15,617 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:16:15,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2021-08-21 13:16:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:16,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668726035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:16,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:16,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:16:16,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298820930] [2021-08-21 13:16:16,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:16:16,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:16:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:16:16,433 INFO L87 Difference]: Start difference. First operand 1373 states and 4579 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:20,881 INFO L93 Difference]: Finished difference Result 2180 states and 6904 transitions. [2021-08-21 13:16:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:16:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:20,885 INFO L225 Difference]: With dead ends: 2180 [2021-08-21 13:16:20,885 INFO L226 Difference]: Without dead ends: 2150 [2021-08-21 13:16:20,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 4076.2ms TimeCoverageRelationStatistics Valid=353, Invalid=1717, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:16:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-08-21 13:16:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1372. [2021-08-21 13:16:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.3340627279358133) internal successors, (4571), 1371 states have internal predecessors, (4571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4571 transitions. [2021-08-21 13:16:20,907 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4571 transitions. Word has length 26 [2021-08-21 13:16:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:20,907 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 4571 transitions. [2021-08-21 13:16:20,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4571 transitions. [2021-08-21 13:16:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:20,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:20,909 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:20,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:21,124 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,SelfDestructingSolverStorable54 [2021-08-21 13:16:21,125 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1227664005, now seen corresponding path program 15 times [2021-08-21 13:16:21,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:21,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699589022] [2021-08-21 13:16:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:21,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:21,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:21,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699589022] [2021-08-21 13:16:21,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699589022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:21,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33923397] [2021-08-21 13:16:21,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:16:21,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:21,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:21,765 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) [2021-08-21 13:16:21,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 13:16:24,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:16:24,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:16:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:24,991 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:16:24,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 97 [2021-08-21 13:16:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:25,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33923397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:25,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:25,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:16:25,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827735228] [2021-08-21 13:16:25,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:25,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:25,452 INFO L87 Difference]: Start difference. First operand 1372 states and 4571 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:29,545 INFO L93 Difference]: Finished difference Result 2404 states and 7636 transitions. [2021-08-21 13:16:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:16:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:29,550 INFO L225 Difference]: With dead ends: 2404 [2021-08-21 13:16:29,550 INFO L226 Difference]: Without dead ends: 2389 [2021-08-21 13:16:29,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 3933.9ms TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:16:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-08-21 13:16:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 1369. [2021-08-21 13:16:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 3.3326023391812867) internal successors, (4559), 1368 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 4559 transitions. [2021-08-21 13:16:29,573 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 4559 transitions. Word has length 26 [2021-08-21 13:16:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 4559 transitions. [2021-08-21 13:16:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 4559 transitions. [2021-08-21 13:16:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:29,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:29,575 INFO L512 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] [2021-08-21 13:16:29,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:29,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:29,777 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash -673180245, now seen corresponding path program 40 times [2021-08-21 13:16:29,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:29,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014060228] [2021-08-21 13:16:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:29,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:30,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:30,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014060228] [2021-08-21 13:16:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014060228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:30,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854683889] [2021-08-21 13:16:30,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:16:30,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:30,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:30,376 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) [2021-08-21 13:16:30,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 13:16:32,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:16:32,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:32,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:16:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:16:33,761 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:16:33,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 160 treesize of output 108 [2021-08-21 13:16:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:36,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854683889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:36,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:36,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-21 13:16:36,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779245193] [2021-08-21 13:16:36,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:16:36,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:16:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=343, Unknown=1, NotChecked=0, Total=420 [2021-08-21 13:16:36,255 INFO L87 Difference]: Start difference. First operand 1369 states and 4559 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:41,115 INFO L93 Difference]: Finished difference Result 2971 states and 9365 transitions. [2021-08-21 13:16:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:16:41,115 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:41,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:41,121 INFO L225 Difference]: With dead ends: 2971 [2021-08-21 13:16:41,121 INFO L226 Difference]: Without dead ends: 2926 [2021-08-21 13:16:41,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 6597.9ms TimeCoverageRelationStatistics Valid=605, Invalid=2816, Unknown=1, NotChecked=0, Total=3422 [2021-08-21 13:16:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-21 13:16:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1372. [2021-08-21 13:16:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.334792122538293) internal successors, (4572), 1371 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4572 transitions. [2021-08-21 13:16:41,146 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4572 transitions. Word has length 26 [2021-08-21 13:16:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:41,147 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 4572 transitions. [2021-08-21 13:16:41,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4572 transitions. [2021-08-21 13:16:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:41,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:41,149 INFO L512 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] [2021-08-21 13:16:41,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:41,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:41,372 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:41,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1160468407, now seen corresponding path program 41 times [2021-08-21 13:16:41,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:41,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005342963] [2021-08-21 13:16:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:41,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:41,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:41,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005342963] [2021-08-21 13:16:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005342963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:41,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123407053] [2021-08-21 13:16:41,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:16:41,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:41,951 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:41,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 13:16:44,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:16:44,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 13:16:44,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:45,051 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:16:45,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 117 [2021-08-21 13:16:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:45,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123407053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:45,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:45,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 13:16:45,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542573577] [2021-08-21 13:16:45,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:45,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:45,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:45,895 INFO L87 Difference]: Start difference. First operand 1372 states and 4572 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:48,150 INFO L93 Difference]: Finished difference Result 1938 states and 6164 transitions. [2021-08-21 13:16:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:16:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:48,153 INFO L225 Difference]: With dead ends: 1938 [2021-08-21 13:16:48,153 INFO L226 Difference]: Without dead ends: 1908 [2021-08-21 13:16:48,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 2134.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:16:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-08-21 13:16:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1373. [2021-08-21 13:16:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.336734693877551) internal successors, (4578), 1372 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4578 transitions. [2021-08-21 13:16:48,173 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4578 transitions. Word has length 26 [2021-08-21 13:16:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:48,173 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 4578 transitions. [2021-08-21 13:16:48,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4578 transitions. [2021-08-21 13:16:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:48,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:48,175 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:48,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:48,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:48,397 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -682543457, now seen corresponding path program 16 times [2021-08-21 13:16:48,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:48,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015680821] [2021-08-21 13:16:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:48,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:48,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:48,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015680821] [2021-08-21 13:16:48,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015680821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:48,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974680855] [2021-08-21 13:16:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:16:48,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:48,991 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:48,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 13:16:51,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:16:51,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:51,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:16:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:52,625 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:16:52,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:16:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:52,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974680855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:52,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:52,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:16:52,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443913708] [2021-08-21 13:16:52,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:16:52,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:16:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:16:52,819 INFO L87 Difference]: Start difference. First operand 1373 states and 4578 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:53,693 INFO L93 Difference]: Finished difference Result 1759 states and 5746 transitions. [2021-08-21 13:16:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:16:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:53,696 INFO L225 Difference]: With dead ends: 1759 [2021-08-21 13:16:53,696 INFO L226 Difference]: Without dead ends: 1744 [2021-08-21 13:16:53,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1043.2ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:16:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-08-21 13:16:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1390. [2021-08-21 13:16:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.3326133909287257) internal successors, (4629), 1389 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4629 transitions. [2021-08-21 13:16:53,730 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4629 transitions. Word has length 26 [2021-08-21 13:16:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:53,730 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 4629 transitions. [2021-08-21 13:16:53,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4629 transitions. [2021-08-21 13:16:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:53,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:53,742 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:53,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:53,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 13:16:53,957 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1033636639, now seen corresponding path program 17 times [2021-08-21 13:16:53,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:53,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755792905] [2021-08-21 13:16:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:53,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:55,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:55,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755792905] [2021-08-21 13:16:55,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755792905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:55,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024259892] [2021-08-21 13:16:55,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:16:55,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:55,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:55,085 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:55,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 13:16:57,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:16:57,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:57,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:16:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:59,006 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:16:59,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 111 [2021-08-21 13:16:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:59,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024259892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:59,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:59,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:16:59,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546983663] [2021-08-21 13:16:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:16:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:16:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:16:59,212 INFO L87 Difference]: Start difference. First operand 1390 states and 4629 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:00,726 INFO L93 Difference]: Finished difference Result 1801 states and 5831 transitions. [2021-08-21 13:17:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:17:00,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:00,730 INFO L225 Difference]: With dead ends: 1801 [2021-08-21 13:17:00,730 INFO L226 Difference]: Without dead ends: 1771 [2021-08-21 13:17:00,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1704.5ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:17:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-08-21 13:17:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1382. [2021-08-21 13:17:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 1381 states have (on average 3.336712527154236) internal successors, (4608), 1381 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 4608 transitions. [2021-08-21 13:17:00,748 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 4608 transitions. Word has length 26 [2021-08-21 13:17:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:00,748 INFO L470 AbstractCegarLoop]: Abstraction has 1382 states and 4608 transitions. [2021-08-21 13:17:00,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 4608 transitions. [2021-08-21 13:17:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:00,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:00,751 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:00,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 13:17:00,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 13:17:00,968 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash -353383885, now seen corresponding path program 18 times [2021-08-21 13:17:00,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:00,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459351551] [2021-08-21 13:17:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:00,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:01,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:01,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459351551] [2021-08-21 13:17:01,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459351551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:01,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434804455] [2021-08-21 13:17:01,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:17:01,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:01,609 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:01,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 13:17:04,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:17:04,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:17:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:05,532 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:17:05,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:17:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:05,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434804455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:05,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:17:05,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888574885] [2021-08-21 13:17:05,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:05,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:05,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:05,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:05,715 INFO L87 Difference]: Start difference. First operand 1382 states and 4608 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:07,251 INFO L93 Difference]: Finished difference Result 2005 states and 6512 transitions. [2021-08-21 13:17:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:17:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:07,255 INFO L225 Difference]: With dead ends: 2005 [2021-08-21 13:17:07,255 INFO L226 Difference]: Without dead ends: 1990 [2021-08-21 13:17:07,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1531.2ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:17:07,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-08-21 13:17:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1391. [2021-08-21 13:17:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3410071942446042) internal successors, (4644), 1390 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4644 transitions. [2021-08-21 13:17:07,274 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4644 transitions. Word has length 26 [2021-08-21 13:17:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:07,275 INFO L470 AbstractCegarLoop]: Abstraction has 1391 states and 4644 transitions. [2021-08-21 13:17:07,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4644 transitions. [2021-08-21 13:17:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:07,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:07,277 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:07,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:07,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:07,502 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:07,502 INFO L82 PathProgramCache]: Analyzing trace with hash -521192977, now seen corresponding path program 19 times [2021-08-21 13:17:07,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:07,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145500028] [2021-08-21 13:17:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:07,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:08,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:08,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145500028] [2021-08-21 13:17:08,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145500028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:08,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411313089] [2021-08-21 13:17:08,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:17:08,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:08,141 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:08,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 13:17:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:17:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:11,883 INFO L354 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-08-21 13:17:11,883 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 108 [2021-08-21 13:17:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:12,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411313089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:12,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:12,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:17:12,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595297486] [2021-08-21 13:17:12,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:17:12,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:17:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:17:12,139 INFO L87 Difference]: Start difference. First operand 1391 states and 4644 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:12,642 INFO L93 Difference]: Finished difference Result 1698 states and 5588 transitions. [2021-08-21 13:17:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:17:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:12,645 INFO L225 Difference]: With dead ends: 1698 [2021-08-21 13:17:12,645 INFO L226 Difference]: Without dead ends: 1683 [2021-08-21 13:17:12,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 727.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-08-21 13:17:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1385. [2021-08-21 13:17:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 3.3403179190751446) internal successors, (4623), 1384 states have internal predecessors, (4623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4623 transitions. [2021-08-21 13:17:12,663 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4623 transitions. Word has length 26 [2021-08-21 13:17:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:12,663 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 4623 transitions. [2021-08-21 13:17:12,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4623 transitions. [2021-08-21 13:17:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:12,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:12,666 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:12,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:12,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:12,881 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1706258291, now seen corresponding path program 20 times [2021-08-21 13:17:12,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:12,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563871763] [2021-08-21 13:17:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:12,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:13,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:13,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563871763] [2021-08-21 13:17:13,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563871763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:13,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288544204] [2021-08-21 13:17:13,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:17:13,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:13,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:13,489 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:13,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 13:17:16,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:17:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:17:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:17,463 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:17:17,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 111 [2021-08-21 13:17:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:18,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288544204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:18,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:18,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:17:18,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470645533] [2021-08-21 13:17:18,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:18,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:18,283 INFO L87 Difference]: Start difference. First operand 1385 states and 4623 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:20,073 INFO L93 Difference]: Finished difference Result 2110 states and 6836 transitions. [2021-08-21 13:17:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:17:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:20,076 INFO L225 Difference]: With dead ends: 2110 [2021-08-21 13:17:20,076 INFO L226 Difference]: Without dead ends: 2095 [2021-08-21 13:17:20,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1797.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:17:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-08-21 13:17:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1382. [2021-08-21 13:17:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1382 states, 1381 states have (on average 3.336712527154236) internal successors, (4608), 1381 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 4608 transitions. [2021-08-21 13:17:20,097 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 4608 transitions. Word has length 26 [2021-08-21 13:17:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:20,098 INFO L470 AbstractCegarLoop]: Abstraction has 1382 states and 4608 transitions. [2021-08-21 13:17:20,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 4608 transitions. [2021-08-21 13:17:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:20,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:20,100 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:20,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:20,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:20,316 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash 659147747, now seen corresponding path program 21 times [2021-08-21 13:17:20,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:20,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083131671] [2021-08-21 13:17:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:20,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:21,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:21,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083131671] [2021-08-21 13:17:21,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083131671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:21,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643573645] [2021-08-21 13:17:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:17:21,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:21,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:21,089 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:21,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 13:17:23,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:17:23,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:23,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:17:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:25,377 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:17:25,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:17:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643573645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:25,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:25,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:17:25,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976843830] [2021-08-21 13:17:25,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:25,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:25,584 INFO L87 Difference]: Start difference. First operand 1382 states and 4608 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:28,142 INFO L93 Difference]: Finished difference Result 1954 states and 6320 transitions. [2021-08-21 13:17:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:17:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:28,145 INFO L225 Difference]: With dead ends: 1954 [2021-08-21 13:17:28,145 INFO L226 Difference]: Without dead ends: 1939 [2021-08-21 13:17:28,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2386.