/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:32:12,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:32:12,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:32:12,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 18:32:12,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:32:12,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:32:12,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:32:12,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:32:12,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:32:12,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:32:12,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:32:12,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:32:12,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:32:12,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:32:12,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:32:12,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:32:12,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:32:12,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:32:12,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:32:12,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:32:12,509 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-Delay.epf [2021-08-21 18:32:12,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:32:12,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:32:12,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:32:12,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:32:12,526 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:32:12,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:32:12,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:32:12,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:32:12,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:32:12,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:32:12,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:32:12,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:32:12,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:32:12,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:32:12,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:32:12,528 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:32:12,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:32:12,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:32:12,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:32:12,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:32:12,761 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:32:12,762 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:32:12,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-08-21 18:32:12,764 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-08-21 18:32:12,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:32:12,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:32:12,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:32:12,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:32:12,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:32:12,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:32:12,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:32:12,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:32:12,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:32:12,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:32:12,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:32:12,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:32:12,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:32:12,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/1) ... [2021-08-21 18:32:12,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:32:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:12,854 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 18:32:12,859 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 18:32:12,883 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:32:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:32:12,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:32:12,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:32:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:32:12,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:32:12,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:32:12,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:32:12,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:32:12,884 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 18:32:13,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:32:13,017 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:32:13,018 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:32:13 BoogieIcfgContainer [2021-08-21 18:32:13,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:32:13,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:32:13,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:32:13,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:32:13,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:32:12" (1/2) ... [2021-08-21 18:32:13,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e039fc and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:32:13, skipping insertion in model container [2021-08-21 18:32:13,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:32:13" (2/2) ... [2021-08-21 18:32:13,023 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-08-21 18:32:13,026 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:32:13,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:32:13,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:32:13,026 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:32:13,062 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 18:32:13,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:32:13,100 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 18:32:13,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 18:32:13,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 50 states have (on average 1.76) internal successors, (88), 62 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 18:32:13,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:13,187 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:13,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:13,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1159434139, now seen corresponding path program 1 times [2021-08-21 18:32:13,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:13,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544510378] [2021-08-21 18:32:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:13,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:13,281 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 18:32:13,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:13,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544510378] [2021-08-21 18:32:13,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544510378] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:32:13,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:32:13,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:32:13,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924238722] [2021-08-21 18:32:13,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:32:13,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:32:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:32:13,294 INFO L87 Difference]: Start difference. First operand has 63 states, 50 states have (on average 1.76) internal successors, (88), 62 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:13,315 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2021-08-21 18:32:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:32:13,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 18:32:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:13,324 INFO L225 Difference]: With dead ends: 102 [2021-08-21 18:32:13,324 INFO L226 Difference]: Without dead ends: 70 [2021-08-21 18:32:13,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:32:13,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-21 18:32:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2021-08-21 18:32:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2021-08-21 18:32:13,358 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 14 [2021-08-21 18:32:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:13,360 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2021-08-21 18:32:13,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2021-08-21 18:32:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:32:13,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:13,361 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 18:32:13,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:32:13,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1872176956, now seen corresponding path program 1 times [2021-08-21 18:32:13,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:13,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693775844] [2021-08-21 18:32:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:13,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:13,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:13,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693775844] [2021-08-21 18:32:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693775844] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:32:13,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:32:13,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:32:13,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874227202] [2021-08-21 18:32:13,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:32:13,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:32:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:32:13,431 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:13,471 INFO L93 Difference]: Finished difference Result 71 states and 111 transitions. [2021-08-21 18:32:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:32:13,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:32:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:13,475 INFO L225 Difference]: With dead ends: 71 [2021-08-21 18:32:13,475 INFO L226 Difference]: Without dead ends: 68 [2021-08-21 18:32:13,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:32:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-21 18:32:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-08-21 18:32:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 107 transitions. [2021-08-21 18:32:13,490 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 107 transitions. Word has length 18 [2021-08-21 18:32:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:13,490 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 107 transitions. [2021-08-21 18:32:13,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 107 transitions. [2021-08-21 18:32:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:32:13,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:13,492 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] [2021-08-21 18:32:13,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:32:13,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1955421362, now seen corresponding path program 1 times [2021-08-21 18:32:13,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:13,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950022060] [2021-08-21 18:32:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:13,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:13,685 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 18:32:13,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:13,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950022060] [2021-08-21 18:32:13,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950022060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:13,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904337684] [2021-08-21 18:32:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:13,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:13,687 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 18:32:13,688 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 18:32:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:32:13,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:13,876 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 13 treesize of output 9 [2021-08-21 18:32:13,922 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 11 treesize of output 7 [2021-08-21 18:32:13,955 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 18:32:13,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904337684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:13,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:13,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:32:13,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171163569] [2021-08-21 18:32:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:32:13,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:13,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:32:13,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:32:13,957 INFO L87 Difference]: Start difference. First operand 67 states and 107 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:14,073 INFO L93 Difference]: Finished difference Result 126 states and 201 transitions. [2021-08-21 18:32:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:32:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:32:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:14,080 