/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/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:31:07,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:31:07,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:31:07,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:31:07,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:31:07,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:31:07,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:31:07,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:31:07,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:31:07,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:31:07,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:31:07,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-06 20:31:07,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:31:07,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:31:07,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:31:07,757 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 [2021-08-06 20:31:07,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:31:07,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:31:07,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:31:07,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:31:07,794 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:31:07,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:31:07,795 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:31:07,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:31:07,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:31:07,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:31:07,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:31:07,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:31:07,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:31:07,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:31:07,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:31:07,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:31:07,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:31:07,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:31:07,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:31:07,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:31:07,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:31:07,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:31:07,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:31:07,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:31:07,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:31:07,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:31:07,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:31:07,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:31:07,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:31:07,800 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:31:07,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:31:08,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:31:08,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:31:08,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:31:08,175 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:31:08,176 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:31:08,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-08-06 20:31:08,178 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-08-06 20:31:08,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:31:08,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:31:08,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:31:08,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:31:08,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:31:08,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:31:08,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:31:08,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:31:08,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:31:08,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:31:08,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:31:08,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:31:08,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:31:08,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/1) ... [2021-08-06 20:31:08,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:31:08,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:08,304 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) [2021-08-06 20:31:08,327 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 [2021-08-06 20:31:08,355 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:31:08,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:31:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:31:08,356 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:31:08,356 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:31:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:31:08,357 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:31:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:31:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:31:08,357 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:31:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:31:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:31:08,358 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:31:08,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:31:08,543 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:31:08,544 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:31:08 BoogieIcfgContainer [2021-08-06 20:31:08,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:31:08,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:31:08,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:31:08,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:31:08,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:31:08" (1/2) ... [2021-08-06 20:31:08,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5211a290 and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:31:08, skipping insertion in model container [2021-08-06 20:31:08,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:31:08" (2/2) ... [2021-08-06 20:31:08,551 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-08-06 20:31:08,555 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:31:08,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:31:08,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:31:08,555 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:31:08,635 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:31:08,692 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:31:08,698 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 [2021-08-06 20:31:08,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:31:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:31:08,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:08,823 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:08,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:08,832 INFO L82 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2021-08-06 20:31:08,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:08,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710516118] [2021-08-06 20:31:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:08,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:09,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:09,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710516118] [2021-08-06 20:31:09,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710516118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:31:09,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:31:09,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:31:09,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748974547] [2021-08-06 20:31:09,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:31:09,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:31:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:31:09,114 INFO L87 Difference]: Start difference. First operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 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 6.0) 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) [2021-08-06 20:31:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:09,157 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-06 20:31:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:31:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) 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 [2021-08-06 20:31:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:09,167 INFO L225 Difference]: With dead ends: 217 [2021-08-06 20:31:09,168 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 20:31:09,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:31:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 20:31:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-08-06 20:31:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 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) [2021-08-06 20:31:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2021-08-06 20:31:09,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 18 [2021-08-06 20:31:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:09,237 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2021-08-06 20:31:09,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) 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) [2021-08-06 20:31:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2021-08-06 20:31:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:31:09,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:09,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:09,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:31:09,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:09,244 INFO L82 PathProgramCache]: Analyzing trace with hash -518877060, now seen corresponding path program 1 times [2021-08-06 20:31:09,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:09,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67394457] [2021-08-06 20:31:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:09,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:09,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:09,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67394457] [2021-08-06 20:31:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67394457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:31:09,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:31:09,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:31:09,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003841910] [2021-08-06 20:31:09,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:31:09,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:31:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:31:09,323 INFO L87 Difference]: Start difference. First operand 45 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:09,372 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-08-06 20:31:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:31:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:31:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:09,375 INFO L225 Difference]: With dead ends: 55 [2021-08-06 20:31:09,375 INFO L226 Difference]: Without dead ends: 55 [2021-08-06 20:31:09,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:31:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-06 20:31:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-08-06 20:31:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 80 transitions. [2021-08-06 20:31:09,387 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 80 transitions. Word has length 20 [2021-08-06 20:31:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:09,387 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 80 transitions. [2021-08-06 20:31:09,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 80 transitions. [2021-08-06 20:31:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:31:09,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:09,389 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:09,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:31:09,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:09,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:09,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1615051400, now seen corresponding path program 1 times [2021-08-06 20:31:09,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:09,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041578550] [2021-08-06 20:31:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:09,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:09,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:09,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041578550] [2021-08-06 20:31:09,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041578550] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:31:09,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:31:09,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:31:09,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481440208] [2021-08-06 20:31:09,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:31:09,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:09,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:31:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:31:09,469 INFO L87 Difference]: Start difference. First operand 48 states and 80 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:09,528 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2021-08-06 20:31:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:31:09,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:31:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:09,530 INFO L225 Difference]: With dead ends: 66 [2021-08-06 20:31:09,530 INFO L226 Difference]: Without dead ends: 66 [2021-08-06 20:31:09,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:31:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-06 20:31:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-06 20:31:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.75) internal successors, (98), 56 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-06 20:31:09,535 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-06 20:31:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:09,535 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-06 20:31:09,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-06 20:31:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:31:09,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:09,536 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:09,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:31:09,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash 12486490, now seen corresponding path program 1 times [2021-08-06 20:31:09,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:09,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369387024] [2021-08-06 20:31:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:09,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:09,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 81.0 percent of original size [2021-08-06 20:31:09,771 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 81.0 percent of original size [2021-08-06 20:31:09,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.1 percent of original size [2021-08-06 20:31:09,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.1 percent of original size [2021-08-06 20:31:10,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 86.1 percent of original size [2021-08-06 20:31:10,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 86.1 percent of original size [2021-08-06 20:31:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:10,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:10,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369387024] [2021-08-06 20:31:10,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369387024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:10,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883854864] [2021-08-06 20:31:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:10,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:10,165 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) [2021-08-06 20:31:10,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:31:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:10,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 20:31:10,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:10,944 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:31:10,944 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 49 treesize of output 40 [2021-08-06 20:31:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:11,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883854864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:11,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:11,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:31:11,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569345095] [2021-08-06 20:31:11,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:31:11,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:31:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:31:11,177 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:11,461 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-06 20:31:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:31:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:31:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:11,466 INFO L225 Difference]: With dead ends: 121 [2021-08-06 20:31:11,466 INFO L226 Difference]: Without dead ends: 116 [2021-08-06 20:31:11,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:31:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-06 20:31:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-06 20:31:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.864864864864865) internal successors, (138), 74 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-06 20:31:11,484 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-06 20:31:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:11,485 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-06 20:31:11,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-06 20:31:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:31:11,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:11,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:11,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:11,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:11,701 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1559898278, now seen corresponding path program 2 times [2021-08-06 20:31:11,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:11,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039631437] [2021-08-06 20:31:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:11,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:11,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 81.0 percent of original size [2021-08-06 20:31:11,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 81.0 percent of original size [2021-08-06 20:31:11,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 84.1 percent of original size [2021-08-06 20:31:11,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 84.1 percent of original size [2021-08-06 20:31:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:12,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:12,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039631437] [2021-08-06 20:31:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039631437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:12,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944565096] [2021-08-06 20:31:12,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:31:12,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:12,017 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) [2021-08-06 20:31:12,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:31:12,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:31:12,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:12,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:31:12,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:12,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:31:12,593 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 43 treesize of output 39 [2021-08-06 20:31:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:13,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944565096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:13,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:13,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 20:31:13,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614624089] [2021-08-06 20:31:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:31:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:31:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:31:13,141 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:13,778 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-06 20:31:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:31:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:31:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:13,779 INFO L225 Difference]: With dead ends: 159 [2021-08-06 20:31:13,779 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 20:31:13,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 636.8ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:31:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 20:31:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-06 20:31:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.881578947368421) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-06 20:31:13,784 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-06 20:31:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:13,786 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-06 20:31:13,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-06 20:31:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:31:13,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:13,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:13,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:13,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:13,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1733588454, now seen corresponding path program 3 times [2021-08-06 20:31:13,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:13,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086119741] [2021-08-06 20:31:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:13,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:14,117 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 81.0 percent of original size [2021-08-06 20:31:14,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 81.0 percent of original size [2021-08-06 20:31:14,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 73.6 percent of original size [2021-08-06 20:31:14,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 73.6 percent of original size [2021-08-06 20:31:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:14,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:14,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086119741] [2021-08-06 20:31:14,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086119741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:14,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556170479] [2021-08-06 20:31:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:31:14,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:14,281 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) [2021-08-06 20:31:14,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:31:14,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:31:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:31:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:14,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:31:14,829 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 43 treesize of output 39 [2021-08-06 20:31:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:15,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556170479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:15,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:15,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 20:31:15,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636810299] [2021-08-06 20:31:15,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:31:15,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:15,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:31:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:31:15,431 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:15,867 INFO L93 Difference]: Finished difference Result 134 states and 237 transitions. [2021-08-06 20:31:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:31:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:31:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:15,868 INFO L225 Difference]: With dead ends: 134 [2021-08-06 20:31:15,868 INFO L226 Difference]: Without dead ends: 129 [2021-08-06 20:31:15,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:31:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-06 20:31:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-08-06 20:31:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.8875) internal successors, (151), 80 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-06 20:31:15,873 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-06 20:31:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:15,873 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-06 20:31:15,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-06 20:31:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:15,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:15,874 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:15,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:16,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:16,081 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash 708303036, now seen corresponding path program 4 times [2021-08-06 20:31:16,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:16,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687574022] [2021-08-06 20:31:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:16,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:16,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:16,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687574022] [2021-08-06 20:31:16,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687574022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:16,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738602416] [2021-08-06 20:31:16,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:31:16,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:16,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:16,175 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) [2021-08-06 20:31:16,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:31:16,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:31:16,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:31:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:16,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:16,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738602416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:16,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:31:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900708007] [2021-08-06 