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:17:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-08-21 13:17:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1375. [2021-08-21 13:17:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3333333333333335) internal successors, (4580), 1374 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4580 transitions. [2021-08-21 13:17:28,166 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4580 transitions. Word has length 26 [2021-08-21 13:17:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:28,167 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 4580 transitions. [2021-08-21 13:17:28,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4580 transitions. [2021-08-21 13:17:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:28,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:28,184 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:28,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:28,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:28,405 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -890876741, now seen corresponding path program 22 times [2021-08-21 13:17:28,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:28,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052536714] [2021-08-21 13:17:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:28,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:29,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:29,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052536714] [2021-08-21 13:17:29,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052536714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:29,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806268060] [2021-08-21 13:17:29,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:17:29,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:29,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:29,083 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 13:17:32,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:17:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:17:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:33,300 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:17:33,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:17:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:33,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806268060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:33,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:33,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:17:33,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483416683] [2021-08-21 13:17:33,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:33,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:33,444 INFO L87 Difference]: Start difference. First operand 1375 states and 4580 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:34,080 INFO L93 Difference]: Finished difference Result 1816 states and 5905 transitions. [2021-08-21 13:17:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:17:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:34,083 INFO L225 Difference]: With dead ends: 1816 [2021-08-21 13:17:34,083 INFO L226 Difference]: Without dead ends: 1795 [2021-08-21 13:17:34,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:17:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-08-21 13:17:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1416. [2021-08-21 13:17:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.330035335689046) internal successors, (4712), 1415 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4712 transitions. [2021-08-21 13:17:34,102 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4712 transitions. Word has length 26 [2021-08-21 13:17:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:34,102 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 4712 transitions. [2021-08-21 13:17:34,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4712 transitions. [2021-08-21 13:17:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:34,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:34,104 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:34,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 13:17:34,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 13:17:34,329 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1058685833, now seen corresponding path program 23 times [2021-08-21 13:17:34,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:34,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785708622] [2021-08-21 13:17:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:34,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:34,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:34,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785708622] [2021-08-21 13:17:34,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785708622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:34,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922161205] [2021-08-21 13:17:34,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:17:34,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:34,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:35,000 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:35,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 13:17:38,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:17:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:17:38,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:39,143 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:17:39,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:17:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:39,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922161205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:39,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:39,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:17:39,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977323365] [2021-08-21 13:17:39,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:17:39,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:39,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:17:39,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:17:39,412 INFO L87 Difference]: Start difference. First operand 1416 states and 4712 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:40,232 INFO L93 Difference]: Finished difference Result 1737 states and 5671 transitions. [2021-08-21 13:17:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:17:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:40,235 INFO L225 Difference]: With dead ends: 1737 [2021-08-21 13:17:40,235 INFO L226 Difference]: Without dead ends: 1718 [2021-08-21 13:17:40,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:17:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-08-21 13:17:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1410. [2021-08-21 13:17:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3293115684882895) internal successors, (4691), 1409 states have internal predecessors, (4691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4691 transitions. [2021-08-21 13:17:40,252 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4691 transitions. Word has length 26 [2021-08-21 13:17:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:40,252 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 4691 transitions. [2021-08-21 13:17:40,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4691 transitions. [2021-08-21 13:17:40,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:40,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:40,254 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:40,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:40,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:40,467 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1168765435, now seen corresponding path program 24 times [2021-08-21 13:17:40,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:40,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591444208] [2021-08-21 13:17:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:40,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:41,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:41,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591444208] [2021-08-21 13:17:41,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591444208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:41,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857664235] [2021-08-21 13:17:41,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:17:41,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:41,109 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:41,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 13:17:44,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:17:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:17:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:17:45,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:17:45,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 87 [2021-08-21 13:17:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:45,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857664235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:45,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:45,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:17:45,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097630479] [2021-08-21 13:17:45,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:45,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:45,733 INFO L87 Difference]: Start difference. First operand 1410 states and 4691 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:47,264 INFO L93 Difference]: Finished difference Result 2107 states and 6750 transitions. [2021-08-21 13:17:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:17:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:47,268 INFO L225 Difference]: With dead ends: 2107 [2021-08-21 13:17:47,268 INFO L226 Difference]: Without dead ends: 2072 [2021-08-21 13:17:47,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1643.9ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:17:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-08-21 13:17:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1436. [2021-08-21 13:17:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.3310104529616726) internal successors, (4780), 1435 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4780 transitions. [2021-08-21 13:17:47,288 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4780 transitions. Word has length 26 [2021-08-21 13:17:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:47,288 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 4780 transitions. [2021-08-21 13:17:47,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4780 transitions. [2021-08-21 13:17:47,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:47,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:47,290 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:47,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:47,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 13:17:47,507 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash -759912385, now seen corresponding path program 25 times [2021-08-21 13:17:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:47,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295388445] [2021-08-21 13:17:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:47,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:48,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:48,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295388445] [2021-08-21 13:17:48,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295388445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:48,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226076978] [2021-08-21 13:17:48,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:17:48,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:48,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:48,290 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 13:17:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:17:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:52,467 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:17:52,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 79 [2021-08-21 13:17:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226076978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:52,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:52,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:17:52,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182254513] [2021-08-21 13:17:52,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:17:52,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:17:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:17:52,832 INFO L87 Difference]: Start difference. First operand 1436 states and 4780 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:53,195 INFO L93 Difference]: Finished difference Result 1511 states and 4971 transitions. [2021-08-21 13:17:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:17:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:53,198 INFO L225 Difference]: With dead ends: 1511 [2021-08-21 13:17:53,198 INFO L226 Difference]: Without dead ends: 1496 [2021-08-21 13:17:53,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-21 13:17:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1442. [2021-08-21 13:17:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3331020124913255) internal successors, (4803), 1441 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4803 transitions. [2021-08-21 13:17:53,214 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4803 transitions. Word has length 26 [2021-08-21 13:17:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:53,214 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 4803 transitions. [2021-08-21 13:17:53,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4803 transitions. [2021-08-21 13:17:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:53,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:53,216 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:53,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:53,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 13:17:53,441 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash 810913215, now seen corresponding path program 26 times [2021-08-21 13:17:53,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:53,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073023999] [2021-08-21 13:17:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:53,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:53,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:53,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073023999] [2021-08-21 13:17:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073023999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:53,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104408693] [2021-08-21 13:17:53,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:17:53,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:53,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:53,948 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:53,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 13:17:57,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:17:57,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:57,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:17:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:58,212 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-21 13:17:58,212 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 112 [2021-08-21 13:17:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:58,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104408693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:58,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:58,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:17:58,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367980387] [2021-08-21 13:17:58,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:58,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:58,885 INFO L87 Difference]: Start difference. First operand 1442 states and 4803 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:59,721 INFO L93 Difference]: Finished difference Result 1909 states and 6217 transitions. [2021-08-21 13:17:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:17:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:59,725 INFO L225 Difference]: With dead ends: 1909 [2021-08-21 13:17:59,725 INFO L226 Difference]: Without dead ends: 1884 [2021-08-21 13:17:59,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 884.7ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:17:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-08-21 13:17:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1449. [2021-08-21 13:17:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.337707182320442) internal successors, (4833), 1448 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4833 transitions. [2021-08-21 13:17:59,744 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4833 transitions. Word has length 26 [2021-08-21 13:17:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:59,745 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 4833 transitions. [2021-08-21 13:17:59,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4833 transitions. [2021-08-21 13:17:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:59,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:59,746 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:59,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:59,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 13:17:59,969 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1293947297, now seen corresponding path program 27 times [2021-08-21 13:17:59,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:59,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355137668] [2021-08-21 13:17:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:59,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:00,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:00,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355137668] [2021-08-21 13:18:00,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355137668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:00,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505148917] [2021-08-21 13:18:00,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:18:00,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:00,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:00,705 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:00,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 13:18:04,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:18:04,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:04,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:18:04,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:05,208 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:18:05,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:18:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:05,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505148917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:05,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:05,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:18:05,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450010678] [2021-08-21 13:18:05,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:05,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:05,477 INFO L87 Difference]: Start difference. First operand 1449 states and 4833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:06,410 INFO L93 Difference]: Finished difference Result 1822 states and 5979 transitions. [2021-08-21 13:18:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:18:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:06,413 INFO L225 Difference]: With dead ends: 1822 [2021-08-21 13:18:06,413 INFO L226 Difference]: Without dead ends: 1807 [2021-08-21 13:18:06,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1143.2ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:18:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-08-21 13:18:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1460. [2021-08-21 13:18:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.337902673063742) internal successors, (4870), 1459 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4870 transitions. [2021-08-21 13:18:06,432 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4870 transitions. Word has length 26 [2021-08-21 13:18:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:06,432 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 4870 transitions. [2021-08-21 13:18:06,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4870 transitions. [2021-08-21 13:18:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:06,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:06,434 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:06,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:06,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 13:18:06,657 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1383487219, now seen corresponding path program 28 times [2021-08-21 13:18:06,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:06,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367470280] [2021-08-21 13:18:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:06,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:07,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:07,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367470280] [2021-08-21 13:18:07,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367470280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:07,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370682205] [2021-08-21 13:18:07,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:18:07,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:07,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:07,737 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:07,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 13:18:11,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:18:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:18:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:12,122 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:18:12,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 95 [2021-08-21 13:18:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370682205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:12,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:12,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:18:12,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968570122] [2021-08-21 13:18:12,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:12,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:12,701 INFO L87 Difference]: Start difference. First operand 1460 states and 4870 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:14,133 INFO L93 Difference]: Finished difference Result 2099 states and 6753 transitions. [2021-08-21 13:18:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:18:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:14,137 INFO L225 Difference]: With dead ends: 2099 [2021-08-21 13:18:14,137 INFO L226 Difference]: Without dead ends: 2080 [2021-08-21 13:18:14,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1555.2ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:18:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-08-21 13:18:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1461. [2021-08-21 13:18:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.341095890410959) internal successors, (4878), 1460 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4878 transitions. [2021-08-21 13:18:14,158 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4878 transitions. Word has length 26 [2021-08-21 13:18:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:14,159 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4878 transitions. [2021-08-21 13:18:14,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4878 transitions. [2021-08-21 13:18:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:14,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:14,161 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:14,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:14,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:14,377 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash -306455685, now seen corresponding path program 29 times [2021-08-21 13:18:14,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:14,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976773998] [2021-08-21 13:18:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:14,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:15,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:15,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976773998] [2021-08-21 13:18:15,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976773998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:15,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501284012] [2021-08-21 13:18:15,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:18:15,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:15,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:15,131 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:15,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 13:18:19,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:18:19,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:18:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:19,793 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-21 13:18:19,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 179 treesize of output 109 [2021-08-21 13:18:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501284012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:20,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:20,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:18:20,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398930684] [2021-08-21 13:18:20,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:18:20,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:18:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:18:20,442 INFO L87 Difference]: Start difference. First operand 1461 states and 4878 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:21,940 INFO L93 Difference]: Finished difference Result 1971 states and 6443 transitions. [2021-08-21 13:18:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:18:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:21,944 INFO L225 Difference]: With dead ends: 1971 [2021-08-21 13:18:21,944 INFO L226 Difference]: Without dead ends: 1946 [2021-08-21 13:18:21,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1359.8ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:18:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-08-21 13:18:21,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1461. [2021-08-21 13:18:21,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.341095890410959) internal successors, (4878), 1460 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4878 transitions. [2021-08-21 13:18:21,964 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4878 transitions. Word has length 26 [2021-08-21 13:18:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:21,964 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4878 transitions. [2021-08-21 13:18:21,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4878 transitions. [2021-08-21 13:18:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:21,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:21,966 INFO L512 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] [2021-08-21 13:18:21,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:22,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:22,193 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1067313083, now seen corresponding path program 42 times [2021-08-21 13:18:22,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:22,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438641493] [2021-08-21 13:18:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:22,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:23,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:23,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438641493] [2021-08-21 13:18:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438641493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:23,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091954448] [2021-08-21 13:18:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:18:23,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:23,173 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:23,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 13:18:26,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:18:26,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:18:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:27,910 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:18:27,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 99 [2021-08-21 13:18:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:28,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091954448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:28,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:28,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:18:28,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468820256] [2021-08-21 13:18:28,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:18:28,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:18:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:18:28,089 