INFO L225 Difference]: With dead ends: 126 [2021-08-21 18:32:14,080 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:32:14,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:32:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:32:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2021-08-21 18:32:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.5957446808510638) internal successors, (150), 94 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 150 transitions. [2021-08-21 18:32:14,090 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 150 transitions. Word has length 23 [2021-08-21 18:32:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:14,091 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 150 transitions. [2021-08-21 18:32:14,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 150 transitions. [2021-08-21 18:32:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:32:14,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:14,092 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, 1] [2021-08-21 18:32:14,111 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 18:32:14,301 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 18:32:14,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:14,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1755474705, now seen corresponding path program 2 times [2021-08-21 18:32:14,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:14,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254038655] [2021-08-21 18:32:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:14,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:14,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:14,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254038655] [2021-08-21 18:32:14,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254038655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:14,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934621468] [2021-08-21 18:32:14,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:32:14,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:14,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:14,379 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 18:32:14,380 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 18:32:14,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:32:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:32:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:14,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934621468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:14,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:14,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-08-21 18:32:14,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432499377] [2021-08-21 18:32:14,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:32:14,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:14,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:32:14,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:32:14,517 INFO L87 Difference]: Start difference. First operand 95 states and 150 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:14,586 INFO L93 Difference]: Finished difference Result 204 states and 320 transitions. [2021-08-21 18:32:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:32:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 18:32:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:14,588 INFO L225 Difference]: With dead ends: 204 [2021-08-21 18:32:14,588 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 18:32:14,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:32:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 18:32:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 170. [2021-08-21 18:32:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.6863905325443787) internal successors, (285), 169 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 285 transitions. [2021-08-21 18:32:14,607 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 285 transitions. Word has length 27 [2021-08-21 18:32:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:14,607 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 285 transitions. [2021-08-21 18:32:14,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 285 transitions. [2021-08-21 18:32:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:32:14,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:14,611 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:14,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 18:32:14,822 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 18:32:14,823 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:14,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:14,823 INFO L82 PathProgramCache]: Analyzing trace with hash 857498431, now seen corresponding path program 3 times [2021-08-21 18:32:14,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:14,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585645337] [2021-08-21 18:32:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:14,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:15,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:15,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585645337] [2021-08-21 18:32:15,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585645337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:15,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930524949] [2021-08-21 18:32:15,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:32:15,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:15,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:15,173 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 18:32:15,203 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 18:32:15,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:32:15,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:32:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:15,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:15,514 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 29 treesize of output 27 [2021-08-21 18:32:15,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:15,831 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 28 treesize of output 46 [2021-08-21 18:32:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:16,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930524949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:16,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:16,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-21 18:32:16,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281877584] [2021-08-21 18:32:16,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:32:16,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:32:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:32:16,018 INFO L87 Difference]: Start difference. First operand 170 states and 285 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:17,238 INFO L93 Difference]: Finished difference Result 417 states and 679 transitions. [2021-08-21 18:32:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:32:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:32:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:17,240 INFO L225 Difference]: With dead ends: 417 [2021-08-21 18:32:17,240 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 18:32:17,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1089.5ms TimeCoverageRelationStatistics Valid=530, Invalid=2226, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:32:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 18:32:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 242. [2021-08-21 18:32:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.7261410788381744) internal successors, (416), 241 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 416 transitions. [2021-08-21 18:32:17,246 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 416 transitions. Word has length 32 [2021-08-21 18:32:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:17,246 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 416 transitions. [2021-08-21 18:32:17,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 416 transitions. [2021-08-21 18:32:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:32:17,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:17,247 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:17,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:17,463 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 18:32:17,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash 811495449, now seen corresponding path program 4 times [2021-08-21 18:32:17,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:17,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822938008] [2021-08-21 18:32:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:17,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:17,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:17,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822938008] [2021-08-21 18:32:17,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822938008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:17,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779061665] [2021-08-21 18:32:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:32:17,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:17,752 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 18:32:17,753 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 18:32:17,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:32:17,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:32:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:18,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:18,307 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 36 treesize of output 36 [2021-08-21 18:32:18,462 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-21 18:32:18,463 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 34 treesize of output 23 [2021-08-21 18:32:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779061665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:18,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:18,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-08-21 18:32:18,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405436044] [2021-08-21 18:32:18,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:32:18,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:32:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:32:18,488 INFO L87 Difference]: Start difference. First operand 242 states and 416 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:19,058 INFO L93 Difference]: Finished difference Result 527 states and 897 transitions. [2021-08-21 18:32:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:32:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:32:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:19,062 INFO L225 Difference]: With dead ends: 527 [2021-08-21 18:32:19,062 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 18:32:19,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:32:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 18:32:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 261. [2021-08-21 18:32:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.7423076923076923) internal successors, (453), 260 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 453 transitions. [2021-08-21 18:32:19,072 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 453 transitions. Word has length 32 [2021-08-21 18:32:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:19,076 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 453 transitions. [2021-08-21 18:32:19,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 453 transitions. [2021-08-21 18:32:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:32:19,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:19,077 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:19,095 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 18:32:19,278 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 18:32:19,278 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1644647295, now seen corresponding path program 5 times [2021-08-21 18:32:19,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:19,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077190650] [2021-08-21 18:32:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:19,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:19,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077190650] [2021-08-21 18:32:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077190650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905365314] [2021-08-21 18:32:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:32:19,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:19,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:19,571 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 18:32:19,572 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 18:32:19,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:32:19,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:32:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:20,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:20,122 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 32 treesize of output 32 [2021-08-21 18:32:20,255 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:32:20,256 