20:31:16,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:31:16,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:31:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:31:16,608 INFO L87 Difference]: Start difference. First operand 81 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:16,798 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-06 20:31:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:31:16,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:16,800 INFO L225 Difference]: With dead ends: 192 [2021-08-06 20:31:16,800 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 20:31:16,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:31:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 20:31:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-06 20:31:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-06 20:31:16,812 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-06 20:31:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:16,814 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-06 20:31:16,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-06 20:31:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:16,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:16,816 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:16,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:17,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:17,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash -783191876, now seen corresponding path program 5 times [2021-08-06 20:31:17,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:17,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571674524] [2021-08-06 20:31:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:17,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:17,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:17,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571674524] [2021-08-06 20:31:17,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571674524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:17,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262051706] [2021-08-06 20:31:17,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:31:17,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:17,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:17,125 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) [2021-08-06 20:31:17,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:31:17,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:31:17,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:31:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:17,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:17,562 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262051706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:17,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:17,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:31:17,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082042891] [2021-08-06 20:31:17,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:31:17,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:31:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:31:17,592 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:17,978 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-06 20:31:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:31:17,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:17,980 INFO L225 Difference]: With dead ends: 254 [2021-08-06 20:31:17,980 INFO L226 Difference]: Without dead ends: 254 [2021-08-06 20:31:17,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:31:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-06 20:31:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-06 20:31:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-06 20:31:17,985 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-06 20:31:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:17,985 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-06 20:31:17,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-06 20:31:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:17,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:17,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:18,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:18,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:18,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1401497400, now seen corresponding path program 1 times [2021-08-06 20:31:18,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:18,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297483823] [2021-08-06 20:31:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:18,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:18,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:18,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297483823] [2021-08-06 20:31:18,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297483823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:18,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393257088] [2021-08-06 20:31:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:18,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:18,260 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) [2021-08-06 20:31:18,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:31:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:18,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:31:18,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:18,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:31:18,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:31:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:18,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393257088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:18,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:18,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:31:18,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163018282] [2021-08-06 20:31:18,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:31:18,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:31:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:31:18,686 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:18,756 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-06 20:31:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:31:18,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:18,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:18,758 INFO L225 Difference]: With dead ends: 206 [2021-08-06 20:31:18,758 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 20:31:18,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:31:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 20:31:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-06 20:31:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 146 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-06 20:31:18,764 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-06 20:31:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:18,764 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-06 20:31:18,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-06 20:31:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:18,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:18,765 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:18,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:18,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:18,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash -448250184, now seen corresponding path program 6 times [2021-08-06 20:31:18,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:18,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229524610] [2021-08-06 20:31:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:18,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:19,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:19,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229524610] [2021-08-06 20:31:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229524610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:19,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137719272] [2021-08-06 20:31:19,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:31:19,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:19,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:19,034 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) [2021-08-06 20:31:19,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:31:19,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:31:19,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:19,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:31:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:19,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137719272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:19,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:19,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:31:19,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940776341] [2021-08-06 20:31:19,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:31:19,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:31:19,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:31:19,498 INFO L87 Difference]: Start difference. First operand 147 states and 301 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:19,621 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-06 20:31:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:31:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:19,622 INFO L225 Difference]: With dead ends: 230 [2021-08-06 20:31:19,623 INFO L226 Difference]: Without dead ends: 218 [2021-08-06 20:31:19,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:31:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-06 20:31:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-06 20:31:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.043956043956044) internal successors, (372), 182 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-06 20:31:19,628 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-06 20:31:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:19,628 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-06 20:31:19,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-06 20:31:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:19,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:19,629 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:19,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:19,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:19,849 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:19,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:19,849 INFO L82 PathProgramCache]: Analyzing trace with hash 605470520, now seen corresponding path program 2 times [2021-08-06 20:31:19,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:19,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98402514] [2021-08-06 20:31:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:19,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:19,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:19,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98402514] [2021-08-06 20:31:19,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98402514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:19,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456331388] [2021-08-06 20:31:19,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:31:19,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:19,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:19,903 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) [2021-08-06 20:31:19,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:31:20,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:31:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:31:20,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:20,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:20,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:20,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456331388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:20,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:20,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:31:20,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444320191] [2021-08-06 20:31:20,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:31:20,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:31:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:31:20,315 INFO L87 Difference]: Start difference. First operand 183 states and 372 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:20,403 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-06 20:31:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:31:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:20,405 INFO L225 Difference]: With dead ends: 221 [2021-08-06 20:31:20,405 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 20:31:20,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:31:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 20:31:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-06 20:31:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0058823529411764) internal successors, (341), 170 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-06 20:31:20,413 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-06 20:31:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:20,414 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-06 20:31:20,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-06 20:31:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:20,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:20,417 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:20,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:20,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 20:31:20,641 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash 60653496, now seen corresponding path program 7 times [2021-08-06 20:31:20,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:20,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992695098] [2021-08-06 20:31:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:20,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:20,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:20,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992695098] [2021-08-06 20:31:20,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992695098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:20,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897390918] [2021-08-06 20:31:20,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:31:20,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:20,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:20,715 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) [2021-08-06 20:31:20,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:31:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:31:20,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:21,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:21,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897390918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:21,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:21,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:31:21,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82146946] [2021-08-06 20:31:21,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:31:21,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:31:21,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:31:21,203 INFO L87 Difference]: Start difference. First operand 171 states and 341 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:21,779 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-06 20:31:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:31:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:21,782 INFO L225 Difference]: With dead ends: 577 [2021-08-06 20:31:21,782 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 20:31:21,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:31:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 20:31:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-06 20:31:21,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0549450549450547) internal successors, (374), 182 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-06 20:31:21,792 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-06 20:31:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:21,792 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-06 20:31:21,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-06 20:31:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:21,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:21,793 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:21,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:22,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:22,009 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash 318475960, now seen corresponding path program 8 times [2021-08-06 20:31:22,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:22,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845800695] [2021-08-06 20:31:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:22,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:22,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:22,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845800695] [2021-08-06 20:31:22,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845800695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:22,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810235031] [2021-08-06 20:31:22,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:31:22,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:22,075 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) [2021-08-06 20:31:22,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:31:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:31:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:22,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:31:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:22,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810235031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:22,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:22,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:31:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318821148] [2021-08-06 20:31:22,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:31:22,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:31:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:31:22,558 INFO L87 Difference]: Start difference. First operand 183 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:22,763 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-06 20:31:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:31:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:22,766 INFO L225 Difference]: With dead ends: 355 [2021-08-06 20:31:22,766 INFO L226 Difference]: Without dead ends: 351 [2021-08-06 20:31:22,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:31:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-06 20:31:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-06 20:31:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1171548117154813) internal successors, (506), 239 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-06 20:31:22,783 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-06 20:31:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:22,784 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-06 20:31:22,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-06 20:31:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:22,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:22,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:22,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:23,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 20:31:23,011 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1253908808, now seen corresponding path program 9 times [2021-08-06 20:31:23,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:23,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031004737] [2021-08-06 20:31:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:23,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:23,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:23,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031004737] [2021-08-06 20:31:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031004737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:23,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477060623] [2021-08-06 20:31:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:31:23,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:23,071 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) [2021-08-06 20:31:23,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:31:23,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:31:23,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:23,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:31:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:23,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477060623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:23,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:23,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:31:23,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204505620] [2021-08-06 20:31:23,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:31:23,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:31:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:31:23,537 INFO L87 Difference]: Start difference. First operand 240 states and 506 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:23,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:23,806 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-06 20:31:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:31:23,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:23,808 INFO L225 Difference]: With dead ends: 370 [2021-08-06 20:31:23,808 INFO L226 Difference]: Without dead ends: 370 [2021-08-06 20:31:23,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:31:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-06 20:31:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-06 20:31:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0952380952380953) internal successors, (528), 252 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-06 20:31:23,816 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-06 20:31:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:23,816 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-06 20:31:23,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-06 20:31:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:23,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:23,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:23,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 20:31:24,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 20:31:24,037 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 351717368, now seen corresponding path program 3 times [2021-08-06 20:31:24,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:24,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231192330] [2021-08-06 20:31:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:24,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:24,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:24,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231192330] [2021-08-06 20:31:24,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231192330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:24,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740871927] [2021-08-06 20:31:24,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:31:24,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:24,098 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) [2021-08-06 20:31:24,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:31:24,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:31:24,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:24,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:31:24,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:24,482 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:24,483 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:31:24,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740871927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:24,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:24,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:31:24,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036833008] [2021-08-06 20:31:24,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:31:24,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:24,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:31:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:31:24,539 INFO L87 Difference]: Start difference. First operand 253 states and 528 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:24,626 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-06 20:31:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:31:24,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:24,628 INFO L225 Difference]: With dead ends: 273 [2021-08-06 20:31:24,628 INFO L226 Difference]: Without dead ends: 273 [2021-08-06 20:31:24,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:31:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-06 20:31:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-06 20:31:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1293103448275863) internal successors, (494), 232 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-06 20:31:24,636 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-06 20:31:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:24,636 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-06 20:31:24,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-06 20:31:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:31:24,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:24,641 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:24,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:24,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 20:31:24,845 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:24,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash 648118904, now seen corresponding path program 10 times [2021-08-06 20:31:24,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:24,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967164802] [2021-08-06 20:31:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:24,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:24,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:24,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967164802] [2021-08-06 20:31:24,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967164802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:24,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835379879] [2021-08-06 20:31:24,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:31:24,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:24,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:24,903 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) [2021-08-06 20:31:24,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:31:25,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:31:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:31:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:25,375 