INFO L87 Difference]: Start difference. First operand 1461 states and 4878 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:29,208 INFO L93 Difference]: Finished difference Result 1897 states and 6170 transitions. [2021-08-21 13:18:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:18:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:29,211 INFO L225 Difference]: With dead ends: 1897 [2021-08-21 13:18:29,211 INFO L226 Difference]: Without dead ends: 1871 [2021-08-21 13:18:29,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1367.3ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:18:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-08-21 13:18:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1465. [2021-08-21 13:18:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.33879781420765) internal successors, (4888), 1464 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4888 transitions. [2021-08-21 13:18:29,230 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4888 transitions. Word has length 26 [2021-08-21 13:18:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:29,230 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 4888 transitions. [2021-08-21 13:18:29,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4888 transitions. [2021-08-21 13:18:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:29,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:29,232 INFO L512 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] [2021-08-21 13:18:29,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:29,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:29,457 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:29,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2135187647, now seen corresponding path program 43 times [2021-08-21 13:18:29,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:29,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430380802] [2021-08-21 13:18:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:29,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:29,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:29,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430380802] [2021-08-21 13:18:29,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430380802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:29,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061910423] [2021-08-21 13:18:29,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:18:29,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:29,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:29,987 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:29,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 13:18:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:18:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:34,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:18:34,907 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:18:34,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 115 [2021-08-21 13:18:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:35,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061910423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:35,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:35,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:18:35,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981740646] [2021-08-21 13:18:35,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:18:35,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:35,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:18:35,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:18:35,187 INFO L87 Difference]: Start difference. First operand 1465 states and 4888 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:37,211 INFO L93 Difference]: Finished difference Result 2072 states and 6739 transitions. [2021-08-21 13:18:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:18:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:37,215 INFO L225 Difference]: With dead ends: 2072 [2021-08-21 13:18:37,215 INFO L226 Difference]: Without dead ends: 2057 [2021-08-21 13:18:37,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1955.6ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:18:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-08-21 13:18:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1465. [2021-08-21 13:18:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.33879781420765) internal successors, (4888), 1464 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4888 transitions. [2021-08-21 13:18:37,235 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4888 transitions. Word has length 26 [2021-08-21 13:18:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:37,235 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 4888 transitions. [2021-08-21 13:18:37,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4888 transitions. [2021-08-21 13:18:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:37,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:37,237 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:37,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:37,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 13:18:37,461 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1546812223, now seen corresponding path program 30 times [2021-08-21 13:18:37,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:37,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082221851] [2021-08-21 13:18:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:37,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:38,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:38,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082221851] [2021-08-21 13:18:38,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082221851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:38,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436607085] [2021-08-21 13:18:38,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:18:38,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:38,432 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:38,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 13:18:42,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:18:42,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 13:18:42,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:43,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:18:43,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 103 [2021-08-21 13:18:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436607085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:45,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:18:45,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058462620] [2021-08-21 13:18:45,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:18:45,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:18:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:18:45,004 INFO L87 Difference]: Start difference. First operand 1465 states and 4888 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:49,069 INFO L93 Difference]: Finished difference Result 2343 states and 7385 transitions. [2021-08-21 13:18:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:18:49,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:49,074 INFO L225 Difference]: With dead ends: 2343 [2021-08-21 13:18:49,074 INFO L226 Difference]: Without dead ends: 2309 [2021-08-21 13:18:49,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 4056.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1869, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:18:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-08-21 13:18:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1485. [2021-08-21 13:18:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.3470350404312668) internal successors, (4967), 1484 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4967 transitions. [2021-08-21 13:18:49,097 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4967 transitions. Word has length 26 [2021-08-21 13:18:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:49,097 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 4967 transitions. [2021-08-21 13:18:49,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4967 transitions. [2021-08-21 13:18:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:49,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:49,099 INFO L512 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] [2021-08-21 13:18:49,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:49,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:49,313 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1197773509, now seen corresponding path program 44 times [2021-08-21 13:18:49,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:49,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383380383] [2021-08-21 13:18:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:49,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:49,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:49,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383380383] [2021-08-21 13:18:49,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383380383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:49,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286054449] [2021-08-21 13:18:49,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:18:49,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:49,857 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:49,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 13:18:54,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:18:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:54,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 13:18:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:18:55,434 INFO L354 Elim1Store]: treesize reduction 22, result has 56.9 percent of original size [2021-08-21 13:18:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 139 [2021-08-21 13:18:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:56,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286054449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:56,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:56,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:18:56,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840066038] [2021-08-21 13:18:56,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:18:56,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:56,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:18:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:18:56,136 INFO L87 Difference]: Start difference. First operand 1485 states and 4967 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:59,327 INFO L93 Difference]: Finished difference Result 2444 states and 7693 transitions. [2021-08-21 13:18:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:18:59,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:59,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:59,331 INFO L225 Difference]: With dead ends: 2444 [2021-08-21 13:18:59,331 INFO L226 Difference]: Without dead ends: 2400 [2021-08-21 13:18:59,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 2954.5ms TimeCoverageRelationStatistics Valid=511, Invalid=2569, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:18:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-08-21 13:18:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1485. [2021-08-21 13:18:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.3470350404312668) internal successors, (4967), 1484 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4967 transitions. [2021-08-21 13:18:59,353 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4967 transitions. Word has length 26 [2021-08-21 13:18:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:59,353 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 4967 transitions. [2021-08-21 13:18:59,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4967 transitions. [2021-08-21 13:18:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:59,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:59,355 INFO L512 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] [2021-08-21 13:18:59,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 13:18:59,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:59,581 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2120874943, now seen corresponding path program 45 times [2021-08-21 13:18:59,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:59,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707188929] [2021-08-21 13:18:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:59,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:00,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:00,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707188929] [2021-08-21 13:19:00,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707188929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:00,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965107560] [2021-08-21 13:19:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:19:00,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:00,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:00,031 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:00,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 13:19:04,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:19:04,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:04,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 13:19:04,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:05,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:19:05,732 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-08-21 13:19:05,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 159 treesize of output 145 [2021-08-21 13:19:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:11,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965107560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:11,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:11,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 13:19:11,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745339190] [2021-08-21 13:19:11,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:19:11,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:11,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:19:11,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:19:11,077 INFO L87 Difference]: Start difference. First operand 1485 states and 4967 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:15,551 INFO L93 Difference]: Finished difference Result 2924 states and 9197 transitions. [2021-08-21 13:19:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:19:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:15,556 INFO L225 Difference]: With dead ends: 2924 [2021-08-21 13:19:15,556 INFO L226 Difference]: Without dead ends: 2894 [2021-08-21 13:19:15,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 3762.8ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:19:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-08-21 13:19:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 1490. [2021-08-21 13:19:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.3579583613163195) internal successors, (5000), 1489 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5000 transitions. [2021-08-21 13:19:15,581 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5000 transitions. Word has length 26 [2021-08-21 13:19:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 5000 transitions. [2021-08-21 13:19:15,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5000 transitions. [2021-08-21 13:19:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:15,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:15,583 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:15,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:15,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-21 13:19:15,808 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:15,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:15,808 INFO L82 PathProgramCache]: Analyzing trace with hash 370619947, now seen corresponding path program 31 times [2021-08-21 13:19:15,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:15,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491007931] [2021-08-21 13:19:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:15,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:17,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:17,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491007931] [2021-08-21 13:19:17,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491007931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:17,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841864676] [2021-08-21 13:19:17,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:19:17,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:17,347 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:17,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 13:19:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:21,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:19:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:23,332 INFO L354 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-08-21 13:19:23,333 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 112 [2021-08-21 13:19:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:23,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841864676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:23,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:23,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:19:23,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722455520] [2021-08-21 13:19:23,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:19:23,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:19:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:19:23,604 INFO L87 Difference]: Start difference. First operand 1490 states and 5000 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:26,194 INFO L93 Difference]: Finished difference Result 2069 states and 6676 transitions. [2021-08-21 13:19:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:19:26,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:26,197 INFO L225 Difference]: With dead ends: 2069 [2021-08-21 13:19:26,198 INFO L226 Difference]: Without dead ends: 2054 [2021-08-21 13:19:26,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2491.3ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:19:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-08-21 13:19:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1496. [2021-08-21 13:19:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3605351170568563) internal successors, (5024), 1495 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5024 transitions. [2021-08-21 13:19:26,218 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5024 transitions. Word has length 26 [2021-08-21 13:19:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:26,218 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 5024 transitions. [2021-08-21 13:19:26,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5024 transitions. [2021-08-21 13:19:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:26,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:26,220 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:26,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:26,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 13:19:26,433 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1246912833, now seen corresponding path program 32 times [2021-08-21 13:19:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:26,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111341683] [2021-08-21 13:19:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:26,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:27,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:27,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111341683] [2021-08-21 13:19:27,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111341683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:27,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182758697] [2021-08-21 13:19:27,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:19:27,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:27,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:27,448 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:27,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 13:19:31,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:19:31,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:31,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:19:31,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:32,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:19:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 105 [2021-08-21 13:19:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:33,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182758697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:33,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:33,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:19:33,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877857094] [2021-08-21 13:19:33,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:19:33,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:33,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:19:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:19:33,572 INFO L87 Difference]: Start difference. First operand 1496 states and 5024 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:38,681 INFO L93 Difference]: Finished difference Result 2627 states and 8240 transitions. [2021-08-21 13:19:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:19:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:38,687 INFO L225 Difference]: With dead ends: 2627 [2021-08-21 13:19:38,687 INFO L226 Difference]: Without dead ends: 2589 [2021-08-21 13:19:38,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 4881.6ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:19:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-08-21 13:19:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1491. [2021-08-21 13:19:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 3.357718120805369) internal successors, (5003), 1490 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 5003 transitions. [2021-08-21 13:19:38,717 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 5003 transitions. Word has length 26 [2021-08-21 13:19:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:38,718 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 5003 transitions. [2021-08-21 13:19:38,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 5003 transitions. [2021-08-21 13:19:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:38,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:38,720 INFO L512 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] [2021-08-21 13:19:38,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:38,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:38,937 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash -971779985, now seen corresponding path program 46 times [2021-08-21 13:19:38,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:38,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189242591] [2021-08-21 13:19:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:38,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:39,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:39,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189242591] [2021-08-21 13:19:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189242591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:39,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146833225] [2021-08-21 13:19:39,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:19:39,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:39,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:39,520 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:39,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 13:19:44,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:19:44,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 13:19:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:45,215 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:19:45,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 99 [2021-08-21 13:19:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:45,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146833225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:45,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:45,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 13:19:45,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484173327] [2021-08-21 13:19:45,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:19:45,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:19:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:19:45,484 INFO L87 Difference]: Start difference. First operand 1491 states and 5003 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:48,135 INFO L93 Difference]: Finished difference Result 2921 states and 9316 transitions. [2021-08-21 13:19:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:19:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:48,141 INFO L225 Difference]: With dead ends: 2921 [2021-08-21 13:19:48,141 INFO L226 Difference]: Without dead ends: 2885 [2021-08-21 13:19:48,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2502.6ms TimeCoverageRelationStatistics Valid=430, Invalid=1922, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:19:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-08-21 13:19:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 1530. [2021-08-21 13:19:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.3754087638979726) internal successors, (5161), 1529 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5161 transitions. [2021-08-21 13:19:48,169 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5161 transitions. Word has length 26 [2021-08-21 13:19:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:48,169 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 5161 transitions. [2021-08-21 13:19:48,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5161 transitions. [2021-08-21 13:19:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:48,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:48,171 INFO L512 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] [2021-08-21 13:19:48,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:48,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:48,397 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash 861868667, now seen corresponding path program 47 times [2021-08-21 13:19:48,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:48,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580741598] [2021-08-21 13:19:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:48,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:48,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:48,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580741598] [2021-08-21 13:19:48,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580741598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:48,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786707613] [2021-08-21 13:19:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:19:48,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:48,876 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:48,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 13:19:53,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:19:53,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 13:19:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:54,311 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:19:54,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 117 [2021-08-21 13:19:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:55,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786707613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:55,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:55,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 13:19:55,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345669299] [2021-08-21 13:19:55,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:19:55,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:19:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:19:55,234 INFO L87 Difference]: Start difference. First operand 1530 states and 5161 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:58,209 INFO L93 Difference]: Finished difference Result 2867 states and 9138 transitions. [2021-08-21 13:19:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:19:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:58,215 INFO L225 Difference]: With dead ends: 2867 [2021-08-21 13:19:58,215 INFO L226 Difference]: Without dead ends: 2819 [2021-08-21 13:19:58,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2738.3ms TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:19:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-08-21 13:19:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 1542. [2021-08-21 13:19:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 3.3776768332251783) internal successors, (5205), 1541 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 5205 transitions. [2021-08-21 13:19:58,243 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 5205 transitions. Word has length 26 [2021-08-21 13:19:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:58,243 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 5205 transitions. [2021-08-21 13:19:58,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 5205 transitions. [2021-08-21 13:19:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:58,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:58,246 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:58,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:58,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:58,461 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash -53691289, now seen corresponding path program 33 times [2021-08-21 13:19:58,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:58,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460027812] [2021-08-21 13:19:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:58,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:59,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:59,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460027812] [2021-08-21 13:19:59,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460027812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:59,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865170190] [2021-08-21 13:19:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:19:59,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:59,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:59,227 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:59,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 