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 30 treesize of output 21 [2021-08-21 18:32:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:20,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905365314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:20,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:20,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-08-21 18:32:20,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892285617] [2021-08-21 18:32:20,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:32:20,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:20,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:32:20,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:32:20,279 INFO L87 Difference]: Start difference. First operand 261 states and 453 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:20,729 INFO L93 Difference]: Finished difference Result 523 states and 882 transitions. [2021-08-21 18:32:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:32:20,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:32:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:20,731 INFO L225 Difference]: With dead ends: 523 [2021-08-21 18:32:20,731 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 18:32:20,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:32:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 18:32:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 290. [2021-08-21 18:32:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.7335640138408304) internal successors, (501), 289 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 501 transitions. [2021-08-21 18:32:20,737 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 501 transitions. Word has length 32 [2021-08-21 18:32:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:20,738 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 501 transitions. [2021-08-21 18:32:20,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 501 transitions. [2021-08-21 18:32:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:32:20,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:20,738 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:20,755 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 18:32:20,952 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 18:32:20,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1533490558, now seen corresponding path program 6 times [2021-08-21 18:32:20,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:20,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299569748] [2021-08-21 18:32:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:20,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:21,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:21,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299569748] [2021-08-21 18:32:21,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299569748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:21,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886028563] [2021-08-21 18:32:21,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:32:21,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:21,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:21,035 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 18:32:21,035 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 18:32:21,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:32:21,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:21,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:32:21,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:21,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886028563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:21,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:21,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-08-21 18:32:21,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598570141] [2021-08-21 18:32:21,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:32:21,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:21,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:32:21,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:32:21,323 INFO L87 Difference]: Start difference. First operand 290 states and 501 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:21,399 INFO L93 Difference]: Finished difference Result 513 states and 869 transitions. [2021-08-21 18:32:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:32:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:32:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:21,401 INFO L225 Difference]: With dead ends: 513 [2021-08-21 18:32:21,401 INFO L226 Difference]: Without dead ends: 494 [2021-08-21 18:32:21,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:32:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-21 18:32:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 409. [2021-08-21 18:32:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.7303921568627452) internal successors, (706), 408 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 706 transitions. [2021-08-21 18:32:21,408 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 706 transitions. Word has length 36 [2021-08-21 18:32:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:21,408 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 706 transitions. [2021-08-21 18:32:21,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 706 transitions. [2021-08-21 18:32:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:32:21,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:21,409 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:21,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:32:21,616 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 18:32:21,617 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1660410348, now seen corresponding path program 7 times [2021-08-21 18:32:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:21,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982584290] [2021-08-21 18:32:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:21,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:22,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:22,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982584290] [2021-08-21 18:32:22,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982584290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:22,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566380408] [2021-08-21 18:32:22,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:32:22,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:22,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:22,426 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 18:32:22,427 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 18:32:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:22,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:32:22,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:23,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:23,289 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 55 treesize of output 63 [2021-08-21 18:32:23,699 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:32:23,700 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 33 treesize of output 13 [2021-08-21 18:32:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:23,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566380408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:23,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:23,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-08-21 18:32:23,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465801965] [2021-08-21 18:32:23,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:32:23,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:32:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:32:23,723 INFO L87 Difference]: Start difference. First operand 409 states and 706 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:24,957 INFO L93 Difference]: Finished difference Result 979 states and 1665 transitions. [2021-08-21 18:32:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:32:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:32:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:24,960 INFO L225 Difference]: With dead ends: 979 [2021-08-21 18:32:24,960 INFO L226 Difference]: Without dead ends: 900 [2021-08-21 18:32:24,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1281.1ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:32:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-08-21 18:32:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 371. [2021-08-21 18:32:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6837837837837837) internal successors, (623), 370 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 623 transitions. [2021-08-21 18:32:24,969 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 623 transitions. Word has length 41 [2021-08-21 18:32:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:24,970 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 623 transitions. [2021-08-21 18:32:24,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 36 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 623 transitions. [2021-08-21 18:32:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:32:24,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:24,970 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:24,989 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 18:32:25,184 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 18:32:25,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash -609860920, now seen corresponding path program 8 times [2021-08-21 18:32:25,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:25,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804269513] [2021-08-21 18:32:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:25,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:25,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:25,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804269513] [2021-08-21 18:32:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804269513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:25,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071183270] [2021-08-21 18:32:25,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:32:25,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:25,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:25,672 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 18:32:25,672 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 18:32:25,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:32:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:32:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:27,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:27,073 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 52 treesize of output 62 [2021-08-21 18:32:27,280 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-08-21 18:32:27,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 29 [2021-08-21 18:32:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:27,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071183270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:27,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:27,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-08-21 18:32:27,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905921343] [2021-08-21 18:32:27,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:32:27,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:27,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:32:27,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:32:27,321 INFO L87 Difference]: Start difference. First operand 371 states and 623 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:29,111 INFO L93 Difference]: Finished difference Result 1106 states and 1886 transitions. [2021-08-21 18:32:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:32:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:32:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:29,115 INFO L225 Difference]: With dead ends: 1106 [2021-08-21 18:32:29,115 INFO L226 Difference]: Without dead ends: 1017 [2021-08-21 18:32:29,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 1480.2ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:32:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-08-21 18:32:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 415. [2021-08-21 18:32:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.7077294685990339) internal successors, (707), 414 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 707 transitions. [2021-08-21 18:32:29,126 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 707 transitions. Word has length 41 [2021-08-21 18:32:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:29,126 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 707 transitions. [2021-08-21 18:32:29,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 707 transitions. [2021-08-21 18:32:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:32:29,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:29,128 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:29,147 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 18:32:29,344 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 18:32:29,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2109932334, now seen corresponding path