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:25,376 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:31:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:25,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835379879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:25,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:25,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:31:25,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229783275] [2021-08-06 20:31:25,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:31:25,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:31:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:31:25,398 INFO L87 Difference]: Start difference. First operand 233 states and 494 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:25,731 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-06 20:31:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:31:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:31:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:25,735 INFO L225 Difference]: With dead ends: 604 [2021-08-06 20:31:25,735 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 20:31:25,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:31:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 20:31:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-06 20:31:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1702127659574466) internal successors, (612), 282 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-06 20:31:25,746 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-06 20:31:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:25,746 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-06 20:31:25,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-06 20:31:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:31:25,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:25,748 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:25,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:25,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 20:31:25,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:25,971 INFO L82 PathProgramCache]: Analyzing trace with hash 66299930, now seen corresponding path program 4 times [2021-08-06 20:31:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:25,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462410501] [2021-08-06 20:31:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:25,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:26,162 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 167, result has 41.0 percent of original size [2021-08-06 20:31:26,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 167, result has 41.0 percent of original size [2021-08-06 20:31:26,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 74.5 percent of original size [2021-08-06 20:31:26,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 74.5 percent of original size [2021-08-06 20:31:26,406 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 76.2 percent of original size [2021-08-06 20:31:26,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 76.2 percent of original size [2021-08-06 20:31:26,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 63.7 percent of original size [2021-08-06 20:31:26,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 63.7 percent of original size [2021-08-06 20:31:26,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 50.0 percent of original size [2021-08-06 20:31:26,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 50.0 percent of original size [2021-08-06 20:31:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:26,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:26,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462410501] [2021-08-06 20:31:26,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462410501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:26,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627441241] [2021-08-06 20:31:26,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:31:26,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:26,687 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) [2021-08-06 20:31:26,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:31:27,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:31:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:31:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:28,283 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:31:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:31:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:28,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627441241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:28,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:28,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:31:28,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802357505] [2021-08-06 20:31:28,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:31:28,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:28,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:31:28,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:31:28,816 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:29,493 INFO L93 Difference]: Finished difference Result 423 states and 858 transitions. [2021-08-06 20:31:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:31:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:31:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:29,496 INFO L225 Difference]: With dead ends: 423 [2021-08-06 20:31:29,496 INFO L226 Difference]: Without dead ends: 418 [2021-08-06 20:31:29,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 906.1ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:31:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-06 20:31:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 292. [2021-08-06 20:31:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.178694158075601) internal successors, (634), 291 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-06 20:31:29,507 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-06 20:31:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:29,507 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-06 20:31:29,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-06 20:31:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:31:29,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:29,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:29,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:29,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:29,732 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash 320089054, now seen corresponding path program 5 times [2021-08-06 20:31:29,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:29,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533192306] [2021-08-06 20:31:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:29,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:29,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 147, result has 42.4 percent of original size [2021-08-06 20:31:29,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 147, result has 42.4 percent of original size [2021-08-06 20:31:30,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 85.2 percent of original size [2021-08-06 20:31:30,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 85.2 percent of original size [2021-08-06 20:31:30,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 84.7 percent of original size [2021-08-06 20:31:30,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 84.7 percent of original size [2021-08-06 20:31:30,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 70.3 percent of original size [2021-08-06 20:31:30,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 70.3 percent of original size [2021-08-06 20:31:30,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 65.5 percent of original size [2021-08-06 20:31:30,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 65.5 percent of original size [2021-08-06 20:31:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:30,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533192306] [2021-08-06 20:31:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533192306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359592400] [2021-08-06 20:31:30,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:31:30,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:30,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:30,411 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) [2021-08-06 20:31:30,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:31:30,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:31:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:31:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:31,960 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:31:31,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:31:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:32,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359592400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:32,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:32,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:31:32,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107376566] [2021-08-06 20:31:32,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:31:32,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:31:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:31:32,653 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:33,947 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-06 20:31:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:31:33,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:31:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:33,950 INFO L225 Difference]: With dead ends: 415 [2021-08-06 20:31:33,950 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 20:31:33,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1444.8ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:31:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 20:31:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-06 20:31:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.169491525423729) internal successors, (640), 295 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-06 20:31:33,958 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-06 20:31:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:33,958 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-06 20:31:33,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-06 20:31:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:31:33,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:33,960 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:33,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 20:31:34,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:31:34,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:34,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1783447654, now seen corresponding path program 11 times [2021-08-06 20:31:34,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:34,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678931626] [2021-08-06 20:31:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:34,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:34,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 120, result has 25.5 percent of original size [2021-08-06 20:31:34,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 120, result has 25.5 percent of original size [2021-08-06 20:31:34,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 47.3 percent of original size [2021-08-06 20:31:34,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 47.3 percent of original size [2021-08-06 20:31:34,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 48.7 percent of original size [2021-08-06 20:31:34,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 48.7 percent of original size [2021-08-06 20:31:34,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 67.2 percent of original size [2021-08-06 20:31:34,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 67.2 percent of original size [2021-08-06 20:31:34,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 68.4 percent of original size [2021-08-06 20:31:34,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 68.4 percent of original size [2021-08-06 20:31:34,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 90.6 percent of original size [2021-08-06 20:31:34,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 90.6 percent of original size [2021-08-06 20:31:35,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 71.7 percent of original size [2021-08-06 20:31:35,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 71.7 percent of original size [2021-08-06 20:31:35,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 68.8 percent of original size [2021-08-06 20:31:35,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 68.8 percent of original size [2021-08-06 20:31:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:35,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:35,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678931626] [2021-08-06 20:31:35,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678931626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:35,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013879188] [2021-08-06 20:31:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:31:35,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:35,094 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) [2021-08-06 20:31:35,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:31:35,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:31:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:31:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:36,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:31:36,785 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 20:31:36,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-06 20:31:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:37,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013879188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:37,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:37,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:31:37,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892381488] [2021-08-06 20:31:37,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:31:37,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:31:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:31:37,022 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:39,016 INFO L93 Difference]: Finished difference Result 351 states and 718 transitions. [2021-08-06 20:31:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:31:39,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:31:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:39,018 INFO L225 Difference]: With dead ends: 351 [2021-08-06 20:31:39,018 INFO L226 Difference]: Without dead ends: 346 [2021-08-06 20:31:39,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2212.5ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:31:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-06 20:31:39,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 304. [2021-08-06 20:31:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-06 20:31:39,026 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-06 20:31:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:39,026 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-06 20:31:39,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-06 20:31:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:31:39,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:39,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:39,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:39,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:39,245 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:39,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1596416026, now seen corresponding path program 6 times [2021-08-06 20:31:39,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:39,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269128794] [2021-08-06 20:31:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:39,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:39,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 150, result has 41.9 percent of original size [2021-08-06 20:31:39,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 150, result has 41.9 percent of original size [2021-08-06 20:31:39,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 85.2 percent of original size [2021-08-06 20:31:39,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 85.2 percent of original size [2021-08-06 20:31:39,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 84.7 percent of original size [2021-08-06 20:31:39,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 84.7 percent of original size [2021-08-06 20:31:39,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 81.1 percent of original size [2021-08-06 20:31:39,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 81.1 percent of original size [2021-08-06 20:31:39,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 65.5 percent of original size [2021-08-06 20:31:39,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 65.5 percent of original size [2021-08-06 20:31:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:39,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:39,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269128794] [2021-08-06 20:31:39,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269128794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:39,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309723506] [2021-08-06 20:31:39,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:31:39,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:39,933 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) [2021-08-06 20:31:39,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:31:40,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:31:40,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:31:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:41,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:31:41,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:31:41,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:31:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:42,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309723506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:42,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:42,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:31:42,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454866036] [2021-08-06 20:31:42,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:31:42,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:31:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:31:42,520 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:45,239 INFO L93 Difference]: Finished difference Result 508 states and 997 transitions. [2021-08-06 20:31:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:31:45,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:31:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:45,241 INFO L225 Difference]: With dead ends: 508 [2021-08-06 20:31:45,241 INFO L226 Difference]: Without dead ends: 503 [2021-08-06 20:31:45,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2591.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:31:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-06 20:31:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 310. [2021-08-06 20:31:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.168284789644013) internal successors, (670), 309 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 670 transitions. [2021-08-06 20:31:45,249 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 670 transitions. Word has length 26 [2021-08-06 20:31:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:45,250 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 670 transitions. [2021-08-06 20:31:45,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 670 transitions. [2021-08-06 20:31:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:31:45,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:45,251 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:45,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:45,473 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash -729726950, now seen corresponding path program 7 times [2021-08-06 20:31:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:45,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101425602] [2021-08-06 20:31:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:45,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:45,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 90.2 percent of original size [2021-08-06 20:31:45,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 90.2 percent of original size [2021-08-06 20:31:45,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 90.9 percent of original size [2021-08-06 20:31:45,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 90.9 percent of original size [2021-08-06 20:31:45,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 81.7 percent of original size [2021-08-06 20:31:45,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 81.7 percent of original size [2021-08-06 20:31:45,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 20:31:45,905 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 20:31:45,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.9 percent of original size [2021-08-06 20:31:45,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.9 percent of original size [2021-08-06 20:31:45,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 42.5 percent of original size [2021-08-06 20:31:45,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 42.5 percent of original size [2021-08-06 20:31:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:46,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:46,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101425602] [2021-08-06 20:31:46,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101425602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:46,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477125044] [2021-08-06 20:31:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:31:46,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:46,021 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) [2021-08-06 20:31:46,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:31:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:31:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:47,915 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:31:47,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:31:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477125044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:48,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:48,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:31:48,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154837150] [2021-08-06 20:31:48,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:31:48,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:31:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:31:48,409 INFO L87 Difference]: Start difference. First operand 310 states and 670 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:50,710 INFO L93 Difference]: Finished difference Result 576 states and 1143 transitions. [2021-08-06 20:31:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:31:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:31:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:50,713 INFO L225 Difference]: With dead ends: 576 [2021-08-06 20:31:50,713 INFO L226 Difference]: Without dead ends: 571 [2021-08-06 20:31:50,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2226.2ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:31:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-06 20:31:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 322. [2021-08-06 20:31:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.1806853582554515) internal successors, (700), 321 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 700 transitions. [2021-08-06 20:31:50,722 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 700 transitions. Word has length 26 [2021-08-06 20:31:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:50,723 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 700 transitions. [2021-08-06 20:31:50,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 700 transitions. [2021-08-06 20:31:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:31:50,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:50,724 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:50,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 20:31:50,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:50,929 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:50,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1992855578, now seen corresponding path program 8 times [2021-08-06 20:31:50,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:50,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877478311] [2021-08-06 20:31:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:50,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:51,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 72.2 percent of original size [2021-08-06 20:31:51,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 72.2 percent of original size [2021-08-06 20:31:51,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 311, result has 35.6 percent of original size [2021-08-06 20:31:51,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 311, result has 35.6 percent of original size [2021-08-06 20:31:51,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 320, result has 34.0 percent of original size [2021-08-06 20:31:51,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 320, result has 34.0 percent of original size [2021-08-06 20:31:51,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 91.3 percent of original size [2021-08-06 20:31:51,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 91.3 percent of original size [2021-08-06 20:31:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:51,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:51,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877478311] [2021-08-06 20:31:51,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877478311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:51,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586289512] [2021-08-06 20:31:51,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:31:51,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:51,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:51,597 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) [2021-08-06 20:31:51,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:31:52,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:31:52,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:31:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:31:53,298 