13:20:04,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:20:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:20:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:05,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:20:05,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 117 [2021-08-21 13:20:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865170190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:07,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:07,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-08-21 13:20:07,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604593737] [2021-08-21 13:20:07,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:20:07,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:20:07,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:20:07,211 INFO L87 Difference]: Start difference. First operand 1542 states and 5205 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:11,231 INFO L93 Difference]: Finished difference Result 2186 states and 7084 transitions. [2021-08-21 13:20:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:20:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:20:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:11,235 INFO L225 Difference]: With dead ends: 2186 [2021-08-21 13:20:11,235 INFO L226 Difference]: Without dead ends: 2156 [2021-08-21 13:20:11,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3535.7ms TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:20:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-08-21 13:20:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1551. [2021-08-21 13:20:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 3.3761290322580644) internal successors, (5233), 1550 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 5233 transitions. [2021-08-21 13:20:11,257 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 5233 transitions. Word has length 26 [2021-08-21 13:20:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:11,257 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 5233 transitions. [2021-08-21 13:20:11,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 5233 transitions. [2021-08-21 13:20:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:11,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:11,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:11,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:11,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:11,473 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -595104321, now seen corresponding path program 34 times [2021-08-21 13:20:11,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:11,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463281949] [2021-08-21 13:20:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:11,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:12,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:12,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463281949] [2021-08-21 13:20:12,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463281949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:12,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072796722] [2021-08-21 13:20:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:20:12,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:12,077 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:12,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 13:20:17,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:20:17,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:17,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:20:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:17,918 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:20:17,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2021-08-21 13:20:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:18,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072796722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:18,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:18,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:20:18,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186562345] [2021-08-21 13:20:18,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:20:18,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:20:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:20:18,534 INFO L87 Difference]: Start difference. First operand 1551 states and 5233 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:20,196 INFO L93 Difference]: Finished difference Result 2117 states and 6980 transitions. [2021-08-21 13:20:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:20:20,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:20:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:20,200 INFO L225 Difference]: With dead ends: 2117 [2021-08-21 13:20:20,200 INFO L226 Difference]: Without dead ends: 2092 [2021-08-21 13:20:20,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1505.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:20:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-08-21 13:20:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1551. [2021-08-21 13:20:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 3.3761290322580644) internal successors, (5233), 1550 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 5233 transitions. [2021-08-21 13:20:20,221 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 5233 transitions. Word has length 26 [2021-08-21 13:20:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:20,221 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 5233 transitions. [2021-08-21 13:20:20,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 5233 transitions. [2021-08-21 13:20:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:20,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:20,224 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:20,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:20,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:20,437 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash -458570249, now seen corresponding path program 35 times [2021-08-21 13:20:20,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:20,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452303209] [2021-08-21 13:20:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:20,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:21,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:21,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452303209] [2021-08-21 13:20:21,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452303209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:21,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684759986] [2021-08-21 13:20:21,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:20:21,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:21,236 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:21,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 13:20:26,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:20:26,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:26,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 13:20:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:27,481 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:20:27,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 111 [2021-08-21 13:20:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:28,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684759986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:28,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:28,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:20:28,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724963004] [2021-08-21 13:20:28,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:28,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:28,420 INFO L87 Difference]: Start difference. First operand 1551 states and 5233 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:30,987 INFO L93 Difference]: Finished difference Result 2337 states and 7630 transitions. [2021-08-21 13:20:30,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:20:30,987 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:20:30,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:30,991 INFO L225 Difference]: With dead ends: 2337 [2021-08-21 13:20:30,992 INFO L226 Difference]: Without dead ends: 2303 [2021-08-21 13:20:30,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2448.6ms TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:20:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-08-21 13:20:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1538. [2021-08-21 13:20:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3747560182173064) internal successors, (5187), 1537 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5187 transitions. [2021-08-21 13:20:31,019 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5187 transitions. Word has length 26 [2021-08-21 13:20:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:31,019 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5187 transitions. [2021-08-21 13:20:31,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5187 transitions. [2021-08-21 13:20:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:31,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:31,022 INFO L512 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] [2021-08-21 13:20:31,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:31,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-21 13:20:31,249 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1992303019, now seen corresponding path program 48 times [2021-08-21 13:20:31,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:31,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678515359] [2021-08-21 13:20:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:31,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:31,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:31,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678515359] [2021-08-21 13:20:31,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678515359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:31,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164442072] [2021-08-21 13:20:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:20:31,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:31,829 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:31,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 13:20:36,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:20:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:20:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:38,029 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:20:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 99 [2021-08-21 13:20:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:38,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164442072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:38,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:38,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:20:38,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815730777] [2021-08-21 13:20:38,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:38,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:38,244 INFO L87 Difference]: Start difference. First operand 1538 states and 5187 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:39,980 INFO L93 Difference]: Finished difference Result 1992 states and 6529 transitions. [2021-08-21 13:20:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:20:39,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:20:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:39,984 INFO L225 Difference]: With dead ends: 1992 [2021-08-21 13:20:39,984 INFO L226 Difference]: Without dead ends: 1970 [2021-08-21 13:20:39,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1748.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:20:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-08-21 13:20:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1529. [2021-08-21 13:20:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.380235602094241) internal successors, (5165), 1528 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5165 transitions. [2021-08-21 13:20:40,005 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5165 transitions. Word has length 26 [2021-08-21 13:20:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:40,005 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5165 transitions. [2021-08-21 13:20:40,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5165 transitions. [2021-08-21 13:20:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:40,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:40,008 INFO L512 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] [2021-08-21 13:20:40,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:40,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:40,230 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1066809153, now seen corresponding path program 49 times [2021-08-21 13:20:40,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:40,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496361577] [2021-08-21 13:20:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:40,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:40,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:40,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496361577] [2021-08-21 13:20:40,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496361577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:40,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450559654] [2021-08-21 13:20:40,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:20:40,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:40,718 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:40,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 13:20:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:20:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:47,218 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:20:47,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 99 [2021-08-21 13:20:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:47,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450559654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:47,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:47,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:20:47,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945546546] [2021-08-21 13:20:47,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:47,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:47,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:47,514 INFO L87 Difference]: Start difference. First operand 1529 states and 5165 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:50,059 INFO L93 Difference]: Finished difference Result 2174 states and 7127 transitions. [2021-08-21 13:20:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:20:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:20:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:50,064 INFO L225 Difference]: With dead ends: 2174 [2021-08-21 13:20:50,064 INFO L226 Difference]: Without dead ends: 2159 [2021-08-21 13:20:50,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2330.9ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:20:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2021-08-21 13:20:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 1529. [2021-08-21 13:20:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.380235602094241) internal successors, (5165), 1528 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5165 transitions. [2021-08-21 13:20:50,085 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5165 transitions. Word has length 26 [2021-08-21 13:20:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:50,085 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5165 transitions. [2021-08-21 13:20:50,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5165 transitions. [2021-08-21 13:20:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:50,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:50,087 INFO L512 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] [2021-08-21 13:20:50,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:50,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:50,313 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:50,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2050253603, now seen corresponding path program 50 times [2021-08-21 13:20:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:50,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473448553] [2021-08-21 13:20:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:50,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:50,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:50,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473448553] [2021-08-21 13:20:50,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473448553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:50,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167935209] [2021-08-21 13:20:50,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:50,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:50,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:50,906 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:50,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 13:20:56,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:56,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:20:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:20:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:20:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:20:57,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:20:57,352 INFO L388 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 159 treesize of output 131 [2021-08-21 13:20:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:57,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167935209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:57,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:57,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-21 13:20:57,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707919748] [2021-08-21 13:20:57,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:20:57,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:20:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:20:57,953 INFO L87 Difference]: Start difference. First operand 1529 states and 5165 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:04,864 INFO L93 Difference]: Finished difference Result 2957 states and 9344 transitions. [2021-08-21 13:21:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-21 13:21:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:21:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:04,870 INFO L225 Difference]: With dead ends: 2957 [2021-08-21 13:21:04,870 INFO L226 Difference]: Without dead ends: 2910 [2021-08-21 13:21:04,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 6265.4ms TimeCoverageRelationStatistics Valid=1241, Invalid=6949, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 13:21:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-08-21 13:21:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 1546. [2021-08-21 13:21:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 3.373462783171521) internal successors, (5212), 1545 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5212 transitions. [2021-08-21 13:21:04,897 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5212 transitions. Word has length 26 [2021-08-21 13:21:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:04,897 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 5212 transitions. [2021-08-21 13:21:04,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5212 transitions. [2021-08-21 13:21:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:04,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:04,900 INFO L512 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] [2021-08-21 13:21:04,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:05,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:05,102 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:05,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash 504016447, now seen corresponding path program 51 times [2021-08-21 13:21:05,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:05,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766921527] [2021-08-21 13:21:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:05,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:05,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:05,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766921527] [2021-08-21 13:21:05,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766921527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:05,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865316681] [2021-08-21 13:21:05,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:05,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:05,615 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:05,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 13:21:11,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:21:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:21:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:21:11,867 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 13:21:11,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 147 [2021-08-21 13:21:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:13,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865316681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:13,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:13,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-21 13:21:13,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225640706] [2021-08-21 13:21:13,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:21:13,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:21:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:21:13,105 INFO L87 Difference]: Start difference. First operand 1546 states and 5212 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:15,482 INFO L93 Difference]: Finished difference Result 2090 states and 6760 transitions. [2021-08-21 13:21:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:21:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:21:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:15,486 INFO L225 Difference]: With dead ends: 2090 [2021-08-21 13:21:15,486 INFO L226 Difference]: Without dead ends: 2060 [2021-08-21 13:21:15,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2310.4ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:21:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-08-21 13:21:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1552. [2021-08-21 13:21:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.377820760799484) internal successors, (5239), 1551 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5239 transitions. [2021-08-21 13:21:15,534 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5239 transitions. Word has length 26 [2021-08-21 13:21:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5239 transitions. [2021-08-21 13:21:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5239 transitions. [2021-08-21 13:21:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:15,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:15,536 INFO L512 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] [2021-08-21 13:21:15,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:15,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:15,762 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash -830378237, now seen corresponding path program 52 times [2021-08-21 13:21:15,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:15,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818274722] [2021-08-21 13:21:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:15,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:16,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:16,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818274722] [2021-08-21 13:21:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818274722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:16,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468688310] [2021-08-21 13:21:16,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:16,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:16,353 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:16,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 13:21:21,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:21,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:21,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:21:21,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:22,984 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:21:22,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 145 treesize of output 99 [2021-08-21 13:21:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:23,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468688310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:23,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:23,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:21:23,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796903876] [2021-08-21 13:21:23,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:21:23,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:21:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:21:23,180 INFO L87 Difference]: Start difference. First operand 1552 states and 5239 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:25,725 INFO L93 Difference]: Finished difference Result 2092 states and 6859 transitions. [2021-08-21 13:21:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:21:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:21:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:25,730 INFO L225 Difference]: With dead ends: 2092 [2021-08-21 13:21:25,730 INFO L226 Difference]: Without dead ends: 2077 [2021-08-21 13:21:25,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 2233.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:21:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2021-08-21 13:21:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1550. [2021-08-21 13:21:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.377663008392511) internal successors, (5232), 1549 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5232 transitions. [2021-08-21 13:21:25,755 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5232 transitions. Word has length 26 [2021-08-21 13:21:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:25,755 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5232 transitions. [2021-08-21 13:21:25,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5232 transitions. [2021-08-21 13:21:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:25,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:25,757 INFO L512 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] [2021-08-21 13:21:25,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:25,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:25,965 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1239012221, now seen corresponding path program 53 times [2021-08-21 13:21:25,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:25,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875930826] [2021-08-21 13:21:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:25,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:26,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875930826] [2021-08-21 13:21:26,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875930826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:26,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027287599] [2021-08-21 13:21:26,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:26,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:26,453 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:26,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 13:21:32,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:21:32,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 13:21:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:33,188 INFO L354 Elim1Store]: treesize reduction 26, result has 52.7 percent of original size [2021-08-21 13:21:33,188 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 269 treesize of output 173 [2021-08-21 13:21:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027287599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:34,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:34,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-21 13:21:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642173001] [2021-08-21 13:21:34,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:21:34,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:21:34,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:21:34,563 INFO L87 Difference]: Start difference. First operand 1550 states and 5232 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:37,598 INFO L93 Difference]: Finished difference Result 1770 states and 5834 transitions. [2021-08-21 13:21:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:21:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:21:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:37,601 INFO L225 Difference]: With dead ends: 1770 [2021-08-21 13:21:37,601 INFO L226 Difference]: Without dead ends: 1755 [2021-08-21 13:21:37,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2596.