program 9 times [2021-08-21 18:32:29,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:29,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215464971] [2021-08-21 18:32:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:29,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:32:29,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:29,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215464971] [2021-08-21 18:32:29,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215464971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:29,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556871905] [2021-08-21 18:32:29,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:32:29,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:29,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:29,785 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 18:32:29,788 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 18:32:30,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:32:30,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:32:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:30,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:30,947 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 51 treesize of output 61 [2021-08-21 18:32:31,246 INFO L354 Elim1Store]: treesize reduction 36, result has 65.7 percent of original size [2021-08-21 18:32:31,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 94 [2021-08-21 18:32:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:31,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556871905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:31,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:31,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-08-21 18:32:31,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554644458] [2021-08-21 18:32:31,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:32:31,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:32:31,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:32:31,971 INFO L87 Difference]: Start difference. First operand 415 states and 707 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:39,452 INFO L93 Difference]: Finished difference Result 2067 states and 3567 transitions. [2021-08-21 18:32:39,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-08-21 18:32:39,452 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:32:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:39,458 INFO L225 Difference]: With dead ends: 2067 [2021-08-21 18:32:39,458 INFO L226 Difference]: Without dead ends: 1936 [2021-08-21 18:32:39,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8864 ImplicationChecksByTransitivity, 6275.1ms TimeCoverageRelationStatistics Valid=2834, Invalid=20118, Unknown=0, NotChecked=0, Total=22952 [2021-08-21 18:32:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-08-21 18:32:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 710. [2021-08-21 18:32:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.7870239774330043) internal successors, (1267), 709 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1267 transitions. [2021-08-21 18:32:39,505 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1267 transitions. Word has length 41 [2021-08-21 18:32:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:39,505 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1267 transitions. [2021-08-21 18:32:39,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1267 transitions. [2021-08-21 18:32:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:32:39,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:39,506 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:39,522 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 18:32:39,720 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 18:32:39,720 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1351883116, now seen corresponding path program 10 times [2021-08-21 18:32:39,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:39,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725538635] [2021-08-21 18:32:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:39,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:32:40,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:40,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725538635] [2021-08-21 18:32:40,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725538635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:40,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203045332] [2021-08-21 18:32:40,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:32:40,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:40,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:40,144 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 18:32:40,145 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 18:32:40,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:32:40,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:32:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:41,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:41,570 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 52 treesize of output 62 [2021-08-21 18:32:41,760 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-08-21 18:32:41,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 29 [2021-08-21 18:32:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:41,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203045332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:41,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:41,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 34 [2021-08-21 18:32:41,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968160406] [2021-08-21 18:32:41,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 18:32:41,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 18:32:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:32:41,786 INFO L87 Difference]: Start difference. First operand 710 states and 1267 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:43,328 INFO L93 Difference]: Finished difference Result 2043 states and 3649 transitions. [2021-08-21 18:32:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:32:43,333 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:32:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:43,338 INFO L225 Difference]: With dead ends: 2043 [2021-08-21 18:32:43,338 INFO L226 Difference]: Without dead ends: 1912 [2021-08-21 18:32:43,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1296.8ms TimeCoverageRelationStatistics Valid=585, Invalid=3575, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 18:32:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-08-21 18:32:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 860. [2021-08-21 18:32:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 1.819557625145518) internal successors, (1563), 859 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1563 transitions. [2021-08-21 18:32:43,356 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1563 transitions. Word has length 41 [2021-08-21 18:32:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:43,356 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1563 transitions. [2021-08-21 18:32:43,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1563 transitions. [2021-08-21 18:32:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:32:43,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:43,358 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:43,375 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 18:32:43,567 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 18:32:43,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:43,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1693583150, now seen corresponding path program 11 times [2021-08-21 18:32:43,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:43,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776004292] [2021-08-21 18:32:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:43,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:32:43,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:43,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776004292] [2021-08-21 18:32:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776004292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:43,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125506271] [2021-08-21 18:32:43,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:32:43,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:43,954 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 18:32:43,965 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 18:32:44,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:32:44,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:32:44,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:45,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:45,775 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 48 treesize of output 58 [2021-08-21 18:32:45,998 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 18:32:45,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 27 [2021-08-21 18:32:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:46,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125506271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:46,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:46,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-08-21 18:32:46,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612053812] [2021-08-21 18:32:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:32:46,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:32:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:32:46,020 INFO L87 Difference]: Start difference. First operand 860 states and 1563 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:48,113 INFO L93 Difference]: Finished difference Result 2306 states and 4184 transitions. [2021-08-21 18:32:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:32:48,113 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:32:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:48,119 INFO L225 Difference]: With dead ends: 2306 [2021-08-21 18:32:48,119 INFO L226 Difference]: Without dead ends: 2196 [2021-08-21 18:32:48,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1760.6ms TimeCoverageRelationStatistics Valid=768, Invalid=4488, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:32:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-08-21 18:32:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1020. [2021-08-21 18:32:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 1.8184494602551522) internal successors, (1853), 1019 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1853 transitions. [2021-08-21 18:32:48,138 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1853 transitions. Word has length 41 [2021-08-21 18:32:48,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:48,138 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1853 transitions. [2021-08-21 18:32:48,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1853 transitions. [2021-08-21 18:32:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 18:32:48,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:48,140 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:48,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 18:32:48,352 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 18:32:48,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1373485844, now seen corresponding path program 12 times [2021-08-21 18:32:48,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:48,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168883050] [2021-08-21 18:32:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:48,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:32:48,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168883050] [2021-08-21 18:32:48,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168883050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:48,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739630805] [2021-08-21 18:32:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:32:48,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:48,724 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 18:32:48,725 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 18:32:49,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:32:49,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:32:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:50,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:50,203 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 57 treesize of output 67 [2021-08-21 18:32:50,493 INFO L354 Elim1Store]: treesize reduction 71, result has 32.4 percent of original size [2021-08-21 18:32:50,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 64 [2021-08-21 18:32:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:50,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739630805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:50,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:50,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-08-21 18:32:50,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017125691] [2021-08-21 18:32:50,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:32:50,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:32:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:32:50,758 