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:31:53,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:31:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:54,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586289512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:54,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:31:54,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:31:54,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685481273] [2021-08-06 20:31:54,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:31:54,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:31:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:31:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:31:54,559 INFO L87 Difference]: Start difference. First operand 322 states and 700 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:31:56,750 INFO L93 Difference]: Finished difference Result 583 states and 1176 transitions. [2021-08-06 20:31:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:31:56,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:31:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:31:56,754 INFO L225 Difference]: With dead ends: 583 [2021-08-06 20:31:56,754 INFO L226 Difference]: Without dead ends: 578 [2021-08-06 20:31:56,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2191.2ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:31:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-06 20:31:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 323. [2021-08-06 20:31:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.1770186335403725) internal successors, (701), 322 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 701 transitions. [2021-08-06 20:31:56,764 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 701 transitions. Word has length 26 [2021-08-06 20:31:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:31:56,764 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 701 transitions. [2021-08-06 20:31:56,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:31:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 701 transitions. [2021-08-06 20:31:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:31:56,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:31:56,765 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:31:56,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:31:56,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:56,989 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:31:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:31:56,989 INFO L82 PathProgramCache]: Analyzing trace with hash -121398562, now seen corresponding path program 9 times [2021-08-06 20:31:56,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:31:56,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528230836] [2021-08-06 20:31:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:31:56,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:31:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:31:57,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 89.8 percent of original size [2021-08-06 20:31:57,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 89.8 percent of original size [2021-08-06 20:31:57,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 82.0 percent of original size [2021-08-06 20:31:57,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 82.0 percent of original size [2021-08-06 20:31:57,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 74.3 percent of original size [2021-08-06 20:31:57,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 74.3 percent of original size [2021-08-06 20:31:57,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 72.0 percent of original size [2021-08-06 20:31:57,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 72.0 percent of original size [2021-08-06 20:31:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:31:57,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:31:57,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528230836] [2021-08-06 20:31:57,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528230836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:31:57,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376613915] [2021-08-06 20:31:57,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:31:57,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:31:57,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:31:57,784 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) [2021-08-06 20:31:57,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:31:58,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:31:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:31:58,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:31:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:00,215 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:32:00,215 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 120 treesize of output 102 [2021-08-06 20:32:01,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 91.4 percent of original size [2021-08-06 20:32:01,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 91.4 percent of original size [2021-08-06 20:32:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:02,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376613915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:02,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:02,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:02,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273344349] [2021-08-06 20:32:02,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:02,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:02,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:02,567 INFO L87 Difference]: Start difference. First operand 323 states and 701 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:03,854 INFO L93 Difference]: Finished difference Result 483 states and 984 transitions. [2021-08-06 20:32:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:32:03,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:03,856 INFO L225 Difference]: With dead ends: 483 [2021-08-06 20:32:03,856 INFO L226 Difference]: Without dead ends: 478 [2021-08-06 20:32:03,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1463.6ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:32:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-08-06 20:32:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 324. [2021-08-06 20:32:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1733746130030958) internal successors, (702), 323 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 702 transitions. [2021-08-06 20:32:03,864 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 702 transitions. Word has length 26 [2021-08-06 20:32:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:03,865 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 702 transitions. [2021-08-06 20:32:03,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 702 transitions. [2021-08-06 20:32:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:03,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:03,866 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:03,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:04,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 20:32:04,081 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1016721510, now seen corresponding path program 12 times [2021-08-06 20:32:04,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:04,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758762595] [2021-08-06 20:32:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:04,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:04,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 114, result has 27.8 percent of original size [2021-08-06 20:32:04,177 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 114, result has 27.8 percent of original size [2021-08-06 20:32:04,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 57.3 percent of original size [2021-08-06 20:32:04,229 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 57.3 percent of original size [2021-08-06 20:32:04,320 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 57.9 percent of original size [2021-08-06 20:32:04,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 57.9 percent of original size [2021-08-06 20:32:04,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 65.3 percent of original size [2021-08-06 20:32:04,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 65.3 percent of original size [2021-08-06 20:32:04,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 65.5 percent of original size [2021-08-06 20:32:04,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 65.5 percent of original size [2021-08-06 20:32:04,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 59.5 percent of original size [2021-08-06 20:32:04,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 59.5 percent of original size [2021-08-06 20:32:04,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 53.1 percent of original size [2021-08-06 20:32:04,747 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 53.1 percent of original size [2021-08-06 20:32:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:04,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:04,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758762595] [2021-08-06 20:32:04,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758762595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:04,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758349699] [2021-08-06 20:32:04,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:32:04,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:04,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:04,772 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) [2021-08-06 20:32:04,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:32:05,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:32:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:32:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:08,168 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-08-06 20:32:08,169 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 126 treesize of output 119 [2021-08-06 20:32:09,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 94, result has 25.4 percent of original size [2021-08-06 20:32:09,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 94, result has 25.4 percent of original size [2021-08-06 20:32:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:09,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758349699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:09,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:09,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 20:32:09,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948085778] [2021-08-06 20:32:09,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:32:09,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:32:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:32:09,411 INFO L87 Difference]: Start difference. First operand 324 states and 702 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:13,786 INFO L93 Difference]: Finished difference Result 418 states and 837 transitions. [2021-08-06 20:32:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:32:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:13,788 INFO L225 Difference]: With dead ends: 418 [2021-08-06 20:32:13,788 INFO L226 Difference]: Without dead ends: 413 [2021-08-06 20:32:13,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 4354.7ms TimeCoverageRelationStatistics Valid=476, Invalid=2604, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:32:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-06 20:32:13,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 324. [2021-08-06 20:32:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.1733746130030958) internal successors, (702), 323 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 702 transitions. [2021-08-06 20:32:13,796 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 702 transitions. Word has length 26 [2021-08-06 20:32:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:13,796 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 702 transitions. [2021-08-06 20:32:13,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 702 transitions. [2021-08-06 20:32:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:13,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:13,797 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:13,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:14,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 20:32:14,021 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1786750874, now seen corresponding path program 13 times [2021-08-06 20:32:14,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:14,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142899756] [2021-08-06 20:32:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:14,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:14,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 69.2 percent of original size [2021-08-06 20:32:14,110 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 69.2 percent of original size [2021-08-06 20:32:14,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 67.0 percent of original size [2021-08-06 20:32:14,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 67.0 percent of original size [2021-08-06 20:32:14,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 68.7 percent of original size [2021-08-06 20:32:14,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 68.7 percent of original size [2021-08-06 20:32:14,271 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 88.8 percent of original size [2021-08-06 20:32:14,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 88.8 percent of original size [2021-08-06 20:32:14,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 85.0 percent of original size [2021-08-06 20:32:14,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 85.0 percent of original size [2021-08-06 20:32:14,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:32:14,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 82.9 percent of original size [2021-08-06 20:32:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:14,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:14,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142899756] [2021-08-06 20:32:14,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142899756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:14,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294529007] [2021-08-06 20:32:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:32:14,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:14,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:14,665 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) [2021-08-06 20:32:14,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:32:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:32:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:16,841 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:32:16,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 20:32:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:17,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294529007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:17,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:17,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:32:17,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667654509] [2021-08-06 20:32:17,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:32:17,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:32:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:17,134 INFO L87 Difference]: Start difference. First operand 324 states and 702 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:21,243 INFO L93 Difference]: Finished difference Result 642 states and 1253 transitions. [2021-08-06 20:32:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:32:21,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:21,245 INFO L225 Difference]: With dead ends: 642 [2021-08-06 20:32:21,245 INFO L226 Difference]: Without dead ends: 627 [2021-08-06 20:32:21,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 4036.9ms TimeCoverageRelationStatistics Valid=562, Invalid=2860, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:32:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-08-06 20:32:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2021-08-06 20:32:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-08-06 20:32:21,266 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 26 [2021-08-06 20:32:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-08-06 20:32:21,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-08-06 20:32:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:21,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:21,269 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:21,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:21,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:21,482 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1705861018, now seen corresponding path program 14 times [2021-08-06 20:32:21,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:21,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075875127] [2021-08-06 20:32:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:21,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:21,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 73.1 percent of original size [2021-08-06 20:32:21,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 73.1 percent of original size [2021-08-06 20:32:21,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 67.1 percent of original size [2021-08-06 20:32:21,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 67.1 percent of original size [2021-08-06 20:32:21,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 68.0 percent of original size [2021-08-06 20:32:21,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 68.0 percent of original size [2021-08-06 20:32:21,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 76.7 percent of original size [2021-08-06 20:32:21,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 76.7 percent of original size [2021-08-06 20:32:21,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 80.2 percent of original size [2021-08-06 20:32:21,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 80.2 percent of original size [2021-08-06 20:32:22,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 80.5 percent of original size [2021-08-06 20:32:22,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 80.5 percent of original size [2021-08-06 20:32:22,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.0 percent of original size [2021-08-06 20:32:22,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.0 percent of original size [2021-08-06 20:32:22,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 56.4 percent of original size [2021-08-06 20:32:22,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 56.4 percent of original size [2021-08-06 20:32:22,187 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 20:32:22,189 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 20:32:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:22,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:22,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075875127] [2021-08-06 20:32:22,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075875127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:22,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937544250] [2021-08-06 20:32:22,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:22,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:22,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:22,217 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) [2021-08-06 20:32:22,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:32:23,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:32:23,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:32:24,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:32:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:32:24,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:32:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 100 [2021-08-06 20:32:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:25,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937544250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:25,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:25,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-06 20:32:25,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570615104] [2021-08-06 20:32:25,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:32:25,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:32:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:32:25,569 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:30,092 INFO L93 Difference]: Finished difference Result 723 states and 1408 transitions. [2021-08-06 20:32:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 20:32:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:30,094 INFO L225 Difference]: With dead ends: 723 [2021-08-06 20:32:30,094 INFO L226 Difference]: Without dead ends: 703 [2021-08-06 20:32:30,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 4379.4ms TimeCoverageRelationStatistics Valid=776, Invalid=2884, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 20:32:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-08-06 20:32:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 343. [2021-08-06 20:32:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.190058479532164) internal successors, (749), 342 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 749 transitions. [2021-08-06 20:32:30,104 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 749 transitions. Word has length 26 [2021-08-06 20:32:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:30,104 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 749 transitions. [2021-08-06 20:32:30,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 749 transitions. [2021-08-06 20:32:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:30,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:30,105 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:30,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:30,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:30,321 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash -983480102, now seen corresponding path program 10 times [2021-08-06 20:32:30,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:30,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744800017] [2021-08-06 20:32:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:30,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:30,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 84.2 percent of original size [2021-08-06 20:32:30,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 84.2 percent of original size [2021-08-06 20:32:30,539 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 84.0 percent of original size [2021-08-06 20:32:30,552 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 84.0 percent of original size [2021-08-06 20:32:30,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 91.2 percent of original size [2021-08-06 20:32:30,642 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 91.2 percent of original size [2021-08-06 20:32:30,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 88.3 percent of original size [2021-08-06 20:32:30,743 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 88.3 percent of original size [2021-08-06 20:32:30,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.5 percent of original size [2021-08-06 20:32:30,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.5 percent of original size [2021-08-06 20:32:30,862 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 74.0 percent of original size [2021-08-06 20:32:30,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 74.0 percent of original size [2021-08-06 20:32:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:30,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:30,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744800017] [2021-08-06 20:32:30,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744800017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:30,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167574788] [2021-08-06 20:32:30,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:30,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:30,902 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) [2021-08-06 20:32:30,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:32:32,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:32,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:32,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:32:32,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:33,391 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:33,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:33,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167574788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:33,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:33,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686934460] [2021-08-06 20:32:33,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:33,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:33,857 INFO L87 Difference]: Start difference. First operand 343 states and 749 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:34,543 INFO L93 Difference]: Finished difference Result 476 states and 993 transitions. [2021-08-06 20:32:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:32:34,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:34,545 INFO L225 Difference]: With dead ends: 476 [2021-08-06 20:32:34,545 INFO L226 Difference]: Without dead ends: 471 [2021-08-06 20:32:34,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:32:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-06 20:32:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 351. [2021-08-06 20:32:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.1857142857142855) internal successors, (765), 350 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 765 transitions. [2021-08-06 20:32:34,552 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 765 transitions. Word has length 26 [2021-08-06 20:32:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:34,553 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 765 transitions. [2021-08-06 20:32:34,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 765 transitions. [2021-08-06 20:32:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:34,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:34,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:34,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 20:32:34,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 20:32:34,761 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1739102426, now seen corresponding path program 11 times [2021-08-06 20:32:34,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:34,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755984883] [2021-08-06 20:32:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:34,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:34,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 60.0 percent of original size [2021-08-06 20:32:34,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 60.0 percent of original size [2021-08-06 20:32:34,938 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 59.3 percent of original size [2021-08-06 20:32:34,946 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 59.3 percent of original size [2021-08-06 20:32:34,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 67.6 percent of original size [2021-08-06 20:32:35,001 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 67.6 percent of original size [2021-08-06 20:32:35,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.3 percent of original size [2021-08-06 20:32:35,102 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.3 percent of original size [2021-08-06 20:32:35,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.2 percent of original size [2021-08-06 20:32:35,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.2 percent of original size [2021-08-06 20:32:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:35,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:35,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755984883] [2021-08-06 20:32:35,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755984883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:35,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111370917] [2021-08-06 20:32:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:35,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:35,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:35,209 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:35,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:32:36,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:36,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:36,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:32:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:37,547 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:32:37,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 20:32:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:38,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111370917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:38,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:38,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:32:38,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403271395] [2021-08-06 20:32:38,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:32:38,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:32:38,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:38,817 INFO L87 Difference]: Start difference. First operand 351 states and 765 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:40,701 INFO L93 Difference]: Finished difference Result 548 states and 1124 transitions. [2021-08-06 20:32:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:32:40,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:40,703 INFO L225 Difference]: With dead ends: 548 [2021-08-06 20:32:40,703 INFO L226 Difference]: Without dead ends: 543 [2021-08-06 20:32:40,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1833.