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:21:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-08-21 13:21:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1552. [2021-08-21 13:21:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.377820760799484) internal successors, (5239), 1551 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5239 transitions. [2021-08-21 13:21:37,621 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5239 transitions. Word has length 26 [2021-08-21 13:21:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:37,621 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5239 transitions. [2021-08-21 13:21:37,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5239 transitions. [2021-08-21 13:21:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:37,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:37,623 INFO L512 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] [2021-08-21 13:21:37,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:37,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-21 13:21:37,845 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash -471125125, now seen corresponding path program 54 times [2021-08-21 13:21:37,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:37,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203707392] [2021-08-21 13:21:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:37,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:38,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:38,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203707392] [2021-08-21 13:21:38,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203707392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:38,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842920392] [2021-08-21 13:21:38,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:38,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:38,298 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:38,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 13:21:44,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:21:44,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 13:21:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:21:44,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:21:44,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:21:44,927 INFO L388 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 139 treesize of output 113 [2021-08-21 13:21:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:45,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842920392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:45,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:45,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-21 13:21:45,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809567163] [2021-08-21 13:21:45,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:21:45,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:21:45,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:21:45,718 INFO L87 Difference]: Start difference. First operand 1552 states and 5239 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:49,316 INFO L93 Difference]: Finished difference Result 2312 states and 7335 transitions. [2021-08-21 13:21:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:21:49,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:21:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:49,320 INFO L225 Difference]: With dead ends: 2312 [2021-08-21 13:21:49,320 INFO L226 Difference]: Without dead ends: 2282 [2021-08-21 13:21:49,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 3332.6ms TimeCoverageRelationStatistics Valid=683, Invalid=2287, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:21:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-08-21 13:21:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1560. [2021-08-21 13:21:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.375881975625401) internal successors, (5263), 1559 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5263 transitions. [2021-08-21 13:21:49,343 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5263 transitions. Word has length 26 [2021-08-21 13:21:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:49,343 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5263 transitions. [2021-08-21 13:21:49,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5263 transitions. [2021-08-21 13:21:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:49,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:49,346 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:49,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:49,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:49,573 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:49,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2072067939, now seen corresponding path program 36 times [2021-08-21 13:21:49,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:49,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203385890] [2021-08-21 13:21:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:49,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:50,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:50,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203385890] [2021-08-21 13:21:50,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203385890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:50,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487078026] [2021-08-21 13:21:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:50,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:50,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:50,125 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:50,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 13:21:56,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:21:56,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:56,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:21:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:57,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:21:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 103 [2021-08-21 13:21:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487078026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:57,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:21:57,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051753242] [2021-08-21 13:21:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:21:57,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:21:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:21:57,871 INFO L87 Difference]: Start difference. First operand 1560 states and 5263 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:01,077 INFO L93 Difference]: Finished difference Result 2159 states and 7016 transitions. [2021-08-21 13:22:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:22:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:01,081 INFO L225 Difference]: With dead ends: 2159 [2021-08-21 13:22:01,081 INFO L226 Difference]: Without dead ends: 2129 [2021-08-21 13:22:01,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2882.0ms TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:22:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-08-21 13:22:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1571. [2021-08-21 13:22:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.3802547770700637) internal successors, (5307), 1570 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5307 transitions. [2021-08-21 13:22:01,103 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5307 transitions. Word has length 26 [2021-08-21 13:22:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:01,103 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 5307 transitions. [2021-08-21 13:22:01,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5307 transitions. [2021-08-21 13:22:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:01,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:01,106 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:01,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:01,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:01,322 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash -506719261, now seen corresponding path program 37 times [2021-08-21 13:22:01,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:01,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579999048] [2021-08-21 13:22:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:01,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:01,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:01,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579999048] [2021-08-21 13:22:01,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579999048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:01,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373133262] [2021-08-21 13:22:01,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:01,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:01,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:01,695 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:01,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 13:22:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:07,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:22:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:08,576 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:22:08,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:22:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:08,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373133262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:08,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:08,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:08,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295812639] [2021-08-21 13:22:08,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:22:08,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:22:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:22:08,776 INFO L87 Difference]: Start difference. First operand 1571 states and 5307 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:09,807 INFO L93 Difference]: Finished difference Result 1970 states and 6530 transitions. [2021-08-21 13:22:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:22:09,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:09,811 INFO L225 Difference]: With dead ends: 1970 [2021-08-21 13:22:09,811 INFO L226 Difference]: Without dead ends: 1955 [2021-08-21 13:22:09,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1014.8ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-08-21 13:22:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1560. [2021-08-21 13:22:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.3835792174470813) internal successors, (5275), 1559 states have internal predecessors, (5275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5275 transitions. [2021-08-21 13:22:09,832 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5275 transitions. Word has length 26 [2021-08-21 13:22:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:09,832 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5275 transitions. [2021-08-21 13:22:09,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5275 transitions. [2021-08-21 13:22:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:09,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:09,834 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:09,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 13:22:10,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:10,058 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1424908667, now seen corresponding path program 38 times [2021-08-21 13:22:10,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:10,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243409301] [2021-08-21 13:22:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:10,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:10,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:10,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243409301] [2021-08-21 13:22:10,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243409301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:10,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176379869] [2021-08-21 13:22:10,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:10,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:10,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:10,530 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:10,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 13:22:16,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:16,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:22:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:17,282 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:22:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 235 treesize of output 113 [2021-08-21 13:22:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176379869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:17,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:17,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:17,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979473802] [2021-08-21 13:22:17,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:22:17,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:17,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:22:17,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:22:17,519 INFO L87 Difference]: Start difference. First operand 1560 states and 5275 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:18,713 INFO L93 Difference]: Finished difference Result 2232 states and 7328 transitions. [2021-08-21 13:22:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:22:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:18,717 INFO L225 Difference]: With dead ends: 2232 [2021-08-21 13:22:18,717 INFO L226 Difference]: Without dead ends: 2217 [2021-08-21 13:22:18,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1233.6ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-08-21 13:22:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1552. [2021-08-21 13:22:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.382333978078659) internal successors, (5246), 1551 states have internal predecessors, (5246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5246 transitions. [2021-08-21 13:22:18,740 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5246 transitions. Word has length 26 [2021-08-21 13:22:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:18,740 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5246 transitions. [2021-08-21 13:22:18,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5246 transitions. [2021-08-21 13:22:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:18,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:18,742 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:18,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 13:22:18,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:18,969 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 165902391, now seen corresponding path program 39 times [2021-08-21 13:22:18,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:18,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479859384] [2021-08-21 13:22:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:18,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:19,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:19,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479859384] [2021-08-21 13:22:19,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479859384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:19,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035620716] [2021-08-21 13:22:19,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:19,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:19,496 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:19,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 13:22:25,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:22:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:22:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:26,347 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:22:26,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 128 [2021-08-21 13:22:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:27,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035620716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:27,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:27,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:27,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642876576] [2021-08-21 13:22:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:22:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:22:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:22:27,509 INFO L87 Difference]: Start difference. First operand 1552 states and 5246 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:29,140 INFO L93 Difference]: Finished difference Result 2417 states and 7942 transitions. [2021-08-21 13:22:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:22:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:29,145 INFO L225 Difference]: With dead ends: 2417 [2021-08-21 13:22:29,145 INFO L226 Difference]: Without dead ends: 2402 [2021-08-21 13:22:29,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1527.3ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:22:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-08-21 13:22:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1546. [2021-08-21 13:22:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 3.3779935275080906) internal successors, (5219), 1545 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5219 transitions. [2021-08-21 13:22:29,169 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5219 transitions. Word has length 26 [2021-08-21 13:22:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:29,169 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 5219 transitions. [2021-08-21 13:22:29,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5219 transitions. [2021-08-21 13:22:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:29,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:29,171 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:29,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:29,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:29,385 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1863734655, now seen corresponding path program 40 times [2021-08-21 13:22:29,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:29,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625474763] [2021-08-21 13:22:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:29,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:29,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:29,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625474763] [2021-08-21 13:22:29,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625474763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:29,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466918727] [2021-08-21 13:22:29,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:29,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:29,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:29,908 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:29,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 13:22:36,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:36,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:22:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:37,434 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:22:37,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:22:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:37,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466918727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:37,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:37,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:37,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399894661] [2021-08-21 13:22:37,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:22:37,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:22:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:22:37,618 INFO L87 Difference]: Start difference. First operand 1546 states and 5219 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:38,440 INFO L93 Difference]: Finished difference Result 2026 states and 6672 transitions. [2021-08-21 13:22:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:22:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:38,445 INFO L225 Difference]: With dead ends: 2026 [2021-08-21 13:22:38,445 INFO L226 Difference]: Without dead ends: 2011 [2021-08-21 13:22:38,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 910.3ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:22:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-08-21 13:22:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1523. [2021-08-21 13:22:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.3777923784494086) internal successors, (5141), 1522 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5141 transitions. [2021-08-21 13:22:38,466 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5141 transitions. Word has length 26 [2021-08-21 13:22:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:38,466 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 5141 transitions. [2021-08-21 13:22:38,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5141 transitions. [2021-08-21 13:22:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:38,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:38,468 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:38,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:38,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-21 13:22:38,689 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1994699011, now seen corresponding path program 41 times [2021-08-21 13:22:38,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:38,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634660802] [2021-08-21 13:22:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:38,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:39,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:39,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634660802] [2021-08-21 13:22:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634660802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:39,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925625477] [2021-08-21 13:22:39,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:39,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:39,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:39,236 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:39,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 13:22:45,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:22:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:22:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:46,144 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:22:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 79 [2021-08-21 13:22:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:46,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925625477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:46,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:46,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 13:22:46,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230890372] [2021-08-21 13:22:46,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:46,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:46,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:46,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:46,423 INFO L87 Difference]: Start difference. First operand 1523 states and 5141 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:46,685 INFO L93 Difference]: Finished difference Result 1609 states and 5358 transitions. [2021-08-21 13:22:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:22:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:46,688 INFO L225 Difference]: With dead ends: 1609 [2021-08-21 13:22:46,688 INFO L226 Difference]: Without dead ends: 1594 [2021-08-21 13:22:46,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:22:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-08-21 13:22:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1521. [2021-08-21 13:22:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.3815789473684212) internal successors, (5140), 1520 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5140 transitions. [2021-08-21 13:22:46,728 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5140 transitions. Word has length 26 [2021-08-21 13:22:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:46,728 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 5140 transitions. [2021-08-21 13:22:46,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5140 transitions. [2021-08-21 13:22:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:46,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:46,741 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:46,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:46,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 13:22:46,961 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash -729442685, now seen corresponding path program 42 times [2021-08-21 13:22:46,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:46,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906504446] [2021-08-21 13:22:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:46,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:47,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:47,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906504446] [2021-08-21 13:22:47,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906504446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:47,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039649371] [2021-08-21 13:22:47,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:22:47,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:47,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:47,482 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:47,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 13:22:54,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:22:54,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:54,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:22:54,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:54,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:22:54,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:22:54,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 98 [2021-08-21 13:22:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:55,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039649371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:55,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:55,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:22:55,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682525972] [2021-08-21 13:22:55,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:22:55,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:55,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:22:55,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:22:55,893 INFO L87 Difference]: Start difference. First operand 1521 states and 5140 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:57,410 INFO L93 Difference]: Finished difference Result 2115 states and 6951 transitions. [2021-08-21 13:22:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:22:57,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:57,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:57,414 INFO L225 Difference]: With dead ends: 2115 [2021-08-21 13:22:57,414 INFO L226 Difference]: Without dead ends: 2090 [2021-08-21 13:22:57,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1295.8ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:22:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-08-21 13:22:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1519. [2021-08-21 13:22:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.3814229249011856) internal successors, (5133), 1518 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 5133 transitions. [2021-08-21 13:22:57,438 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 5133 transitions. Word has length 26 [2021-08-21 13:22:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:57,438 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 5133 transitions. [2021-08-21 13:22:57,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 5133 transitions. [2021-08-21 13:22:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:57,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:57,440 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:57,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:57,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:57,653 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1067552615, now seen corresponding path program 43 times [2021-08-21 13:22:57,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:57,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505739816] [2021-08-21 13:22:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:57,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:58,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:58,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505739816] [2021-08-21 13:22:58,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505739816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:58,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455960899] [2021-08-21 13:22:58,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:58,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:58,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:58,501 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:58,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 13:23:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:23:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:05,889 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:23:05,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:23:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:06,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455960899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:06,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:06,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:23:06,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115694954] [2021-08-21 13:23:06,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:23:06,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:23:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:23:06,120 INFO L87 Difference]: Start difference. First operand 1519 states and 5133 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:07,295 INFO L93 Difference]: Finished difference Result 2011 states and 6635 transitions. [2021-08-21 13:23:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:23:07,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:23:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:07,299 INFO L225 Difference]: With dead ends: 2011 [2021-08-21 13:23:07,299 INFO L226 Difference]: Without dead ends: 1996 [2021-08-21 13:23:07,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1269.2ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:23:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-08-21 13:23:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1521. [2021-08-21 13:23:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.3776315789473683) internal successors, (5134), 1520 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5134 transitions. [2021-08-21 13:23:07,319 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5134 transitions. Word has length 26 [2021-08-21 13:23:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 5134 transitions. [2021-08-21 13:23:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5134 transitions. [2021-08-21 13:23:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:07,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:07,322 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:07,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:07,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:07,535 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:07,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1846811585, now seen corresponding path program 44 times [2021-08-21 13:23:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:07,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438116401] [2021-08-21 13:23:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:07,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:08,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:08,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438116401] [2021-08-21 