INFO L87 Difference]: Start difference. First operand 1020 states and 1853 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:54,895 INFO L93 Difference]: Finished difference Result 2149 states and 3767 transitions. [2021-08-21 18:32:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 18:32:54,895 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 18:32:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:54,900 INFO L225 Difference]: With dead ends: 2149 [2021-08-21 18:32:54,900 INFO L226 Difference]: Without dead ends: 2034 [2021-08-21 18:32:54,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 2986.1ms TimeCoverageRelationStatistics Valid=1205, Invalid=6451, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 18:32:54,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-08-21 18:32:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1102. [2021-08-21 18:32:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 1.815622161671208) internal successors, (1999), 1101 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1999 transitions. [2021-08-21 18:32:54,917 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1999 transitions. Word has length 41 [2021-08-21 18:32:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:54,917 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1999 transitions. [2021-08-21 18:32:54,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1999 transitions. [2021-08-21 18:32:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 18:32:54,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:54,919 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:54,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-21 18:32:55,133 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 18:32:55,133 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -628286761, now seen corresponding path program 13 times [2021-08-21 18:32:55,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:55,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573375362] [2021-08-21 18:32:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:55,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:55,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:55,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573375362] [2021-08-21 18:32:55,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573375362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:55,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663601564] [2021-08-21 18:32:55,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:32:55,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:55,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:55,219 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 18:32:55,220 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 18:32:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:32:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663601564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:55,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:55,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-08-21 18:32:55,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990909579] [2021-08-21 18:32:55,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:32:55,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:32:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:32:55,942 INFO L87 Difference]: Start difference. First operand 1102 states and 1999 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:56,018 INFO L93 Difference]: Finished difference Result 1459 states and 2597 transitions. [2021-08-21 18:32:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:32:56,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 18:32:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:56,038 INFO L225 Difference]: With dead ends: 1459 [2021-08-21 18:32:56,038 INFO L226 Difference]: Without dead ends: 1432 [2021-08-21 18:32:56,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:32:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-08-21 18:32:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1275. [2021-08-21 18:32:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 1.8092621664050235) internal successors, (2305), 1274 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 2305 transitions. [2021-08-21 18:32:56,081 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 2305 transitions. Word has length 45 [2021-08-21 18:32:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:56,081 INFO L470 AbstractCegarLoop]: Abstraction has 1275 states and 2305 transitions. [2021-08-21 18:32:56,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 2305 transitions. [2021-08-21 18:32:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 18:32:56,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:56,083 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:56,103 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 18:32:56,301 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 18:32:56,301 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash -739220132, now seen corresponding path program 14 times [2021-08-21 18:32:56,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:56,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121013683] [2021-08-21 18:32:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:56,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:32:56,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121013683] [2021-08-21 18:32:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121013683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777521282] [2021-08-21 18:32:56,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:32:56,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:56,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:56,361 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 18:32:56,362 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 18:32:56,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:32:56,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:57,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:32:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:32:57,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777521282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:57,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:32:57,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:32:57,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938216659] [2021-08-21 18:32:57,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:32:57,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:32:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:32:57,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:32:57,114 INFO L87 Difference]: Start difference. First operand 1275 states and 2305 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 18:32:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:32:57,136 INFO L93 Difference]: Finished difference Result 1466 states and 2600 transitions. [2021-08-21 18:32:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:32:57,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 46 [2021-08-21 18:32:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:32:57,139 INFO L225 Difference]: With dead ends: 1466 [2021-08-21 18:32:57,139 INFO L226 Difference]: Without dead ends: 1466 [2021-08-21 18:32:57,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:32:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-08-21 18:32:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1151. [2021-08-21 18:32:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 1.788695652173913) internal successors, (2057), 1150 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:32:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2057 transitions. [2021-08-21 18:32:57,153 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2057 transitions. Word has length 46 [2021-08-21 18:32:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:32:57,153 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 2057 transitions. [2021-08-21 18:32:57,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 18:32:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2057 transitions. [2021-08-21 18:32:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:32:57,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:32:57,155 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:32:57,175 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 18:32:57,370 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 18:32:57,370 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:32:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:32:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1544987525, now seen corresponding path program 15 times [2021-08-21 18:32:57,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:32:57,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386432635] [2021-08-21 18:32:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:32:57,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:32:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:32:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:32:58,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:32:58,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386432635] [2021-08-21 18:32:58,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386432635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:32:58,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893562129] [2021-08-21 18:32:58,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:32:58,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:32:58,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:32:58,086 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 18:32:58,086 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 18:32:58,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:32:58,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:32:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:32:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:32:59,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:32:59,776 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 69 treesize of output 95 [2021-08-21 18:33:00,827 INFO L354 Elim1Store]: treesize reduction 195, result has 14.8 percent of original size [2021-08-21 18:33:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 72 [2021-08-21 18:33:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:01,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893562129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:01,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:01,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 52 [2021-08-21 18:33:01,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046576547] [2021-08-21 18:33:01,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 18:33:01,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 18:33:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2459, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:33:01,165 INFO L87 Difference]: Start difference. First operand 1151 states and 2057 transitions. Second operand has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:20,173 INFO L93 Difference]: Finished difference Result 2279 states and 3950 transitions. [2021-08-21 18:33:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-21 18:33:20,174 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:33:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:20,179 INFO L225 Difference]: With dead ends: 2279 [2021-08-21 18:33:20,179 INFO L226 Difference]: Without dead ends: 2194 [2021-08-21 18:33:20,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 13146.3ms TimeCoverageRelationStatistics Valid=4009, Invalid=27497, Unknown=0, NotChecked=0, Total=31506 [2021-08-21 18:33:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-08-21 18:33:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 1213. [2021-08-21 18:33:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 1.7854785478547854) internal successors, (2164), 1212 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2164 transitions. [2021-08-21 18:33:20,196 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2164 transitions. Word has length 50 [2021-08-21 18:33:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:20,197 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 2164 transitions. [2021-08-21 18:33:20,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 52 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2164 transitions. [2021-08-21 18:33:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:33:20,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:20,198 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:20,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:33:20,420 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 18:33:20,421 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:33:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1385082093, now seen corresponding path program 16 times [2021-08-21 18:33:20,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:20,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509510103] [2021-08-21 18:33:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:20,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:33:21,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:21,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509510103] [2021-08-21 