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:32:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-06 20:32:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 353. [2021-08-06 20:32:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.1875) internal successors, (770), 352 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 770 transitions. [2021-08-06 20:32:40,709 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 770 transitions. Word has length 26 [2021-08-06 20:32:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:40,709 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 770 transitions. [2021-08-06 20:32:40,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 770 transitions. [2021-08-06 20:32:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:40,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:40,711 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:40,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 20:32:40,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 20:32:40,937 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2052596322, now seen corresponding path program 12 times [2021-08-06 20:32:40,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:40,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324868225] [2021-08-06 20:32:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:40,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:41,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 77.5 percent of original size [2021-08-06 20:32:41,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 77.5 percent of original size [2021-08-06 20:32:41,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 77.1 percent of original size [2021-08-06 20:32:41,188 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 77.1 percent of original size [2021-08-06 20:32:41,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 66.7 percent of original size [2021-08-06 20:32:41,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 66.7 percent of original size [2021-08-06 20:32:41,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 66.7 percent of original size [2021-08-06 20:32:41,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 66.7 percent of original size [2021-08-06 20:32:41,361 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 31.0 percent of original size [2021-08-06 20:32:41,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 31.0 percent of original size [2021-08-06 20:32:41,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 28.1 percent of original size [2021-08-06 20:32:41,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 28.1 percent of original size [2021-08-06 20:32:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:41,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:41,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324868225] [2021-08-06 20:32:41,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324868225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:41,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097852284] [2021-08-06 20:32:41,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:32:41,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:41,449 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:41,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:32:43,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:32:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:32:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:43,765 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:32:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 20:32:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097852284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:45,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:45,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:45,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219438148] [2021-08-06 20:32:45,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:45,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:45,020 INFO L87 Difference]: Start difference. First operand 353 states and 770 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:45,703 INFO L93 Difference]: Finished difference Result 487 states and 1021 transitions. [2021-08-06 20:32:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:32:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:45,705 INFO L225 Difference]: With dead ends: 487 [2021-08-06 20:32:45,705 INFO L226 Difference]: Without dead ends: 482 [2021-08-06 20:32:45,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 842.5ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:32:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-06 20:32:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 356. [2021-08-06 20:32:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.1971830985915495) internal successors, (780), 355 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 780 transitions. [2021-08-06 20:32:45,713 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 780 transitions. Word has length 26 [2021-08-06 20:32:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:45,713 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 780 transitions. [2021-08-06 20:32:45,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 780 transitions. [2021-08-06 20:32:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:45,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:45,714 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:45,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:45,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:32:45,929 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1125002074, now seen corresponding path program 13 times [2021-08-06 20:32:45,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:45,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412532549] [2021-08-06 20:32:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:45,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:46,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 51.4 percent of original size [2021-08-06 20:32:46,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 51.4 percent of original size [2021-08-06 20:32:46,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.7 percent of original size [2021-08-06 20:32:46,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.7 percent of original size [2021-08-06 20:32:46,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 73.6 percent of original size [2021-08-06 20:32:46,231 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 73.6 percent of original size [2021-08-06 20:32:46,320 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 69.1 percent of original size [2021-08-06 20:32:46,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 69.1 percent of original size [2021-08-06 20:32:46,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 47.9 percent of original size [2021-08-06 20:32:46,377 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 47.9 percent of original size [2021-08-06 20:32:46,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 39.5 percent of original size [2021-08-06 20:32:46,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 39.5 percent of original size [2021-08-06 20:32:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:46,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:46,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412532549] [2021-08-06 20:32:46,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412532549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:46,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713061157] [2021-08-06 20:32:46,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:32:46,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:46,433 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:46,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:32:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:48,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:32:48,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:48,815 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:32:48,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 20:32:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:50,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713061157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:50,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:50,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:50,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69855874] [2021-08-06 20:32:50,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:50,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:50,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:50,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:50,209 INFO L87 Difference]: Start difference. First operand 356 states and 780 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:50,885 INFO L93 Difference]: Finished difference Result 476 states and 1001 transitions. [2021-08-06 20:32:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:32:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:50,887 INFO L225 Difference]: With dead ends: 476 [2021-08-06 20:32:50,887 INFO L226 Difference]: Without dead ends: 471 [2021-08-06 20:32:50,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 930.0ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:32:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-06 20:32:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 358. [2021-08-06 20:32:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.196078431372549) internal successors, (784), 357 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 784 transitions. [2021-08-06 20:32:50,893 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 784 transitions. Word has length 26 [2021-08-06 20:32:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:50,894 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 784 transitions. [2021-08-06 20:32:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 784 transitions. [2021-08-06 20:32:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:50,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:50,895 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:50,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:51,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:51,109 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1758141146, now seen corresponding path program 14 times [2021-08-06 20:32:51,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:51,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878799967] [2021-08-06 20:32:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:51,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:51,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 143, result has 40.4 percent of original size [2021-08-06 20:32:51,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 143, result has 40.4 percent of original size [2021-08-06 20:32:51,353 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 64, result has 58.4 percent of original size [2021-08-06 20:32:51,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 64, result has 58.4 percent of original size [2021-08-06 20:32:51,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 73.8 percent of original size [2021-08-06 20:32:51,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 73.8 percent of original size [2021-08-06 20:32:51,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 72.8 percent of original size [2021-08-06 20:32:51,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 72.8 percent of original size [2021-08-06 20:32:51,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 54, result has 59.4 percent of original size [2021-08-06 20:32:51,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 54, result has 59.4 percent of original size [2021-08-06 20:32:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:51,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:51,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878799967] [2021-08-06 20:32:51,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878799967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:51,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426616345] [2021-08-06 20:32:51,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:51,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:51,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:51,809 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:51,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:32:53,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:53,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:53,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:32:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:55,001 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:32:55,003 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 118 treesize of output 100 [2021-08-06 20:32:59,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 85.2 percent of original size [2021-08-06 20:32:59,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 85.2 percent of original size [2021-08-06 20:32:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:59,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426616345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:59,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:59,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:32:59,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393072977] [2021-08-06 20:32:59,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:32:59,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:32:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:59,613 INFO L87 Difference]: Start difference. First operand 358 states and 784 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:02,487 INFO L93 Difference]: Finished difference Result 567 states and 1147 transitions. [2021-08-06 20:33:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:33:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:02,489 INFO L225 Difference]: With dead ends: 567 [2021-08-06 20:33:02,489 INFO L226 Difference]: Without dead ends: 557 [2021-08-06 20:33:02,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 3021.1ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:33:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-06 20:33:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 365. [2021-08-06 20:33:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.217032967032967) internal successors, (807), 364 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 807 transitions. [2021-08-06 20:33:02,495 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 807 transitions. Word has length 26 [2021-08-06 20:33:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 807 transitions. [2021-08-06 20:33:02,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 807 transitions. [2021-08-06 20:33:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:02,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:02,497 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:02,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:02,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:02,725 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash -429256102, now seen corresponding path program 15 times [2021-08-06 20:33:02,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:02,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703543958] [2021-08-06 20:33:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:02,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:02,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 126, result has 21.7 percent of original size [2021-08-06 20:33:02,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 126, result has 21.7 percent of original size [2021-08-06 20:33:02,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 117, result has 42.9 percent of original size [2021-08-06 20:33:02,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 117, result has 42.9 percent of original size [2021-08-06 20:33:02,938 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 119, result has 43.9 percent of original size [2021-08-06 20:33:02,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 119, result has 43.9 percent of original size [2021-08-06 20:33:03,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 93, result has 54.0 percent of original size [2021-08-06 20:33:03,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 93, result has 54.0 percent of original size [2021-08-06 20:33:03,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 65.2 percent of original size [2021-08-06 20:33:03,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 65.2 percent of original size [2021-08-06 20:33:03,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 88.2 percent of original size [2021-08-06 20:33:03,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 88.2 percent of original size [2021-08-06 20:33:03,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 45.3 percent of original size [2021-08-06 20:33:03,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 45.3 percent of original size [2021-08-06 20:33:03,293 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 39.6 percent of original size [2021-08-06 20:33:03,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 39.6 percent of original size [2021-08-06 20:33:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:03,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:03,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703543958] [2021-08-06 20:33:03,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703543958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:03,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625777656] [2021-08-06 20:33:03,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:33:03,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:03,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:03,321 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:03,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:33:05,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:33:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:33:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:06,699 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-08-06 20:33:06,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 103 [2021-08-06 20:33:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:07,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625777656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:07,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:07,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 20:33:07,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989301558] [2021-08-06 20:33:07,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:33:07,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:33:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:33:07,483 INFO L87 Difference]: Start difference. First operand 365 states and 807 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:10,415 INFO L93 Difference]: Finished difference Result 454 states and 928 transitions. [2021-08-06 20:33:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:33:10,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:10,417 INFO L225 Difference]: With dead ends: 454 [2021-08-06 20:33:10,417 INFO L226 Difference]: Without dead ends: 444 [2021-08-06 20:33:10,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 3047.7ms TimeCoverageRelationStatistics Valid=414, Invalid=2342, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:33:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-06 20:33:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 365. [2021-08-06 20:33:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.217032967032967) internal successors, (807), 364 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 807 transitions. [2021-08-06 20:33:10,425 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 807 transitions. Word has length 26 [2021-08-06 20:33:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:10,425 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 807 transitions. [2021-08-06 20:33:10,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 807 transitions. [2021-08-06 20:33:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:10,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:10,426 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:10,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:10,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:10,645 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:10,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1920751014, now seen corresponding path program 16 times [2021-08-06 20:33:10,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:10,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554530598] [2021-08-06 20:33:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:10,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:10,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 73.1 percent of original size [2021-08-06 20:33:10,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 73.1 percent of original size [2021-08-06 20:33:10,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 63.9 percent of original size [2021-08-06 20:33:10,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 63.9 percent of original size [2021-08-06 20:33:10,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 65.9 percent of original size [2021-08-06 20:33:10,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 65.9 percent of original size [2021-08-06 20:33:10,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 57.4 percent of original size [2021-08-06 20:33:10,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 57.4 percent of original size [2021-08-06 20:33:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:11,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:11,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554530598] [2021-08-06 20:33:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554530598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:11,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584262217] [2021-08-06 20:33:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:33:11,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:11,132 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:11,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:33:13,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:33:13,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:13,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:13,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:14,200 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 20:33:14,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-06 20:33:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:14,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584262217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:14,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:14,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:33:14,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498003762] [2021-08-06 20:33:14,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:14,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:14,458 INFO L87 Difference]: Start difference. First operand 365 states and 807 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:16,393 INFO L93 Difference]: Finished difference Result 641 states and 1289 transitions. [2021-08-06 20:33:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:33:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:16,395 INFO L225 Difference]: With dead ends: 641 [2021-08-06 20:33:16,396 INFO L226 Difference]: Without dead ends: 626 [2021-08-06 20:33:16,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2005.0ms TimeCoverageRelationStatistics Valid=465, Invalid=2397, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:33:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-08-06 20:33:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 397. [2021-08-06 20:33:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.2373737373737375) internal successors, (886), 396 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 886 transitions. [2021-08-06 20:33:16,403 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 886 