13:23:08,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438116401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:08,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183663553] [2021-08-21 13:23:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:23:08,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:08,106 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:08,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 13:23:14,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:23:15,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:23:15,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 78 [2021-08-21 13:23:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:15,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183663553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:15,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:15,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:23:15,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652267286] [2021-08-21 13:23:15,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:23:15,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:23:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:23:15,903 INFO L87 Difference]: Start difference. First operand 1521 states and 5134 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:16,883 INFO L93 Difference]: Finished difference Result 2088 states and 6877 transitions. [2021-08-21 13:23:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:23:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:23:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:16,887 INFO L225 Difference]: With dead ends: 2088 [2021-08-21 13:23:16,887 INFO L226 Difference]: Without dead ends: 2063 [2021-08-21 13:23:16,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1096.7ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:23:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-08-21 13:23:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1515. [2021-08-21 13:23:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.3751651254953763) internal successors, (5110), 1514 states have internal predecessors, (5110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 5110 transitions. [2021-08-21 13:23:16,944 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 5110 transitions. Word has length 26 [2021-08-21 13:23:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:16,944 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 5110 transitions. [2021-08-21 13:23:16,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 5110 transitions. [2021-08-21 13:23:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:16,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:16,959 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:16,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 13:23:17,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 13:23:17,177 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1710277513, now seen corresponding path program 45 times [2021-08-21 13:23:17,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:17,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347061671] [2021-08-21 13:23:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:17,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:17,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:17,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347061671] [2021-08-21 13:23:17,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347061671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:17,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529890102] [2021-08-21 13:23:17,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:23:17,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:17,784 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:17,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 13:23:24,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:23:24,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:24,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:23:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:25,067 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:23:25,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 111 [2021-08-21 13:23:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:25,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529890102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:25,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:25,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:23:25,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143099090] [2021-08-21 13:23:25,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:23:25,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:23:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:23:25,877 INFO L87 Difference]: Start difference. First operand 1515 states and 5110 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:27,791 INFO L93 Difference]: Finished difference Result 2339 states and 7642 transitions. [2021-08-21 13:23:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:23:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:23:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:27,795 INFO L225 Difference]: With dead ends: 2339 [2021-08-21 13:23:27,795 INFO L226 Difference]: Without dead ends: 2320 [2021-08-21 13:23:27,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1971.2ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:23:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-08-21 13:23:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1496. [2021-08-21 13:23:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.37123745819398) internal successors, (5040), 1495 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5040 transitions. [2021-08-21 13:23:27,820 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5040 transitions. Word has length 26 [2021-08-21 13:23:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:27,820 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 5040 transitions. [2021-08-21 13:23:27,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5040 transitions. [2021-08-21 13:23:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:27,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:27,822 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:27,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:28,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:28,044 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1505561531, now seen corresponding path program 46 times [2021-08-21 13:23:28,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:28,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731468502] [2021-08-21 13:23:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:28,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:28,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:28,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731468502] [2021-08-21 13:23:28,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731468502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:28,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373547316] [2021-08-21 13:23:28,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:23:28,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:28,782 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:28,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 13:23:35,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:23:35,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:35,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:23:35,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:36,457 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:23:36,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 93 [2021-08-21 13:23:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:36,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373547316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:36,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:36,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 13:23:36,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149564503] [2021-08-21 13:23:36,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:23:36,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:36,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:23:36,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:23:36,717 INFO L87 Difference]: Start difference. First operand 1496 states and 5040 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-08-21 13:23:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:37,322 INFO L93 Difference]: Finished difference Result 1990 states and 6562 transitions. [2021-08-21 13:23:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:23:37,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 26 [2021-08-21 13:23:37,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:37,326 INFO L225 Difference]: With dead ends: 1990 [2021-08-21 13:23:37,326 INFO L226 Difference]: Without dead ends: 1975 [2021-08-21 13:23:37,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:23:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-08-21 13:23:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1538. [2021-08-21 13:23:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.364996746909564) internal successors, (5172), 1537 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5172 transitions. [2021-08-21 13:23:37,346 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5172 transitions. Word has length 26 [2021-08-21 13:23:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:37,346 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5172 transitions. [2021-08-21 13:23:37,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-08-21 13:23:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5172 transitions. [2021-08-21 13:23:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:37,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:37,373 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:37,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:37,574 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1337752439, now seen corresponding path program 47 times [2021-08-21 13:23:37,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:37,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250297659] [2021-08-21 13:23:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:37,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:38,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:38,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250297659] [2021-08-21 13:23:38,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250297659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:38,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933978730] [2021-08-21 13:23:38,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:23:38,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:38,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:38,142 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:38,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 13:23:45,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:23:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:23:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:46,138 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:23:46,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 111 [2021-08-21 13:23:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:46,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933978730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:46,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:46,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:23:46,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925516573] [2021-08-21 13:23:46,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:23:46,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:23:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:23:46,471 INFO L87 Difference]: Start difference. First operand 1538 states and 5172 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:47,912 INFO L93 Difference]: Finished difference Result 2290 states and 7456 transitions. [2021-08-21 13:23:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:23:47,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:23:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:47,917 INFO L225 Difference]: With dead ends: 2290 [2021-08-21 13:23:47,917 INFO L226 Difference]: Without dead ends: 2260 [2021-08-21 13:23:47,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1495.0ms TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:23:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-08-21 13:23:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1542. [2021-08-21 13:23:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 3.3679428942245293) internal successors, (5190), 1541 states have internal predecessors, (5190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 5190 transitions. [2021-08-21 13:23:47,940 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 5190 transitions. Word has length 26 [2021-08-21 13:23:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:47,940 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 5190 transitions. [2021-08-21 13:23:47,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 5190 transitions. [2021-08-21 13:23:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:47,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:47,943 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:47,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 13:23:48,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 13:23:48,166 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:48,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1636525887, now seen corresponding path program 48 times [2021-08-21 13:23:48,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:48,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26479981] [2021-08-21 13:23:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:48,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:48,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:48,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26479981] [2021-08-21 13:23:48,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26479981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:48,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498377714] [2021-08-21 13:23:48,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:23:48,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:48,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:48,809 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:48,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 13:23:55,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:23:55,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:23:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:56,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:23:56,436 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-08-21 13:23:56,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 118 [2021-08-21 13:23:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:57,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498377714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:57,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:57,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:23:57,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839493146] [2021-08-21 13:23:57,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:23:57,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:23:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:23:57,019 INFO L87 Difference]: Start difference. First operand 1542 states and 5190 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:57,832 INFO L93 Difference]: Finished difference Result 2056 states and 6796 transitions. [2021-08-21 13:23:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:23:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:23:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:57,835 INFO L225 Difference]: With dead ends: 2056 [2021-08-21 13:23:57,836 INFO L226 Difference]: Without dead ends: 2041 [2021-08-21 13:23:57,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1046.7ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:23:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-08-21 13:23:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1545. [2021-08-21 13:23:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.371761658031088) internal successors, (5206), 1544 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5206 transitions. [2021-08-21 13:23:57,856 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5206 transitions. Word has length 26 [2021-08-21 13:23:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:57,856 INFO L470 AbstractCegarLoop]: Abstraction has 1545 states and 5206 transitions. [2021-08-21 13:23:57,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5206 transitions. [2021-08-21 13:23:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:57,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:57,858 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:57,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:58,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 13:23:58,081 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash -313885377, now seen corresponding path program 49 times [2021-08-21 13:23:58,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:58,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541601614] [2021-08-21 13:23:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:58,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:58,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:58,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541601614] [2021-08-21 13:23:58,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541601614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:58,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166570282] [2021-08-21 13:23:58,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:23:58,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:58,807 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:58,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 13:24:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:05,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:06,810 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:24:06,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 101 [2021-08-21 13:24:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:07,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166570282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:07,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:07,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:24:07,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406945430] [2021-08-21 13:24:07,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:07,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:07,190 INFO L87 Difference]: Start difference. First operand 1545 states and 5206 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:08,135 INFO L93 Difference]: Finished difference Result 2141 states and 7012 transitions. [2021-08-21 13:24:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:24:08,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:24:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:08,139 INFO L225 Difference]: With dead ends: 2141 [2021-08-21 13:24:08,139 INFO L226 Difference]: Without dead ends: 2111 [2021-08-21 13:24:08,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1142.4ms TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:24:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-08-21 13:24:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1563. [2021-08-21 13:24:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.3674775928297054) internal successors, (5260), 1562 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5260 transitions. [2021-08-21 13:24:08,159 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5260 transitions. Word has length 26 [2021-08-21 13:24:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:08,159 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 5260 transitions. [2021-08-21 13:24:08,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5260 transitions. [2021-08-21 13:24:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:08,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:08,161 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:24:08,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 13:24:08,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:08,365 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash 485455907, now seen corresponding path program 50 times [2021-08-21 13:24:08,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:08,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179718597] [2021-08-21 13:24:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:08,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:09,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:09,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179718597] [2021-08-21 13:24:09,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179718597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:09,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606267546] [2021-08-21 13:24:09,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:09,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:09,028 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:09,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 13:24:16,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:16,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:24:16,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:17,133 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-21 13:24:17,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 116 [2021-08-21 13:24:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606267546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:17,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:17,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:24:17,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723537668] [2021-08-21 13:24:17,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:17,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:17,556 INFO L87 Difference]: Start difference. First operand 1563 states and 5260 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:19,044 INFO L93 Difference]: Finished difference Result 2101 states and 6945 transitions. [2021-08-21 13:24:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:24:19,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:24:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:19,047 INFO L225 Difference]: With dead ends: 2101 [2021-08-21 13:24:19,047 INFO L226 Difference]: Without dead ends: 2086 [2021-08-21 13:24:19,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1423.6ms TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:24:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-08-21 13:24:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1581. [2021-08-21 13:24:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.3651898734177217) internal successors, (5317), 1580 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5317 transitions. [2021-08-21 13:24:19,069 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5317 transitions. Word has length 26 [2021-08-21 13:24:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 5317 transitions. [2021-08-21 13:24:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5317 transitions. [2021-08-21 13:24:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:19,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:19,072 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:24:19,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 13:24:19,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:19,297 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1472947519, now seen corresponding path program 51 times [2021-08-21 13:24:19,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:19,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920173579] [2021-08-21 13:24:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:19,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:19,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:19,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920173579] [2021-08-21 13:24:19,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920173579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:19,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412794535] [2021-08-21 13:24:19,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:19,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:19,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:19,873 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:19,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 13:24:26,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:26,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:26,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:24:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:27,561 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:24:27,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2021-08-21 13:24:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:28,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412794535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:28,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:28,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:24:28,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477070828] [2021-08-21 13:24:28,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:24:28,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:24:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:24:28,326 INFO L87 Difference]: Start difference. First operand 1581 states and 5317 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-21 13:24:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:29,068 INFO L93 Difference]: Finished difference Result 2154 states and 7090 transitions. [2021-08-21 13:24:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:24:29,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-08-21 13:24:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:29,071 INFO L225 Difference]: With dead ends: 2154 [2021-08-21 13:24:29,071 INFO L226 Difference]: Without dead ends: 2129 [2021-08-21 13:24:29,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 831.0ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:24:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-08-21 13:24:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1581. [2021-08-21 13:24:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.367721518987342) internal successors, (5321), 1580 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5321 transitions. [2021-08-21 13:24:29,092 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5321 transitions. Word has length 26 [2021-08-21 13:24:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:29,092 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 5321 transitions. [2021-08-21 13:24:29,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-21 13:24:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5321 transitions. [2021-08-21 13:24:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:29,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:29,094 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:24:29,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:29,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 13:24:29,313 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash -337479045, now seen corresponding path program 52 times [2021-08-21 13:24:29,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:29,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127914830] [2021-08-21 13:24:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:29,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:29,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:29,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127914830] [2021-08-21 13:24:29,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127914830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:29,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151662262] [2021-08-21 13:24:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:29,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:29,898 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:29,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 13:24:37,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:24:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:37,937 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:24:37,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2021-08-21 13:24:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151662262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:38,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:38,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:24:38,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711535412] [2021-08-21 13:24:38,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:24:38,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:38,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:24:38,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:24:38,718 INFO L87 Difference]: Start difference. First operand 1581 states and 5321 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-21 13:24:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:39,371 INFO L93 Difference]: Finished difference Result 2090 states and 6915 transitions. [2021-08-21 13:24:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:24:39,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-08-21 13:24:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:39,375 INFO L225 Difference]: With dead ends: 2090 [2021-08-21 13:24:39,375 INFO L226 Difference]: Without dead ends: 2075 [2021-08-21 13:24:39,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 818.5ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-08-21 13:24:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1581. [2021-08-21 13:24:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.367721518987342) internal successors, (5321), 1580 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5321 transitions. [2021-08-21 13:24:39,397 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5321 transitions. Word has length 26 [2021-08-21 13:24:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:39,397 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 5321 transitions. [2021-08-21 13:24:39,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2021-08-21 13:24:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5321 transitions. [2021-08-21 13:24:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:39,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:39,400 INFO L512 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] [2021-08-21 13:24:39,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:39,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 13:24:39,618 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:39,618 INFO L82 PathProgramCache]: Analyzing trace