18:33:21,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509510103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:21,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362218544] [2021-08-21 18:33:21,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:33:21,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:21,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:21,127 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 18:33:21,127 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 18:33:21,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:33:21,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:21,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:33:21,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:23,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:33:23,917 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 68 treesize of output 96 [2021-08-21 18:33:24,170 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-21 18:33:24,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 32 [2021-08-21 18:33:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:24,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362218544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:24,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:24,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-08-21 18:33:24,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300815395] [2021-08-21 18:33:24,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:33:24,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:24,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:33:24,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:33:24,207 INFO L87 Difference]: Start difference. First operand 1213 states and 2164 transitions. Second operand has 48 states, 48 states have (on average 1.875) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:29,004 INFO L93 Difference]: Finished difference Result 2242 states and 3891 transitions. [2021-08-21 18:33:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-21 18:33:29,004 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.875) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:33:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:29,009 INFO L225 Difference]: With dead ends: 2242 [2021-08-21 18:33:29,010 INFO L226 Difference]: Without dead ends: 2177 [2021-08-21 18:33:29,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 3443.6ms TimeCoverageRelationStatistics Valid=1301, Invalid=10909, Unknown=0, NotChecked=0, Total=12210 [2021-08-21 18:33:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-08-21 18:33:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1249. [2021-08-21 18:33:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 1.7868589743589745) internal successors, (2230), 1248 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2230 transitions. [2021-08-21 18:33:29,027 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2230 transitions. Word has length 50 [2021-08-21 18:33:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 2230 transitions. [2021-08-21 18:33:29,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.875) internal successors, (90), 47 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2230 transitions. [2021-08-21 18:33:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:33:29,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:29,030 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:29,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 18:33:29,231 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 18:33:29,231 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:33:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:29,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2026598521, now seen corresponding path program 17 times [2021-08-21 18:33:29,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:29,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740548572] [2021-08-21 18:33:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:29,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:33:29,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:29,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740548572] [2021-08-21 18:33:29,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740548572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:29,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328502650] [2021-08-21 18:33:29,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:33:29,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:29,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:29,901 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 18:33:29,902 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 18:33:30,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:33:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:33:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:32,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:33:32,554 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 56 treesize of output 84 [2021-08-21 18:33:32,726 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:33:32,726 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 44 treesize of output 16 [2021-08-21 18:33:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:32,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328502650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:32,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:32,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2021-08-21 18:33:32,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224249791] [2021-08-21 18:33:32,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 18:33:32,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 18:33:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:33:32,748 INFO L87 Difference]: Start difference. First operand 1249 states and 2230 transitions. Second operand has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 48 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:35,159 INFO L93 Difference]: Finished difference Result 2584 states and 4567 transitions. [2021-08-21 18:33:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:33:35,160 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 48 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:33:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:35,166 INFO L225 Difference]: With dead ends: 2584 [2021-08-21 18:33:35,167 INFO L226 Difference]: Without dead ends: 2544 [2021-08-21 18:33:35,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 2264.1ms TimeCoverageRelationStatistics Valid=707, Invalid=6949, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 18:33:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-08-21 18:33:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1519. [2021-08-21 18:33:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 1.8089591567852437) internal successors, (2746), 1518 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2746 transitions. [2021-08-21 18:33:35,190 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2746 transitions. Word has length 50 [2021-08-21 18:33:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:35,190 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 2746 transitions. [2021-08-21 18:33:35,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 48 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2746 transitions. [2021-08-21 18:33:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:33:35,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:35,193 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:35,213 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 18:33:35,404 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 18:33:35,405 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:33:35,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:35,405 INFO L82 PathProgramCache]: Analyzing trace with hash 451424479, now seen corresponding path program 18 times [2021-08-21 18:33:35,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:35,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383504656] [2021-08-21 18:33:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:35,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:33:36,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:36,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383504656] [2021-08-21 18:33:36,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383504656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:36,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382768019] [2021-08-21 18:33:36,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:33:36,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:36,056 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 18:33:36,056 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 18:33:37,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:33:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:33:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:38,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:33:38,824 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 58 treesize of output 86 [2021-08-21 18:33:39,100 INFO L354 Elim1Store]: treesize reduction 100, result has 41.5 percent of original size [2021-08-21 18:33:39,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 99 [2021-08-21 18:33:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:39,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382768019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:39,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:39,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 50 [2021-08-21 18:33:39,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029488046] [2021-08-21 18:33:39,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-21 18:33:39,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-21 18:33:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2279, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:33:39,777 INFO L87 Difference]: Start difference. First operand 1519 states and 2746 transitions. Second operand has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:44,717 INFO L93 Difference]: Finished difference Result 3765 states and 6818 transitions. [2021-08-21 18:33:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 18:33:44,717 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:33:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:44,723 INFO L225 Difference]: With dead ends: 3765 [2021-08-21 18:33:44,723 INFO L226 Difference]: Without dead ends: 3689 [2021-08-21 18:33:44,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 4023.5ms TimeCoverageRelationStatistics Valid=1365, Invalid=11291, Unknown=0, NotChecked=0, Total=12656 [2021-08-21 18:33:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2021-08-21 18:33:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 1913. [2021-08-21 18:33:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.8226987447698744) internal successors, (3485), 1912 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3485 transitions. [2021-08-21 18:33:44,751 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3485 transitions. Word has length 50 [2021-08-21 18:33:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:44,751 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 3485 transitions. [2021-08-21 18:33:44,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3485 transitions. [2021-08-21 18:33:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:33:44,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:44,754 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:44,773 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 18:33:44,964 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 18:33:44,964 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:33:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1284576325, now seen corresponding path program 19 times [2021-08-21 18:33:44,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:44,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596349117] [2021-08-21 18:33:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:44,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:33:45,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596349117] [2021-08-21 18:33:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596349117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439756170] [2021-08-21 18:33:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:33:45,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:45,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:45,608 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 18:33:45,609 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 18:33:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:46,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:33:46,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:48,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:33:48,606 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 68 treesize of output 96 [2021-08-21 18:33:48,866 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-21 18:33:48,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 32 [2021-08-21 18:33:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:48,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439756170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:48,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:48,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 