transitions. Word has length 26 [2021-08-06 20:33:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:16,403 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 886 transitions. [2021-08-06 20:33:16,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 886 transitions. [2021-08-06 20:33:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:16,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:16,404 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:16,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:16,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 20:33:16,604 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:16,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2001640870, now seen corresponding path program 17 times [2021-08-06 20:33:16,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:16,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791460498] [2021-08-06 20:33:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:16,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:16,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 70.9 percent of original size [2021-08-06 20:33:16,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 70.9 percent of original size [2021-08-06 20:33:16,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 67.3 percent of original size [2021-08-06 20:33:16,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 67.3 percent of original size [2021-08-06 20:33:16,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 68.2 percent of original size [2021-08-06 20:33:16,817 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 68.2 percent of original size [2021-08-06 20:33:16,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 63.3 percent of original size [2021-08-06 20:33:16,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 63.3 percent of original size [2021-08-06 20:33:16,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 74.1 percent of original size [2021-08-06 20:33:16,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 74.1 percent of original size [2021-08-06 20:33:17,053 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 74.5 percent of original size [2021-08-06 20:33:17,062 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 74.5 percent of original size [2021-08-06 20:33:17,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 84.8 percent of original size [2021-08-06 20:33:17,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 84.8 percent of original size [2021-08-06 20:33:17,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 20:33:17,155 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 20:33:17,183 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 20:33:17,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 77.3 percent of original size [2021-08-06 20:33:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:17,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:17,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791460498] [2021-08-06 20:33:17,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791460498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:17,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576332620] [2021-08-06 20:33:17,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:33:17,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:17,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:17,213 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:17,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:33:19,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:33:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:20,076 INFO L354 Elim1Store]: treesize reduction 20, result has 60.8 percent of original size [2021-08-06 20:33:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 106 [2021-08-06 20:33:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:21,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576332620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:21,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:21,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:33:21,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308731699] [2021-08-06 20:33:21,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:21,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:21,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:21,107 INFO L87 Difference]: Start difference. First operand 397 states and 886 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:24,247 INFO L93 Difference]: Finished difference Result 703 states and 1451 transitions. [2021-08-06 20:33:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:33:24,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:24,250 INFO L225 Difference]: With dead ends: 703 [2021-08-06 20:33:24,250 INFO L226 Difference]: Without dead ends: 687 [2021-08-06 20:33:24,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 3152.8ms TimeCoverageRelationStatistics Valid=611, Invalid=2469, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:33:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-08-06 20:33:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 407. [2021-08-06 20:33:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.2413793103448274) internal successors, (910), 406 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 910 transitions. [2021-08-06 20:33:24,259 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 910 transitions. Word has length 26 [2021-08-06 20:33:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:24,259 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 910 transitions. [2021-08-06 20:33:24,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 910 transitions. [2021-08-06 20:33:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:24,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:24,260 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:24,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 20:33:24,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:24,478 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:24,478 INFO L82 PathProgramCache]: Analyzing trace with hash 836353438, now seen corresponding path program 15 times [2021-08-06 20:33:24,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:24,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130336722] [2021-08-06 20:33:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:24,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:24,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 54.4 percent of original size [2021-08-06 20:33:24,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 54.4 percent of original size [2021-08-06 20:33:24,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 84, result has 48.5 percent of original size [2021-08-06 20:33:24,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 84, result has 48.5 percent of original size [2021-08-06 20:33:24,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 93, result has 43.6 percent of original size [2021-08-06 20:33:24,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 93, result has 43.6 percent of original size [2021-08-06 20:33:24,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 42.2 percent of original size [2021-08-06 20:33:24,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 42.2 percent of original size [2021-08-06 20:33:24,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 64.3 percent of original size [2021-08-06 20:33:24,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 64.3 percent of original size [2021-08-06 20:33:24,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:33:24,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:33:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:24,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:24,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130336722] [2021-08-06 20:33:24,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130336722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:24,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646506930] [2021-08-06 20:33:24,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:33:24,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:24,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:24,872 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:24,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:33:27,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:33:27,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:33:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:27,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:33:27,808 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 103 treesize of output 103 [2021-08-06 20:33:32,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 151, result has 73.5 percent of original size [2021-08-06 20:33:32,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 151, result has 73.5 percent of original size [2021-08-06 20:33:35,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 122, result has 53.3 percent of original size [2021-08-06 20:33:35,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 122, result has 53.3 percent of original size [2021-08-06 20:33:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:36,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646506930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:36,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:36,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 20:33:36,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124939890] [2021-08-06 20:33:36,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:33:36,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:33:36,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:33:36,062 INFO L87 Difference]: Start difference. First operand 407 states and 910 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:38,843 INFO L93 Difference]: Finished difference Result 600 states and 1248 transitions. [2021-08-06 20:33:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:33:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:38,845 INFO L225 Difference]: With dead ends: 600 [2021-08-06 20:33:38,845 INFO L226 Difference]: Without dead ends: 590 [2021-08-06 20:33:38,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2869.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:33:38,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-08-06 20:33:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 403. [2021-08-06 20:33:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.2388059701492535) internal successors, (900), 402 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 900 transitions. [2021-08-06 20:33:38,852 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 900 transitions. Word has length 26 [2021-08-06 20:33:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:38,852 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 900 transitions. [2021-08-06 20:33:38,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 900 transitions. [2021-08-06 20:33:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:38,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:38,854 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:38,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:39,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:39,072 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1935474206, now seen corresponding path program 18 times [2021-08-06 20:33:39,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:39,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086735258] [2021-08-06 20:33:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:39,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:39,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 70.9 percent of original size [2021-08-06 20:33:39,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 70.9 percent of original size [2021-08-06 20:33:39,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 79.9 percent of original size [2021-08-06 20:33:39,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 79.9 percent of original size [2021-08-06 20:33:39,338 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 80.4 percent of original size [2021-08-06 20:33:39,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 80.4 percent of original size [2021-08-06 20:33:39,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 78, result has 62.5 percent of original size [2021-08-06 20:33:39,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 78, result has 62.5 percent of original size [2021-08-06 20:33:39,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 71, result has 68.0 percent of original size [2021-08-06 20:33:39,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 71, result has 68.0 percent of original size [2021-08-06 20:33:39,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 71.2 percent of original size [2021-08-06 20:33:39,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 71.2 percent of original size [2021-08-06 20:33:39,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 55.3 percent of original size [2021-08-06 20:33:39,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 55.3 percent of original size [2021-08-06 20:33:39,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 52.5 percent of original size [2021-08-06 20:33:39,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 52.5 percent of original size [2021-08-06 20:33:39,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 49.3 percent of original size [2021-08-06 20:33:39,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 49.3 percent of original size [2021-08-06 20:33:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:39,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:39,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086735258] [2021-08-06 20:33:39,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086735258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:39,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925174033] [2021-08-06 20:33:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:33:39,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:39,961 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:39,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:33:42,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:33:42,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:42,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:43,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:43,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:33:43,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 100 [2021-08-06 20:33:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:43,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925174033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:44,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:44,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-06 20:33:44,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248117668] [2021-08-06 20:33:44,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:44,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:44,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:44,000 INFO L87 Difference]: Start difference. First operand 403 states and 900 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:49,561 INFO L93 Difference]: Finished difference Result 605 states and 1294 transitions. [2021-08-06 20:33:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 20:33:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:49,564 INFO L225 Difference]: With dead ends: 605 [2021-08-06 20:33:49,564 INFO L226 Difference]: Without dead ends: 595 [2021-08-06 20:33:49,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 5449.8ms TimeCoverageRelationStatistics Valid=943, Invalid=3749, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 20:33:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-06 20:33:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 419. [2021-08-06 20:33:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.2464114832535884) internal successors, (939), 418 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 939 transitions. [2021-08-06 20:33:49,572 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 939 transitions. Word has length 26 [2021-08-06 20:33:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:49,572 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 939 transitions. [2021-08-06 20:33:49,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 939 transitions. [2021-08-06 20:33:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:49,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:49,574 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:49,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:49,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 20:33:49,801 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1975466006, now seen corresponding path program 16 times [2021-08-06 20:33:49,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:49,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016249671] [2021-08-06 20:33:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:49,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:49,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 99, result has 48.4 percent of original size [2021-08-06 20:33:49,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 99, result has 48.4 percent of original size [2021-08-06 20:33:50,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 120, result has 40.6 percent of original size [2021-08-06 20:33:50,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 120, result has 40.6 percent of original size [2021-08-06 20:33:50,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 62.0 percent of original size [2021-08-06 20:33:50,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 62.0 percent of original size [2021-08-06 20:33:50,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 69, result has 56.9 percent of original size [2021-08-06 20:33:50,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 69, result has 56.9 percent of original size [2021-08-06 20:33:50,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 81.0 percent of original size [2021-08-06 20:33:50,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 81.0 percent of original size [2021-08-06 20:33:50,271 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 79.3 percent of original size [2021-08-06 20:33:50,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 79.3 percent of original size [2021-08-06 20:33:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:50,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:50,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016249671] [2021-08-06 20:33:50,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016249671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:50,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247056303] [2021-08-06 20:33:50,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:33:50,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:50,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:50,306 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:50,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:33:52,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:33:52,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:52,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:33:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:53,629 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:33:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:33:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:54,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247056303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:54,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:54,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:54,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295638889] [2021-08-06 20:33:54,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:54,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:54,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:54,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:54,693 INFO L87 Difference]: Start difference. First operand 419 states and 939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:56,365 INFO L93 Difference]: Finished difference Result 601 states and 1260 transitions. [2021-08-06 20:33:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:33:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:56,368 INFO L225 Difference]: With dead ends: 601 [2021-08-06 20:33:56,368 INFO L226 Difference]: Without dead ends: 596 [2021-08-06 20:33:56,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1753.0ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:33:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-06 20:33:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 417. [2021-08-06 20:33:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.2403846153846154) internal successors, (932), 416 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 932 transitions. [2021-08-06 20:33:56,374 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 932 transitions. Word has length 26 [2021-08-06 20:33:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:56,374 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 932 transitions. [2021-08-06 20:33:56,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 932 transitions. [2021-08-06 20:33:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:56,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:56,375 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:56,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:56,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 20:33:56,597 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash 291662298, now seen corresponding path program 17 times [2021-08-06 20:33:56,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:56,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778853944] [2021-08-06 20:33:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:56,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:56,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 79.0 percent of original size [2021-08-06 20:33:56,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 79.0 percent of original size [2021-08-06 20:33:56,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 86.3 percent of original size [2021-08-06 20:33:56,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 86.3 percent of original size [2021-08-06 20:33:57,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 90.9 percent of original size [2021-08-06 20:33:57,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 90.9 percent of original size [2021-08-06 20:33:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:57,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:57,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778853944] [2021-08-06 20:33:57,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778853944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:57,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96597847] [2021-08-06 20:33:57,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:33:57,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:57,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:57,105 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:57,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:33:59,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:33:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:33:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:00,871 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:34:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:34:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96597847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:01,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:01,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:34:01,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410790306] [2021-08-06 20:34:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:01,377 INFO L87 Difference]: Start difference. First operand 417 states and 932 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:02,184 INFO L93 Difference]: Finished difference Result 585 states and 1243 transitions. [2021-08-06 20:34:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:34:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:02,186 INFO L225 Difference]: With dead ends: 585 [2021-08-06 20:34:02,186 INFO L226 Difference]: Without dead ends: 580 [2021-08-06 20:34:02,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1025.