with hash -672170565, now seen corresponding path program 55 times [2021-08-21 13:24:39,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:39,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161480871] [2021-08-21 13:24:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:39,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:40,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:40,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161480871] [2021-08-21 13:24:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161480871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:40,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954904963] [2021-08-21 13:24:40,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:40,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:40,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:40,148 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:40,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 13:24:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:47,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:24:48,840 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:24:48,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 158 treesize of output 106 [2021-08-21 13:24:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:49,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954904963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:49,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:49,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:24:49,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026905998] [2021-08-21 13:24:49,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:24:49,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:24:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:24:49,057 INFO L87 Difference]: Start difference. First operand 1581 states and 5321 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-08-21 13:24:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:49,998 INFO L93 Difference]: Finished difference Result 2133 states and 6759 transitions. [2021-08-21 13:24:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:24:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 26 [2021-08-21 13:24:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:50,002 INFO L225 Difference]: With dead ends: 2133 [2021-08-21 13:24:50,002 INFO L226 Difference]: Without dead ends: 2096 [2021-08-21 13:24:50,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1112.6ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:24:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-08-21 13:24:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1603. [2021-08-21 13:24:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.3670411985018727) internal successors, (5394), 1602 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5394 transitions. [2021-08-21 13:24:50,025 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5394 transitions. Word has length 26 [2021-08-21 13:24:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:50,025 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 5394 transitions. [2021-08-21 13:24:50,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-08-21 13:24:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5394 transitions. [2021-08-21 13:24:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:50,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:50,028 INFO L512 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] [2021-08-21 13:24:50,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 13:24:50,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:50,253 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash 395703999, now seen corresponding path program 56 times [2021-08-21 13:24:50,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:50,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256207331] [2021-08-21 13:24:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:50,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:50,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:50,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256207331] [2021-08-21 13:24:50,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256207331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:50,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78274174] [2021-08-21 13:24:50,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:50,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:50,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:50,687 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:24:50,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 13:24:58,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:58,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:58,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:24:58,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:59,180 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:24:59,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 99 [2021-08-21 13:24:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:59,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78274174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:59,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:59,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:24:59,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454305724] [2021-08-21 13:24:59,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:24:59,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:59,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:24:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:24:59,434 INFO L87 Difference]: Start difference. First operand 1603 states and 5394 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-08-21 13:25:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:00,434 INFO L93 Difference]: Finished difference Result 2085 states and 6820 transitions. [2021-08-21 13:25:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:25:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 26 [2021-08-21 13:25:00,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:00,438 INFO L225 Difference]: With dead ends: 2085 [2021-08-21 13:25:00,438 INFO L226 Difference]: Without dead ends: 2039 [2021-08-21 13:25:00,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1010.7ms TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:25:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-08-21 13:25:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1603. [2021-08-21 13:25:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.363295880149813) internal successors, (5388), 1602 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5388 transitions. [2021-08-21 13:25:00,463 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5388 transitions. Word has length 26 [2021-08-21 13:25:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:00,463 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 5388 transitions. [2021-08-21 13:25:00,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-08-21 13:25:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5388 transitions. [2021-08-21 13:25:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:00,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:00,466 INFO L512 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] [2021-08-21 13:25:00,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:00,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:00,689 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1261562433, now seen corresponding path program 57 times [2021-08-21 13:25:00,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:00,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830015734] [2021-08-21 13:25:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:00,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:01,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:01,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830015734] [2021-08-21 13:25:01,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830015734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:01,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828309159] [2021-08-21 13:25:01,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:01,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:01,281 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:01,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 13:25:08,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:25:08,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:25:08,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:11,642 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-08-21 13:25:11,642 INFO L388 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 147 treesize of output 128 [2021-08-21 13:25:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:12,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828309159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:12,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:12,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:25:12,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852714713] [2021-08-21 13:25:12,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:25:12,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:25:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:25:12,889 INFO L87 Difference]: Start difference. First operand 1603 states and 5388 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2021-08-21 13:25:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:13,620 INFO L93 Difference]: Finished difference Result 1718 states and 5672 transitions. [2021-08-21 13:25:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:25:13,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 26 [2021-08-21 13:25:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:13,677 INFO L225 Difference]: With dead ends: 1718 [2021-08-21 13:25:13,677 INFO L226 Difference]: Without dead ends: 1703 [2021-08-21 13:25:13,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 895.1ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:25:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-08-21 13:25:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1603. [2021-08-21 13:25:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.363295880149813) internal successors, (5388), 1602 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5388 transitions. [2021-08-21 13:25:13,701 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5388 transitions. Word has length 26 [2021-08-21 13:25:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:13,702 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 5388 transitions. [2021-08-21 13:25:13,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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) [2021-08-21 13:25:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5388 transitions. [2021-08-21 13:25:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:13,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:13,704 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:25:13,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:13,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-21 13:25:13,905 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1380129343, now seen corresponding path program 53 times [2021-08-21 13:25:13,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:13,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020291624] [2021-08-21 13:25:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:13,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:14,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:14,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020291624] [2021-08-21 13:25:14,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020291624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:14,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852978262] [2021-08-21 13:25:14,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:14,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:14,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:14,735 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:14,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 13:25:22,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:25:22,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:25:22,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:23,644 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:25:23,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 88 [2021-08-21 13:25:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:23,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852978262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:23,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:23,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:25:23,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398148] [2021-08-21 13:25:23,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:25:23,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:25:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:25:23,901 INFO L87 Difference]: Start difference. First operand 1603 states and 5388 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:25,565 INFO L93 Difference]: Finished difference Result 2176 states and 7083 transitions. [2021-08-21 13:25:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:25:25,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:25,569 INFO L225 Difference]: With dead ends: 2176 [2021-08-21 13:25:25,569 INFO L226 Difference]: Without dead ends: 2161 [2021-08-21 13:25:25,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1726.9ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-08-21 13:25:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1614. [2021-08-21 13:25:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.3639181649101055) internal successors, (5426), 1613 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5426 transitions. [2021-08-21 13:25:25,592 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5426 transitions. Word has length 26 [2021-08-21 13:25:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:25,592 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 5426 transitions. [2021-08-21 13:25:25,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5426 transitions. [2021-08-21 13:25:25,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:25,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:25,594 INFO L512 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] [2021-08-21 13:25:25,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:25,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 13:25:25,821 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1364456389, now seen corresponding path program 58 times [2021-08-21 13:25:25,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:25,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23220811] [2021-08-21 13:25:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:25,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:26,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:26,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23220811] [2021-08-21 13:25:26,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23220811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:26,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601593178] [2021-08-21 13:25:26,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:26,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:26,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:26,247 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:26,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 13:25:34,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:34,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:25:34,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:35,317 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:25:35,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 99 [2021-08-21 13:25:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:35,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601593178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:35,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:35,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 13:25:35,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289276460] [2021-08-21 13:25:35,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:35,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:35,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:35,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:35,454 INFO L87 Difference]: Start difference. First operand 1614 states and 5426 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:37,444 INFO L93 Difference]: Finished difference Result 2126 states and 6786 transitions. [2021-08-21 13:25:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:25:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:37,448 INFO L225 Difference]: With dead ends: 2126 [2021-08-21 13:25:37,448 INFO L226 Difference]: Without dead ends: 2104 [2021-08-21 13:25:37,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1763.1ms TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:25:37,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-08-21 13:25:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1656. [2021-08-21 13:25:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.370996978851964) internal successors, (5579), 1655 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5579 transitions. [2021-08-21 13:25:37,472 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5579 transitions. Word has length 26 [2021-08-21 13:25:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:37,472 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 5579 transitions. [2021-08-21 13:25:37,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5579 transitions. [2021-08-21 13:25:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:37,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:37,474 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:25:37,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 13:25:37,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 13:25:37,701 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1324967577, now seen corresponding path program 54 times [2021-08-21 13:25:37,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:37,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663750544] [2021-08-21 13:25:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:37,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:38,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:38,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663750544] [2021-08-21 13:25:38,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663750544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:38,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462010071] [2021-08-21 13:25:38,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:38,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:38,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:38,381 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:38,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 13:25:46,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:25:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:25:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:48,541 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:25:48,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 243 treesize of output 134 [2021-08-21 13:25:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:50,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462010071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:50,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:50,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:25:50,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356721474] [2021-08-21 13:25:50,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:25:50,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:25:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:25:50,064 INFO L87 Difference]: Start difference. First operand 1656 states and 5579 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:55,785 INFO L93 Difference]: Finished difference Result 2503 states and 8030 transitions. [2021-08-21 13:25:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:25:55,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:55,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:55,790 INFO L225 Difference]: With dead ends: 2503 [2021-08-21 13:25:55,790 INFO L226 Difference]: Without dead ends: 2488 [2021-08-21 13:25:55,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 4935.1ms TimeCoverageRelationStatistics Valid=394, Invalid=2056, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:25:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-08-21 13:25:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1667. [2021-08-21 13:25:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.3751500600240094) internal successors, (5623), 1666 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5623 transitions. [2021-08-21 13:25:55,815 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5623 transitions. Word has length 26 [2021-08-21 13:25:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:55,815 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 5623 transitions. [2021-08-21 13:25:55,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5623 transitions. [2021-08-21 13:25:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:55,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:55,817 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:25:55,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:56,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 13:25:56,028 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1413595713, now seen corresponding path program 55 times [2021-08-21 13:25:56,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:56,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42356909] [2021-08-21 13:25:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:56,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:25:56,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:56,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42356909] [2021-08-21 13:25:56,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42356909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:56,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304418100] [2021-08-21 13:25:56,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:56,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:56,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:56,868 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:25:56,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 13:26:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:05,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:26:05,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:05,919 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-21 13:26:05,919 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 122 [2021-08-21 13:26:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:06,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304418100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:06,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:06,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:26:06,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322656521] [2021-08-21 13:26:06,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:06,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:06,664 INFO L87 Difference]: Start difference. First operand 1667 states and 5623 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:09,126 INFO L93 Difference]: Finished difference Result 2431 states and 7866 transitions. [2021-08-21 13:26:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:26:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:09,131 INFO L225 Difference]: With dead ends: 2431 [2021-08-21 13:26:09,131 INFO L226 Difference]: Without dead ends: 2416 [2021-08-21 13:26:09,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2178.8ms TimeCoverageRelationStatistics Valid=287, Invalid=973, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:26:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-08-21 13:26:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1660. [2021-08-21 13:26:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.373719107896323) internal successors, (5597), 1659 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5597 transitions. [2021-08-21 13:26:09,155 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5597 transitions. Word has length 26 [2021-08-21 13:26:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:09,155 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 5597 transitions. [2021-08-21 13:26:09,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5597 transitions. [2021-08-21 13:26:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:09,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:09,157 INFO L512 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] [2021-08-21 13:26:09,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:09,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:09,363 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1138462865, now seen corresponding path program 59 times [2021-08-21 13:26:09,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:09,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398498395] [2021-08-21 13:26:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:09,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:09,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:09,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398498395] [2021-08-21 13:26:09,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398498395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:09,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570589891] [2021-08-21 13:26:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:26:09,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:09,935 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:09,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 13:26:18,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:26:18,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:18,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 13:26:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:26:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 13:26:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 13:26:19,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 87 [2021-08-21 13:26:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:19,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570589891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:19,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:19,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:26:19,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047797373] [2021-08-21 13:26:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:26:19,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:26:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:26:19,397 INFO L87 Difference]: Start difference. First operand 1660 states and 5597 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:21,539 INFO L93 Difference]: Finished difference Result 2905 states and 9252 transitions. [2021-08-21 13:26:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:26:21,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:21,544 INFO L225 Difference]: With dead ends: 2905 [2021-08-21 13:26:21,544 INFO L226 Difference]: Without dead ends: 2868 [2021-08-21 13:26:21,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1994.