46 [2021-08-21 18:33:48,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467914019] [2021-08-21 18:33:48,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:33:48,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:48,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:33:48,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:33:48,894 INFO L87 Difference]: Start difference. First operand 1913 states and 3485 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:33:53,573 INFO L93 Difference]: Finished difference Result 4427 states and 8005 transitions. [2021-08-21 18:33:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-21 18:33:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:33:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:33:53,579 INFO L225 Difference]: With dead ends: 4427 [2021-08-21 18:33:53,579 INFO L226 Difference]: Without dead ends: 4297 [2021-08-21 18:33:53,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3803 ImplicationChecksByTransitivity, 3186.4ms TimeCoverageRelationStatistics Valid=1206, Invalid=9506, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 18:33:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-08-21 18:33:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 2397. [2021-08-21 18:33:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2396 states have (on average 1.8280467445742905) internal successors, (4380), 2396 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 4380 transitions. [2021-08-21 18:33:53,611 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 4380 transitions. Word has length 50 [2021-08-21 18:33:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:33:53,611 INFO L470 AbstractCegarLoop]: Abstraction has 2397 states and 4380 transitions. [2021-08-21 18:33:53,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:33:53,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 4380 transitions. [2021-08-21 18:33:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:33:53,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:33:53,615 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:33:53,635 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 18:33:53,823 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 18:33:53,824 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:33:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:33:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1702799393, now seen corresponding path program 20 times [2021-08-21 18:33:53,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:33:53,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010588961] [2021-08-21 18:33:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:33:53,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:33:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:33:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:33:54,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:33:54,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010588961] [2021-08-21 18:33:54,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010588961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:54,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21575524] [2021-08-21 18:33:54,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:33:54,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:33:54,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:33:54,428 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 18:33:54,429 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 18:33:55,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:33:55,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:33:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:33:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:33:57,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:33:57,520 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 68 treesize of output 96 [2021-08-21 18:33:57,819 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-21 18:33:57,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 32 [2021-08-21 18:33:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:33:57,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21575524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:33:57,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:33:57,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 44 [2021-08-21 18:33:57,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857543680] [2021-08-21 18:33:57,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:33:57,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:33:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:33:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:33:57,842 INFO L87 Difference]: Start difference. First operand 2397 states and 4380 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:01,729 INFO L93 Difference]: Finished difference Result 4909 states and 8910 transitions. [2021-08-21 18:34:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 18:34:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:34:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:01,737 INFO L225 Difference]: With dead ends: 4909 [2021-08-21 18:34:01,738 INFO L226 Difference]: Without dead ends: 4796 [2021-08-21 18:34:01,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3593 ImplicationChecksByTransitivity, 2945.3ms TimeCoverageRelationStatistics Valid=1207, Invalid=8893, Unknown=0, NotChecked=0, Total=10100 [2021-08-21 18:34:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2021-08-21 18:34:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 2805. [2021-08-21 18:34:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 1.8305991440798859) internal successors, (5133), 2804 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 18:34:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 5133 transitions. [2021-08-21 18:34:01,779 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 5133 transitions. Word has length 50 [2021-08-21 18:34:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:01,779 INFO L470 AbstractCegarLoop]: Abstraction has 2805 states and 5133 transitions. [2021-08-21 18:34:01,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 5133 transitions. [2021-08-21 18:34:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:34:01,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:01,783 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:01,806 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 18:34:01,992 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 18:34:01,993 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:34:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:01,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1342666873, now seen corresponding path program 21 times [2021-08-21 18:34:01,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:01,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480453579] [2021-08-21 18:34:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:01,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:34:02,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:02,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480453579] [2021-08-21 18:34:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480453579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:02,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619963318] [2021-08-21 18:34:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:34:02,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:02,577 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 18:34:02,578 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 18:34:03,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:34:03,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:34:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:05,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:05,949 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 66 treesize of output 94 [2021-08-21 18:34:06,330 INFO L354 Elim1Store]: treesize reduction 195, result has 14.8 percent of original size [2021-08-21 18:34:06,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 72 [2021-08-21 18:34:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:06,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619963318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:06,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:06,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 46 [2021-08-21 18:34:06,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727599857] [2021-08-21 18:34:06,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:34:06,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:34:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:34:06,645 INFO L87 Difference]: Start difference. First operand 2805 states and 5133 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:34,951 INFO L93 Difference]: Finished difference Result 8898 states and 16405 transitions. [2021-08-21 18:34:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-08-21 18:34:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:34:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:34,963 INFO L225 Difference]: With dead ends: 8898 [2021-08-21 18:34:34,963 INFO L226 Difference]: Without dead ends: 8780 [2021-08-21 18:34:34,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9379 ImplicationChecksByTransitivity, 20225.9ms TimeCoverageRelationStatistics Valid=3320, Invalid=24736, Unknown=0, NotChecked=0, Total=28056 [2021-08-21 18:34:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8780 states. [2021-08-21 18:34:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8780 to 4021. [2021-08-21 18:34:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 4020 states have (on average 1.8751243781094526) internal successors, (7538), 4020 states have internal predecessors, (7538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 7538 transitions. [2021-08-21 18:34:35,035 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 7538 transitions. Word has length 50 [2021-08-21 18:34:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:35,035 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 7538 transitions. [2021-08-21 18:34:35,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 7538 transitions. [2021-08-21 18:34:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:34:35,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:35,041 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:35,065 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 18:34:35,256 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 18:34:35,257 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:34:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:35,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1232418465, now seen corresponding path program 22 times [2021-08-21 18:34:35,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:35,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007546465] [2021-08-21 18:34:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:35,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:34:35,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:35,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007546465] [2021-08-21 18:34:35,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007546465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:35,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756713838] [2021-08-21 18:34:35,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:34:35,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:35,860 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 18:34:35,861 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 18:34:37,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:34:37,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:34:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:39,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:39,176 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 68 treesize of output 96 [2021-08-21 18:34:39,435 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-21 18:34:39,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 32 [2021-08-21 18:34:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:39,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756713838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:39,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:39,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 43 [2021-08-21 18:34:39,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230022932] [2021-08-21 18:34:39,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:34:39,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:34:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:34:39,458 INFO L87 Difference]: Start difference. First operand 4021 states and 7538 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:42,124 INFO L93 Difference]: Finished difference Result 6285 states and 11629 transitions. [2021-08-21 18:34:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:34:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:34:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:42,132 INFO L225 Difference]: With dead ends: 6285 [2021-08-21 18:34:42,133 INFO L226 Difference]: Without dead ends: 6235 [2021-08-21 