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:34:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-06 20:34:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 429. [2021-08-06 20:34:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.2429906542056073) internal successors, (960), 428 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 960 transitions. [2021-08-06 20:34:02,196 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 960 transitions. Word has length 26 [2021-08-06 20:34:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:02,196 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 960 transitions. [2021-08-06 20:34:02,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 960 transitions. [2021-08-06 20:34:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:02,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:02,197 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:02,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:02,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 20:34:02,397 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1280722470, now seen corresponding path program 18 times [2021-08-06 20:34:02,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:02,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215285687] [2021-08-06 20:34:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:02,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:02,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:34:02,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 88.3 percent of original size [2021-08-06 20:34:02,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 85.3 percent of original size [2021-08-06 20:34:02,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 85.3 percent of original size [2021-08-06 20:34:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:02,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:02,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215285687] [2021-08-06 20:34:02,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215285687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:02,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002493245] [2021-08-06 20:34:02,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:34:02,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:02,759 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:02,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:34:05,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:34:05,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:34:05,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:06,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:06,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:34:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:07,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002493245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:07,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:07,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:34:07,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155248136] [2021-08-06 20:34:07,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:07,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:07,591 INFO L87 Difference]: Start difference. First operand 429 states and 960 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:08,746 INFO L93 Difference]: Finished difference Result 627 states and 1315 transitions. [2021-08-06 20:34:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:34:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:08,752 INFO L225 Difference]: With dead ends: 627 [2021-08-06 20:34:08,752 INFO L226 Difference]: Without dead ends: 622 [2021-08-06 20:34:08,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1304.0ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:34:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-06 20:34:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 431. [2021-08-06 20:34:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.2488372093023257) internal successors, (967), 430 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 967 transitions. [2021-08-06 20:34:08,760 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 967 transitions. Word has length 26 [2021-08-06 20:34:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:08,760 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 967 transitions. [2021-08-06 20:34:08,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 967 transitions. [2021-08-06 20:34:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:08,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:08,761 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:08,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 20:34:08,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 20:34:08,977 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:08,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1454412646, now seen corresponding path program 19 times [2021-08-06 20:34:08,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:08,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606674771] [2021-08-06 20:34:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:08,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:09,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 55.8 percent of original size [2021-08-06 20:34:09,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 55.8 percent of original size [2021-08-06 20:34:09,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 89.1 percent of original size [2021-08-06 20:34:09,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 89.1 percent of original size [2021-08-06 20:34:09,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 84.2 percent of original size [2021-08-06 20:34:09,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 84.2 percent of original size [2021-08-06 20:34:09,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 82.7 percent of original size [2021-08-06 20:34:09,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 82.7 percent of original size [2021-08-06 20:34:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:09,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:09,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606674771] [2021-08-06 20:34:09,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606674771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:09,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770790544] [2021-08-06 20:34:09,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:34:09,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:09,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:09,445 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:09,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:34:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:13,048 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:34:13,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 20:34:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:14,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770790544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:14,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:14,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 20:34:14,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497671848] [2021-08-06 20:34:14,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:34:14,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:34:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:34:14,317 INFO L87 Difference]: Start difference. First operand 431 states and 967 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:14,896 INFO L93 Difference]: Finished difference Result 589 states and 1260 transitions. [2021-08-06 20:34:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:34:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:14,898 INFO L225 Difference]: With dead ends: 589 [2021-08-06 20:34:14,898 INFO L226 Difference]: Without dead ends: 584 [2021-08-06 20:34:14,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 752.0ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:34:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-08-06 20:34:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 431. [2021-08-06 20:34:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.2488372093023257) internal successors, (967), 430 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 967 transitions. [2021-08-06 20:34:14,904 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 967 transitions. Word has length 26 [2021-08-06 20:34:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:14,904 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 967 transitions. [2021-08-06 20:34:14,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 967 transitions. [2021-08-06 20:34:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:14,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:14,905 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:14,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:15,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 20:34:15,106 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:15,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:15,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2046217062, now seen corresponding path program 20 times [2021-08-06 20:34:15,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:15,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369743638] [2021-08-06 20:34:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:15,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:15,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 94.6 percent of original size [2021-08-06 20:34:15,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 94.6 percent of original size [2021-08-06 20:34:15,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 77.2 percent of original size [2021-08-06 20:34:15,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 77.2 percent of original size [2021-08-06 20:34:15,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.6 percent of original size [2021-08-06 20:34:15,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.6 percent of original size [2021-08-06 20:34:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:15,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:15,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369743638] [2021-08-06 20:34:15,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369743638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:15,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199435549] [2021-08-06 20:34:15,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:34:15,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:15,492 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:15,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:34:18,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:34:18,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:18,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:34:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:19,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 20:34:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:20,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199435549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:20,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:20,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:34:20,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130755204] [2021-08-06 20:34:20,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:20,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:20,263 INFO L87 Difference]: Start difference. First operand 431 states and 967 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:21,022 INFO L93 Difference]: Finished difference Result 591 states and 1264 transitions. [2021-08-06 20:34:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:34:21,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:21,025 INFO L225 Difference]: With dead ends: 591 [2021-08-06 20:34:21,025 INFO L226 Difference]: Without dead ends: 586 [2021-08-06 20:34:21,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:34:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-06 20:34:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 435. [2021-08-06 20:34:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.2465437788018434) internal successors, (975), 434 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 975 transitions. [2021-08-06 20:34:21,031 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 975 transitions. Word has length 26 [2021-08-06 20:34:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:21,031 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 975 transitions. [2021-08-06 20:34:21,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 975 transitions. [2021-08-06 20:34:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:21,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:21,032 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:21,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 20:34:21,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 20:34:21,245 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2095905962, now seen corresponding path program 21 times [2021-08-06 20:34:21,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:21,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018597545] [2021-08-06 20:34:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:21,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:21,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 66.5 percent of original size [2021-08-06 20:34:21,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 66.5 percent of original size [2021-08-06 20:34:21,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 82.1 percent of original size [2021-08-06 20:34:21,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 82.1 percent of original size [2021-08-06 20:34:21,591 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:34:21,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 80.0 percent of original size [2021-08-06 20:34:21,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.0 percent of original size [2021-08-06 20:34:21,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.0 percent of original size [2021-08-06 20:34:21,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 88.9 percent of original size [2021-08-06 20:34:21,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 88.9 percent of original size [2021-08-06 20:34:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:21,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:21,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018597545] [2021-08-06 20:34:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018597545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:21,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201762508] [2021-08-06 20:34:21,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:34:21,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:21,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:21,733 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:21,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:34:24,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:34:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:24,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:25,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:25,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 87 [2021-08-06 20:34:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201762508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:26,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:26,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:34:26,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631740705] [2021-08-06 20:34:26,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:26,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:26,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:26,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:26,683 INFO L87 Difference]: Start difference. First operand 435 states and 975 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:27,663 INFO L93 Difference]: Finished difference Result 601 states and 1278 transitions. [2021-08-06 20:34:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:34:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:27,666 INFO L225 Difference]: With dead ends: 601 [2021-08-06 20:34:27,666 INFO L226 Difference]: Without dead ends: 591 [2021-08-06 20:34:27,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1185.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:34:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-06 20:34:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 446. [2021-08-06 20:34:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.247191011235955) internal successors, (1000), 445 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1000 transitions. [2021-08-06 20:34:27,674 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1000 transitions. Word has length 26 [2021-08-06 20:34:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:27,674 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1000 transitions. [2021-08-06 20:34:27,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1000 transitions. [2021-08-06 20:34:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:27,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:27,675 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:27,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:27,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 20:34:27,885 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1598426410, now seen corresponding path program 22 times [2021-08-06 20:34:27,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:27,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942441839] [2021-08-06 20:34:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:27,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:28,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 67, result has 64.2 percent of original size [2021-08-06 20:34:28,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 67, result has 64.2 percent of original size [2021-08-06 20:34:28,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 86.0 percent of original size [2021-08-06 20:34:28,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 86.0 percent of original size [2021-08-06 20:34:28,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 94.2 percent of original size [2021-08-06 20:34:28,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 94.2 percent of original size [2021-08-06 20:34:28,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 91.7 percent of original size [2021-08-06 20:34:28,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 91.7 percent of original size [2021-08-06 20:34:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:28,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:28,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942441839] [2021-08-06 20:34:28,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942441839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:28,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608807804] [2021-08-06 20:34:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:34:28,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:28,609 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:28,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:34:31,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:34:31,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:34:31,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:32,740 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:34:32,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:34:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:33,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608807804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:33,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:33,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:34:33,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663372525] [2021-08-06 20:34:33,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:34:33,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:34:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:34:33,294 INFO L87 Difference]: Start difference. First operand 446 states and 1000 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:34,239 INFO L93 Difference]: Finished difference Result 609 states and 1291 transitions. [2021-08-06 20:34:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:34:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:34,242 INFO L225 Difference]: With dead ends: 609 [2021-08-06 20:34:34,242 INFO L226 Difference]: Without dead ends: 599 [2021-08-06 20:34:34,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1076.1ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:34:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-08-06 20:34:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 452. [2021-08-06 20:34:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.2527716186252773) internal successors, (1016), 451 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1016 transitions. [2021-08-06 20:34:34,248 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1016 transitions. Word has length 26 [2021-08-06 20:34:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:34,248 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1016 transitions. [2021-08-06 20:34:34,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1016 transitions. [2021-08-06 20:34:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:34,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:34,250 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:34,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:34,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 20:34:34,453 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash 509143638, now seen corresponding path program 19 times [2021-08-06 20:34:34,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:34,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029868154] [2021-08-06 20:34:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:34,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:34,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 63.3 percent of original size [2021-08-06 20:34:34,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 63.3 percent of original size [2021-08-06 20:34:34,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 85.3 percent of original size [2021-08-06 20:34:34,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 85.3 percent of original size [2021-08-06 20:34:34,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 65.3 percent of original size [2021-08-06 20:34:34,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 65.3 percent of original size [2021-08-06 20:34:34,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 93.5 percent of original size [2021-08-06 20:34:34,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 93.5 percent of original size [2021-08-06 20:34:34,711 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 93.5 percent of original size [2021-08-06 20:34:34,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 93.5 percent of original size [2021-08-06 20:34:34,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 93.2 percent of original size [2021-08-06 20:34:34,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 93.2 percent of original size [2021-08-06 20:34:34,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 20:34:34,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 20:34:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:34,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:34,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029868154] [2021-08-06 20:34:34,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029868154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:34,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135848007] [2021-08-06 20:34:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:34:34,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:34,878 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:34,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:34:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:34:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:39,294 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 20:34:39,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-06 20:34:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:39,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135848007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:39,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:39,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:34:39,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131725192] [2021-08-06 20:34:39,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:34:39,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:34:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:34:39,486 INFO L87 Difference]: Start difference. First operand 452 states and 1016 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:40,380 INFO L93 Difference]: Finished difference Result 599 states and 1247 transitions. [2021-08-06 20:34:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:34:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:40,382 INFO L225 Difference]: With dead ends: 599 [2021-08-06 20:34:40,382 INFO L226 Difference]: Without dead ends: 589 [2021-08-06 20:34:40,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1056.5ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:34:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-06 20:34:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 460. [2021-08-06 20:34:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.2570806100217866) internal successors, (1036), 459 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1036 transitions. [2021-08-06 20:34:40,397 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1036 transitions. Word has length 26 [2021-08-06 20:34:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:40,398 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1036 transitions. [2021-08-06 20:34:40,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1036 transitions. [2021-08-06 20:34:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:40,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:40,398 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:40,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 20:34:40,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:40,599 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:40,600 INFO L82 PathProgramCache]: Analyzing trace with hash -405959978, now seen corresponding path program 23 times [2021-08-06 20:34:40,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:40,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179821700] [2021-08-06 20:34:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:40,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:40,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 61, result has 63.5 percent of original size [2021-08-06 20:34:40,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 61, result has 63.5 percent of original size [2021-08-06 20:34:40,843 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 77.1 percent of original size [2021-08-06 20:34:40,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 77.1 percent of original size [2021-08-06 20:34:40,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 77.7 percent of original size [2021-08-06 20:34:40,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 77.7 percent of original size [2021-08-06 20:34:41,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 72.4 percent of original size [2021-08-06 20:34:41,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 72.4 percent of original size [2021-08-06 20:34:41,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 91.4 percent of original size [2021-08-06 20:34:41,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 91.4 percent of original size [2021-08-06 20:34:41,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.6 percent of original size [2021-08-06 20:34:41,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.6 percent of original size [2021-08-06 20:34:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:41,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:41,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179821700] [2021-08-06 20:34:41,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179821700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:41,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829544481] [2021-08-06 20:34:41,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:34:41,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:41,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:41,149 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:41,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:34:44,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:34:44,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:34:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:45,433 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:34:45,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:34:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:46,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829544481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:46,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:46,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:34:46,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886990991] [2021-08-06 20:34:46,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:46,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:46,703 INFO L87 Difference]: Start difference. First operand 460 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:48,409 INFO L93 Difference]: Finished difference Result 637 states and 1343 transitions. [2021-08-06 20:34:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:34:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:48,411 INFO L225 