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:26:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-08-21 13:26:21,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 1686. [2021-08-21 13:26:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.37566765578635) internal successors, (5688), 1685 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5688 transitions. [2021-08-21 13:26:21,571 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5688 transitions. Word has length 26 [2021-08-21 13:26:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:21,571 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 5688 transitions. [2021-08-21 13:26:21,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5688 transitions. [2021-08-21 13:26:21,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:21,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:21,573 INFO L512 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] [2021-08-21 13:26:21,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:21,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:21,797 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 695185787, now seen corresponding path program 60 times [2021-08-21 13:26:21,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:21,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339112936] [2021-08-21 13:26:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:21,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:22,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:22,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339112936] [2021-08-21 13:26:22,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339112936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:22,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904309059] [2021-08-21 13:26:22,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:26:22,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:22,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:22,383 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:22,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 13:26:29,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:26:29,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:29,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 13:26:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:26:30,647 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 13:26:30,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 147 [2021-08-21 13:26:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:32,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904309059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:32,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:32,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 13:26:32,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125122982] [2021-08-21 13:26:32,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:26:32,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:26:32,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:26:32,022 INFO L87 Difference]: Start difference. First operand 1686 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:35,712 INFO L93 Difference]: Finished difference Result 2563 states and 8122 transitions. [2021-08-21 13:26:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:26:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:35,717 INFO L225 Difference]: With dead ends: 2563 [2021-08-21 13:26:35,717 INFO L226 Difference]: Without dead ends: 2519 [2021-08-21 13:26:35,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 3410.9ms TimeCoverageRelationStatistics Valid=404, Invalid=1948, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:26:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-08-21 13:26:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1699. [2021-08-21 13:26:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 3.384570082449941) internal successors, (5747), 1698 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 5747 transitions. [2021-08-21 13:26:35,743 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 5747 transitions. Word has length 26 [2021-08-21 13:26:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:35,743 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 5747 transitions. [2021-08-21 13:26:35,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 5747 transitions. [2021-08-21 13:26:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:35,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:35,746 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:26:35,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:35,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 13:26:35,973 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash -220374169, now seen corresponding path program 56 times [2021-08-21 13:26:35,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:35,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59944079] [2021-08-21 13:26:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:35,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:37,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:37,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59944079] [2021-08-21 13:26:37,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59944079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:37,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686546684] [2021-08-21 13:26:37,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:37,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:37,003 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:37,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 13:26:45,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:45,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:45,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 13:26:45,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:46,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:26:46,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 103 [2021-08-21 13:26:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:47,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686546684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:47,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:47,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:26:47,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385324563] [2021-08-21 13:26:47,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:26:47,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:26:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:26:47,048 INFO L87 Difference]: Start difference. First operand 1699 states and 5747 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:52,239 INFO L93 Difference]: Finished difference Result 2563 states and 8227 transitions. [2021-08-21 13:26:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:26:52,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:52,244 INFO L225 Difference]: With dead ends: 2563 [2021-08-21 13:26:52,244 INFO L226 Difference]: Without dead ends: 2533 [2021-08-21 13:26:52,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 4708.7ms TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:26:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-08-21 13:26:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1708. [2021-08-21 13:26:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.378441710603398) internal successors, (5767), 1707 states have internal predecessors, (5767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5767 transitions. [2021-08-21 13:26:52,280 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5767 transitions. Word has length 26 [2021-08-21 13:26:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:52,280 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 5767 transitions. [2021-08-21 13:26:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5767 transitions. [2021-08-21 13:26:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:52,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:52,283 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:26:52,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:52,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:52,509 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2117257861, now seen corresponding path program 57 times [2021-08-21 13:26:52,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:52,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228336563] [2021-08-21 13:26:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:52,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:53,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:53,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228336563] [2021-08-21 13:26:53,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228336563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:53,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739867783] [2021-08-21 13:26:53,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:26:53,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:53,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:53,305 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:26:53,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 13:27:01,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:27:01,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:01,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 13:27:01,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:03,075 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-21 13:27:03,075 INFO L388 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 227 treesize of output 131 [2021-08-21 13:27:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:03,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739867783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:03,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:03,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:27:03,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125207358] [2021-08-21 13:27:03,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:27:03,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:27:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:27:03,573 INFO L87 Difference]: Start difference. First operand 1708 states and 5767 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:06,971 INFO L93 Difference]: Finished difference Result 2702 states and 8680 transitions. [2021-08-21 13:27:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:27:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:06,976 INFO L225 Difference]: With dead ends: 2702 [2021-08-21 13:27:06,976 INFO L226 Difference]: Without dead ends: 2672 [2021-08-21 13:27:06,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2655.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:27:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-08-21 13:27:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1703. [2021-08-21 13:27:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.3772032902467686) internal successors, (5748), 1702 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5748 transitions. [2021-08-21 13:27:07,002 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5748 transitions. Word has length 26 [2021-08-21 13:27:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:07,003 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 5748 transitions. [2021-08-21 13:27:07,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5748 transitions. [2021-08-21 13:27:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:07,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:07,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:27:07,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:07,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:07,229 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash -761787201, now seen corresponding path program 58 times [2021-08-21 13:27:07,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:07,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635018118] [2021-08-21 13:27:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:07,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:07,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:07,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635018118] [2021-08-21 13:27:07,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635018118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:07,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104217595] [2021-08-21 13:27:07,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:27:07,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:07,945 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:07,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 13:27:16,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:27:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:16,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:27:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:16,771 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:27:16,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 86 [2021-08-21 13:27:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:17,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104217595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:17,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:17,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:27:17,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505162767] [2021-08-21 13:27:17,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:17,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:17,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:17,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:17,421 INFO L87 Difference]: Start difference. First operand 1703 states and 5748 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:18,794 INFO L93 Difference]: Finished difference Result 2383 states and 7836 transitions. [2021-08-21 13:27:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:27:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:18,798 INFO L225 Difference]: With dead ends: 2383 [2021-08-21 13:27:18,798 INFO L226 Difference]: Without dead ends: 2358 [2021-08-21 13:27:18,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1533.5ms TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:27:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-08-21 13:27:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1691. [2021-08-21 13:27:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.3816568047337277) internal successors, (5715), 1690 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5715 transitions. [2021-08-21 13:27:18,822 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5715 transitions. Word has length 26 [2021-08-21 13:27:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:18,822 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5715 transitions. [2021-08-21 13:27:18,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5715 transitions. [2021-08-21 13:27:18,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:18,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:18,825 INFO L512 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] [2021-08-21 13:27:18,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:19,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-21 13:27:19,053 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1233492033, now seen corresponding path program 61 times [2021-08-21 13:27:19,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:19,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814387446] [2021-08-21 13:27:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:19,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:19,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:19,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814387446] [2021-08-21 13:27:19,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814387446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:19,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476451500] [2021-08-21 13:27:19,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:27:19,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:19,537 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:19,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 13:27:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:27:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:29,080 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:27:29,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 99 [2021-08-21 13:27:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:29,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476451500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:29,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:29,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:27:29,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734439462] [2021-08-21 13:27:29,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:29,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:29,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:29,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:29,350 INFO L87 Difference]: Start difference. First operand 1691 states and 5715 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:30,557 INFO L93 Difference]: Finished difference Result 2149 states and 7119 transitions. [2021-08-21 13:27:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:27:30,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:30,561 INFO L225 Difference]: With dead ends: 2149 [2021-08-21 13:27:30,561 INFO L226 Difference]: Without dead ends: 2134 [2021-08-21 13:27:30,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1199.0ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:27:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-08-21 13:27:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1695. [2021-08-21 13:27:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.3819362455726094) internal successors, (5729), 1694 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5729 transitions. [2021-08-21 13:27:30,585 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5729 transitions. Word has length 26 [2021-08-21 13:27:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:30,585 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 5729 transitions. [2021-08-21 13:27:30,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5729 transitions. [2021-08-21 13:27:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:30,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:30,588 INFO L512 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] [2021-08-21 13:27:30,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 13:27:30,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:30,805 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:30,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1883570723, now seen corresponding path program 62 times [2021-08-21 13:27:30,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:30,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687002180] [2021-08-21 13:27:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:30,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:31,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:31,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687002180] [2021-08-21 13:27:31,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687002180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:31,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168868563] [2021-08-21 13:27:31,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:27:31,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:31,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:31,213 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:31,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 13:27:40,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:27:40,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:27:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:27:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:27:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:27:40,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:27:40,719 INFO L388 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 159 treesize of output 131 [2021-08-21 13:27:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:41,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168868563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:41,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:41,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 13:27:41,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513069334] [2021-08-21 13:27:41,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:41,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:41,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:41,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:41,398 INFO L87 Difference]: Start difference. First operand 1695 states and 5729 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:43,529 INFO L93 Difference]: Finished difference Result 2681 states and 8589 transitions. [2021-08-21 13:27:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:27:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:43,534 INFO L225 Difference]: With dead ends: 2681 [2021-08-21 13:27:43,534 INFO L226 Difference]: Without dead ends: 2644 [2021-08-21 13:27:43,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1885.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:27:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-08-21 13:27:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1701. [2021-08-21 13:27:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 3.3770588235294117) internal successors, (5741), 1700 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 5741 transitions. [2021-08-21 13:27:43,560 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 5741 transitions. Word has length 26 [2021-08-21 13:27:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:43,560 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 5741 transitions. [2021-08-21 13:27:43,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 5741 transitions. [2021-08-21 13:27:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:43,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:43,562 INFO L512 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] [2021-08-21 13:27:43,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 13:27:43,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:43,778 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash 337333567, now seen corresponding path program 63 times [2021-08-21 13:27:43,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:43,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939532781] [2021-08-21 13:27:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:43,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:44,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:44,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939532781] [2021-08-21 13:27:44,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939532781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:44,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901377955] [2021-08-21 13:27:44,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:27:44,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:44,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:44,229 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:44,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 13:27:53,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:27:53,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:53,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 13:27:53,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:53,706 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:27:53,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 117 [2021-08-21 13:27:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:54,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901377955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:54,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:54,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:27:54,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252559767] [2021-08-21 13:27:54,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:27:54,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:27:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:27:54,950 INFO L87 Difference]: Start difference. First operand 1701 states and 5741 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:56,854 INFO L93 Difference]: Finished difference Result 2294 states and 7382 transitions. [2021-08-21 13:27:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:27:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:56,858 INFO L225 Difference]: With dead ends: 2294 [2021-08-21 13:27:56,858 INFO L226 Difference]: Without dead ends: 2245 [2021-08-21 13:27:56,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1715.9ms TimeCoverageRelationStatistics Valid=320, Invalid=1320, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:27:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-08-21 13:27:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 1727. [2021-08-21 13:27:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 3.3852838933951332) internal successors, (5843), 1726 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 5843 transitions. [2021-08-21 13:27:56,882 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 5843 transitions. Word has length 26 [2021-08-21 13:27:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:56,882 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 5843 transitions. [2021-08-21 13:27:56,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 5843 transitions. [2021-08-21 13:27:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:56,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:56,885 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:27:56,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:57,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 13:27:57,109 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1716601767, now seen corresponding path program 59 times [2021-08-21 13:27:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:57,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432736174] [2021-08-21 13:27:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:57,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:27:57,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:57,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432736174] [2021-08-21 13:27:57,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432736174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:57,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789400243] [2021-08-21 13:27:57,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:27:57,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:57,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:57,889 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:57,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 13:28:07,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:28:07,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:28:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:08,871 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:28:08,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 94 [2021-08-21 13:28:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:09,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789400243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:09,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:09,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:28:09,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665273320] [2021-08-21 13:28:09,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:28:09,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:28:09,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:28:09,068 INFO L87 Difference]: Start difference. First operand 1727 states and 5843 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:10,187 INFO L93 Difference]: Finished difference Result 2223 states and 7372 transitions. [2021-08-21 13:28:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:28:10,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:28:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:10,192 INFO L225 Difference]: With dead ends: 2223 [2021-08-21 13:28:10,192 INFO L226 Difference]: Without dead ends: 2208 [2021-08-21 13:28:10,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1082.0ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:28:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-08-21 13:28:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1729. [2021-08-21 13:28:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 3.3819444444444446) internal successors, (5844), 1728 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 5844 transitions. [2021-08-21 13:28:10,215 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 5844 transitions. Word has length 26 [2021-08-21 13:28:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:10,215 INFO L470 AbstractCegarLoop]: Abstraction has 1729 states and 5844 transitions. [2021-08-21 13:28:10,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 5844 transitions. [2021-08-21 13:28:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:10,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:10,218 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:10,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:10,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:10,433 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1040484733, now seen corresponding path program 60 times [2021-08-21 13:28:10,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:10,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987146932] [2021-08-21 13:28:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:10,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:28:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987146932] [2021-08-21 13:28:11,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987146932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:11,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113136402] [2021-08-21 13:28:11,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:11,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:11,365 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:28:11,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 13:28:16,582 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:28:16,582 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 [2021-08-21 13:28:17,589 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:28:17,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:17,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:17,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 13:28:17,790 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while executing Executor. [2021-08-21 13:28:17,792 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:28:17,792 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:28:17,792 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:28:17,795 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:28:17,795 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:28:17,797 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:28:17 BasicIcfg [2021-08-21 13:28:17,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:28:17,797 INFO L168 Benchmark]: Toolchain (without parser) took 867477.95 ms. Allocated memory was 162.5 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 142.6 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 13:28:17,797 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 162.5 MB. Free memory is still 143.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:28:17,797 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.39 ms. Allocated memory is still 162.5 MB. Free memory was 142.6 MB in the beginning and 141.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:17,797 INFO L168 Benchmark]: Boogie Preprocessor took 23.13 ms. Allocated memory is still 162.5 MB. Free memory was 141.1 MB in the beginning and 140.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:17,797 INFO L168 Benchmark]: RCFGBuilder took 194.10 ms. Allocated memory is still 162.5 MB. Free memory was 140.1 MB in the beginning and 126.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:28:17,798 INFO L168 Benchmark]: TraceAbstraction took 867234.68 ms. Allocated memory was 162.5 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 125.8 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-21 13:28:17,798 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 0.10 ms. Allocated memory is still 162.5 MB. Free memory is still 143.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.39 ms. Allocated memory is still 162.5 MB. Free memory was 142.6 MB in the beginning and 141.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.13 ms. Allocated memory is still 162.5 MB. Free memory was 141.1 MB in the beginning and 140.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 194.10 ms. Allocated memory is still 162.5 MB. Free memory was 140.1 MB in the beginning and 126.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 867234.68 ms. Allocated memory was 162.5 MB in the beginning and 2.5 GB in the end (delta: 2.4 GB). Free memory was 125.8 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 867172.3ms, OverallIterations: 125, TraceHistogramMax: 2, EmptinessCheckTime: 311.0ms, AutomataDifference: 200187.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5236 SDtfs, 24045 SDslu, 37882 SDs, 0 SdLazy, 71544 SolverSat, 3983 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44886.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6540 GetRequests, 2286 SyntacticMatches, 123 SemanticMatches, 4131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46029 ImplicationChecksByTransitivity, 190247.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1729occurred in iteration=124, InterpolantAutomatonStates: 3124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2638.0ms AutomataMinimizationTime, 124 MinimizatonAttempts, 84479 StatesRemovedByMinimization, 123 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 430.4ms SsaConstructionTime, 2903.1ms SatisfiabilityAnalysisTime, 199516.0ms InterpolantComputationTime, 6214 NumberOfCodeBlocks, 6214 NumberOfCodeBlocksAsserted, 397 NumberOfCheckSat, 5968 ConstructedInterpolants, 161 QuantifiedInterpolants, 203679 SizeOfPredicates, 846 NumberOfNonLiveVariables, 8636 ConjunctsInSsa, 3054 ConjunctsInUnsatCore, 246 InterpolantComputations, 2 PerfectInterpolantSequences, 106/1465 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