18:34:42,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2732 ImplicationChecksByTransitivity, 2244.1ms TimeCoverageRelationStatistics Valid=974, Invalid=6508, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 18:34:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6235 states. [2021-08-21 18:34:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6235 to 4349. [2021-08-21 18:34:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 1.875344986200552) internal successors, (8154), 4348 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 8154 transitions. [2021-08-21 18:34:42,201 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 8154 transitions. Word has length 50 [2021-08-21 18:34:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:42,201 INFO L470 AbstractCegarLoop]: Abstraction has 4349 states and 8154 transitions. [2021-08-21 18:34:42,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 8154 transitions. [2021-08-21 18:34:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:34:42,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:42,207 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:42,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:42,428 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 18:34:42,428 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:34:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1552515771, now seen corresponding path program 23 times [2021-08-21 18:34:42,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:42,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958962597] [2021-08-21 18:34:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:42,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:34:43,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:43,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958962597] [2021-08-21 18:34:43,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958962597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:43,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839323966] [2021-08-21 18:34:43,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:34:43,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:43,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:43,012 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 18:34:43,012 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 18:34:44,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:34:44,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:44,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:34:44,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:46,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:46,369 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 62 treesize of output 90 [2021-08-21 18:34:46,635 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:34:46,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 28 [2021-08-21 18:34:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:46,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839323966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:46,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:46,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 46 [2021-08-21 18:34:46,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859026638] [2021-08-21 18:34:46,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:34:46,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:34:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:34:46,659 INFO L87 Difference]: Start difference. First operand 4349 states and 8154 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:49,494 INFO L93 Difference]: Finished difference Result 6840 states and 12678 transitions. [2021-08-21 18:34:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 18:34:49,495 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 18:34:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:49,502 INFO L225 Difference]: With dead ends: 6840 [2021-08-21 18:34:49,502 INFO L226 Difference]: Without dead ends: 6767 [2021-08-21 18:34:49,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2873 ImplicationChecksByTransitivity, 2408.5ms TimeCoverageRelationStatistics Valid=980, Invalid=7030, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 18:34:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2021-08-21 18:34:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 4047. [2021-08-21 18:34:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 1.883835887296095) internal successors, (7622), 4046 states have internal predecessors, (7622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 7622 transitions. [2021-08-21 18:34:49,552 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 7622 transitions. Word has length 50 [2021-08-21 18:34:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:49,553 INFO L470 AbstractCegarLoop]: Abstraction has 4047 states and 7622 transitions. [2021-08-21 18:34:49,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 7622 transitions. [2021-08-21 18:34:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 18:34:49,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:49,559 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:49,583 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 18:34:49,780 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 18:34:49,780 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:34:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash 503913401, now seen corresponding path program 24 times [2021-08-21 18:34:49,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:49,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499217767] [2021-08-21 18:34:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:49,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 18:34:50,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:50,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499217767] [2021-08-21 18:34:50,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499217767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:50,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138695902] [2021-08-21 18:34:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:34:50,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:50,307 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 18:34:50,308 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 18:34:52,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:34:52,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:34:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:00,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:35:00,560 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 67 treesize of output 95 [2021-08-21 18:35:01,487 INFO L354 Elim1Store]: treesize reduction 81, result has 46.4 percent of original size [2021-08-21 18:35:01,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 99 [2021-08-21 18:35:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138695902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:02,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:02,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 44 [2021-08-21 18:35:02,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196625279] [2021-08-21 18:35:02,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:35:02,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:02,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:35:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1724, Unknown=1, NotChecked=0, Total=1980 [2021-08-21 18:35:02,330 INFO L87 Difference]: Start difference. First operand 4047 states and 7622 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:55,983 WARN L207 SmtUtils]: Spent 7.41 s on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-08-21 18:37:59,816 WARN L207 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-08-21 18:41:36,908 WARN L207 SmtUtils]: Spent 7.42 s on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-08-21 18:42:46,212 WARN L207 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-08-21 18:45:59,088 WARN L207 SmtUtils]: Spent 6.71 s on a formula simplification. DAG size of input: 62 DAG size of output: 57 Received shutdown request... [2021-08-21 18:46:38,758 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 18:46:38,759 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:46:39,790 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 18:46:39,793 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:46:39,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-21 18:46:39,793 WARN L594 AbstractCegarLoop]: Verification canceled: while executing Executor. [2021-08-21 18:46:39,794 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:46:39,794 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:46:39,797 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:46:39,797 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:46:39,798 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:46:39 BasicIcfg [2021-08-21 18:46:39,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:46:39,799 INFO L168 Benchmark]: Toolchain (without parser) took 867013.08 ms. Allocated memory was 205.5 MB in the beginning and 553.6 MB in the end (delta: 348.1 MB). Free memory was 185.4 MB in the beginning and 183.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 351.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,799 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.37 ms. Allocated memory is still 205.5 MB. Free memory was 186.5 MB in the beginning and 186.4 MB in the end (delta: 101.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:46:39,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 205.5 MB. Free memory was 185.3 MB in the beginning and 183.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:46:39,799 INFO L168 Benchmark]: Boogie Preprocessor took 13.86 ms. Allocated memory is still 205.5 MB. Free memory was 183.8 MB in the beginning and 182.8 MB in the end (delta: 933.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,799 INFO L168 Benchmark]: RCFGBuilder took 195.00 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 169.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,800 INFO L168 Benchmark]: TraceAbstraction took 866779.02 ms. Allocated memory was 205.5 MB in the beginning and 553.6 MB in the end (delta: 348.1 MB). Free memory was 169.0 MB in the beginning and 183.5 MB in the end (delta: -14.5 MB). Peak memory consumption was 334.3 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,810 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 0.37 ms. Allocated memory is still 205.5 MB. Free memory was 186.5 MB in the beginning and 186.4 MB in the end (delta: 101.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.31 ms. Allocated memory is still 205.5 MB. Free memory was 185.3 MB in the beginning and 183.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.86 ms. Allocated memory is still 205.5 MB. Free memory was 183.8 MB in the beginning and 182.8 MB in the end (delta: 933.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 195.00 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 169.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 866779.02 ms. Allocated memory was 205.5 MB in the beginning and 553.6 MB in the end (delta: 348.1 MB). Free memory was 169.0 MB in the beginning and 183.5 MB in the end (delta: -14.5 MB). Peak memory consumption was 334.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 77, positive: 60, positive conditional: 60, positive unconditional: 0, negative: 17, negative conditional: 17, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 62, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 62, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 62, positive: 57, positive conditional: 0, positive unconditional: 57, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 11, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 62, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 62, unknown conditional: 0, unknown unconditional: 62] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 15 - 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: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 866704.6ms, OverallIterations: 26, TraceHistogramMax: 4, EmptinessCheckTime: 60.0ms, AutomataDifference: 792119.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 77.1ms, PartialOrderReductionTime: 63.6ms, HoareTripleCheckerStatistics: 1194 SDtfs, 6347 SDslu, 13055 SDs, 0 SdLazy, 46124 SolverSat, 3509 SolverUnsat, 72 SolverUnknown, 0 SolverNotchecked, 255446.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2545 GetRequests, 727 SyntacticMatches, 26 SemanticMatches, 1792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66599 ImplicationChecksByTransitivity, 545011.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4349occurred in iteration=24, InterpolantAutomatonStates: 1240, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 596.0ms AutomataMinimizationTime, 25 MinimizatonAttempts, 24584 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 106.7ms SsaConstructionTime, 522.0ms SatisfiabilityAnalysisTime, 52492.2ms InterpolantComputationTime, 2070 NumberOfCodeBlocks, 2070 NumberOfCodeBlocksAsserted, 94 NumberOfCheckSat, 2020 ConstructedInterpolants, 453 QuantifiedInterpolants, 40580 SizeOfPredicates, 321 NumberOfNonLiveVariables, 2163 ConjunctsInSsa, 786 ConjunctsInUnsatCore, 50 InterpolantComputations, 2 PerfectInterpolantSequences, 267/1967 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