Difference]: With dead ends: 637 [2021-08-06 20:34:48,411 INFO L226 Difference]: Without dead ends: 632 [2021-08-06 20:34:48,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1788.2ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:34:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-08-06 20:34:48,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 460. [2021-08-06 20:34:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.2570806100217866) internal successors, (1036), 459 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1036 transitions. [2021-08-06 20:34:48,417 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1036 transitions. Word has length 26 [2021-08-06 20:34:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:48,417 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1036 transitions. [2021-08-06 20:34:48,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1036 transitions. [2021-08-06 20:34:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:48,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:48,418 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:48,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:48,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:48,619 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:48,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1063241130, now seen corresponding path program 20 times [2021-08-06 20:34:48,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:48,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956577085] [2021-08-06 20:34:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:48,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:48,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:34:48,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:34:48,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 73.2 percent of original size [2021-08-06 20:34:48,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 73.2 percent of original size [2021-08-06 20:34:48,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 54.0 percent of original size [2021-08-06 20:34:48,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 54.0 percent of original size [2021-08-06 20:34:48,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 74.7 percent of original size [2021-08-06 20:34:48,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 74.7 percent of original size [2021-08-06 20:34:48,891 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 75.3 percent of original size [2021-08-06 20:34:48,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 75.3 percent of original size [2021-08-06 20:34:48,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 20:34:48,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 89.1 percent of original size [2021-08-06 20:34:48,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 87.8 percent of original size [2021-08-06 20:34:48,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 87.8 percent of original size [2021-08-06 20:34:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:49,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:49,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956577085] [2021-08-06 20:34:49,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956577085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:49,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543615884] [2021-08-06 20:34:49,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:34:49,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:49,029 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:49,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:34:52,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:34:52,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:52,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:52,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:53,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:53,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:53,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:53,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 100 [2021-08-06 20:34:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:54,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543615884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:54,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:54,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:34:54,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816780413] [2021-08-06 20:34:54,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:34:54,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:34:54,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:34:54,372 INFO L87 Difference]: Start difference. First operand 460 states and 1036 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:57,609 INFO L93 Difference]: Finished difference Result 825 states and 1689 transitions. [2021-08-06 20:34:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:34:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:57,614 INFO L225 Difference]: With dead ends: 825 [2021-08-06 20:34:57,614 INFO L226 Difference]: Without dead ends: 809 [2021-08-06 20:34:57,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 3135.2ms TimeCoverageRelationStatistics Valid=457, Invalid=1705, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:34:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-08-06 20:34:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 481. [2021-08-06 20:34:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.2416666666666667) internal successors, (1076), 480 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1076 transitions. [2021-08-06 20:34:57,622 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1076 transitions. Word has length 26 [2021-08-06 20:34:57,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:57,622 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1076 transitions. [2021-08-06 20:34:57,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1076 transitions. [2021-08-06 20:34:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:57,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:57,623 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:57,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:57,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 20:34:57,824 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:57,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:57,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1774753178, now seen corresponding path program 24 times [2021-08-06 20:34:57,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:57,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62629972] [2021-08-06 20:34:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:57,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:57,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 72.5 percent of original size [2021-08-06 20:34:57,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 72.5 percent of original size [2021-08-06 20:34:58,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 89.6 percent of original size [2021-08-06 20:34:58,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 89.6 percent of original size [2021-08-06 20:34:58,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 82.1 percent of original size [2021-08-06 20:34:58,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 82.1 percent of original size [2021-08-06 20:34:58,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 92.9 percent of original size [2021-08-06 20:34:58,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 92.9 percent of original size [2021-08-06 20:34:58,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 87.8 percent of original size [2021-08-06 20:34:58,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 87.8 percent of original size [2021-08-06 20:34:58,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 86.1 percent of original size [2021-08-06 20:34:58,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 86.1 percent of original size [2021-08-06 20:34:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:58,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:58,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62629972] [2021-08-06 20:34:58,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62629972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:58,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468645709] [2021-08-06 20:34:58,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:34:58,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:58,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:58,397 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:58,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:35:01,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:35:01,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:35:01,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:02,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:02,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 20:35:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:03,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468645709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:03,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:03,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:35:03,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779528346] [2021-08-06 20:35:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:35:03,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:35:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:35:03,873 INFO L87 Difference]: Start difference. First operand 481 states and 1076 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:05,493 INFO L93 Difference]: Finished difference Result 672 states and 1424 transitions. [2021-08-06 20:35:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:35:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:05,496 INFO L225 Difference]: With dead ends: 672 [2021-08-06 20:35:05,496 INFO L226 Difference]: Without dead ends: 667 [2021-08-06 20:35:05,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1691.8ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:35:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-08-06 20:35:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 481. [2021-08-06 20:35:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.2416666666666667) internal successors, (1076), 480 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1076 transitions. [2021-08-06 20:35:05,504 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1076 transitions. Word has length 26 [2021-08-06 20:35:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:05,505 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1076 transitions. [2021-08-06 20:35:05,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1076 transitions. [2021-08-06 20:35:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:05,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:05,505 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:05,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 20:35:05,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 20:35:05,730 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:05,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:05,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1421093350, now seen corresponding path program 21 times [2021-08-06 20:35:05,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:05,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655634963] [2021-08-06 20:35:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:05,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:05,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 67.3 percent of original size [2021-08-06 20:35:05,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 67.3 percent of original size [2021-08-06 20:35:05,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 94.9 percent of original size [2021-08-06 20:35:05,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 94.9 percent of original size [2021-08-06 20:35:05,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 71.8 percent of original size [2021-08-06 20:35:05,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 71.8 percent of original size [2021-08-06 20:35:05,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 85.1 percent of original size [2021-08-06 20:35:05,965 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 85.1 percent of original size [2021-08-06 20:35:06,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 88.4 percent of original size [2021-08-06 20:35:06,025 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 88.4 percent of original size [2021-08-06 20:35:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:06,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:06,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655634963] [2021-08-06 20:35:06,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655634963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:06,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663627756] [2021-08-06 20:35:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:06,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:06,138 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:06,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:35:09,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:35:09,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:35:09,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:10,826 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 20:35:10,827 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 120 treesize of output 118 [2021-08-06 20:35:13,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 82.5 percent of original size [2021-08-06 20:35:13,683 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 82.5 percent of original size [2021-08-06 20:35:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:14,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663627756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:14,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:14,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 20:35:14,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704229918] [2021-08-06 20:35:14,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:35:14,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:14,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:35:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:35:14,057 INFO L87 Difference]: Start difference. First operand 481 states and 1076 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:16,346 INFO L93 Difference]: Finished difference Result 726 states and 1542 transitions. [2021-08-06 20:35:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:35:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:16,348 INFO L225 Difference]: With dead ends: 726 [2021-08-06 20:35:16,348 INFO L226 Difference]: Without dead ends: 716 [2021-08-06 20:35:16,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2414.2ms TimeCoverageRelationStatistics Valid=469, Invalid=1787, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:35:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-06 20:35:16,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 500. [2021-08-06 20:35:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.244488977955912) internal successors, (1120), 499 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1120 transitions. [2021-08-06 20:35:16,355 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1120 transitions. Word has length 26 [2021-08-06 20:35:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:16,355 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1120 transitions. [2021-08-06 20:35:16,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1120 transitions. [2021-08-06 20:35:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:16,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:16,356 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:16,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 20:35:16,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 20:35:16,557 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:16,558 INFO L82 PathProgramCache]: Analyzing trace with hash -314370918, now seen corresponding path program 25 times [2021-08-06 20:35:16,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:16,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247376649] [2021-08-06 20:35:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:16,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:16,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 67, result has 61.7 percent of original size [2021-08-06 20:35:16,683 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 67, result has 61.7 percent of original size [2021-08-06 20:35:16,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 67, result has 61.7 percent of original size [2021-08-06 20:35:16,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 67, result has 61.7 percent of original size [2021-08-06 20:35:16,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 72.1 percent of original size [2021-08-06 20:35:16,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 72.1 percent of original size [2021-08-06 20:35:16,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 20:35:16,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 20:35:16,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 64.8 percent of original size [2021-08-06 20:35:16,970 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 64.8 percent of original size [2021-08-06 20:35:16,998 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 61.2 percent of original size [2021-08-06 20:35:17,001 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 61.2 percent of original size [2021-08-06 20:35:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:17,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:17,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247376649] [2021-08-06 20:35:17,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247376649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:17,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824720355] [2021-08-06 20:35:17,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:35:17,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:17,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:17,027 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:17,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:35:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:20,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:35:20,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:21,574 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:35:21,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 20:35:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:22,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824720355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:22,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:22,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:35:22,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407771053] [2021-08-06 20:35:22,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:22,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:22,943 INFO L87 Difference]: Start difference. First operand 500 states and 1120 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:23,737 INFO L93 Difference]: Finished difference Result 679 states and 1450 transitions. [2021-08-06 20:35:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:35:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:23,738 INFO L225 Difference]: With dead ends: 679 [2021-08-06 20:35:23,738 INFO L226 Difference]: Without dead ends: 674 [2021-08-06 20:35:23,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:35:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-08-06 20:35:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 502. [2021-08-06 20:35:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.24750499001996) internal successors, (1126), 501 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1126 transitions. [2021-08-06 20:35:23,745 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1126 transitions. Word has length 26 [2021-08-06 20:35:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:23,746 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1126 transitions. [2021-08-06 20:35:23,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1126 transitions. [2021-08-06 20:35:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:23,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:23,746 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:23,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:23,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:23,953 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash -621267686, now seen corresponding path program 22 times [2021-08-06 20:35:23,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:23,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953402712] [2021-08-06 20:35:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:23,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:24,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 69.2 percent of original size [2021-08-06 20:35:24,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 69.2 percent of original size [2021-08-06 20:35:24,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 69.6 percent of original size [2021-08-06 20:35:24,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 69.6 percent of original size [2021-08-06 20:35:24,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 70.6 percent of original size [2021-08-06 20:35:24,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 70.6 percent of original size [2021-08-06 20:35:24,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 88.0 percent of original size [2021-08-06 20:35:24,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 88.0 percent of original size [2021-08-06 20:35:24,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 54, result has 62.5 percent of original size [2021-08-06 20:35:24,435 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 54, result has 62.5 percent of original size [2021-08-06 20:35:24,543 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:35:24,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:35:24,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 53.1 percent of original size [2021-08-06 20:35:24,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 53.1 percent of original size [2021-08-06 20:35:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:24,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:24,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953402712] [2021-08-06 20:35:24,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953402712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:24,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231347614] [2021-08-06 20:35:24,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:24,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:24,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:24,619 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:24,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:35:28,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:28,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:35:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:29,505 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:35:29,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 100 [2021-08-06 20:35:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:30,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231347614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:30,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:30,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:35:30,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021265075] [2021-08-06 20:35:30,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:30,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:30,944 INFO L87 Difference]: Start difference. First operand 502 states and 1126 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:32,092 INFO L93 Difference]: Finished difference Result 714 states and 1519 transitions. [2021-08-06 20:35:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:35:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:32,093 INFO L225 Difference]: With dead ends: 714 [2021-08-06 20:35:32,093 INFO L226 Difference]: Without dead ends: 704 [2021-08-06 20:35:32,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1288.1ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:35:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-08-06 20:35:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 503. [2021-08-06 20:35:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.239043824701195) internal successors, (1124), 502 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1124 transitions. [2021-08-06 20:35:32,100 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1124 transitions. Word has length 26 [2021-08-06 20:35:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:32,100 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1124 transitions. [2021-08-06 20:35:32,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1124 transitions. [2021-08-06 20:35:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:32,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:32,101 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:32,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:32,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 20:35:32,302 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1136752764, now seen corresponding path program 26 times [2021-08-06 20:35:32,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:32,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647588971] [2021-08-06 20:35:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:32,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:32,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:32,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647588971] [2021-08-06 20:35:32,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647588971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:32,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562459823] [2021-08-06 20:35:32,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:32,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:32,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:32,384 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:32,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:35:36,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:36,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:36,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:36,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:36,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562459823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:36,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:36,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 20:35:36,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253086410] [2021-08-06 20:35:36,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:35:36,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:35:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:36,715 INFO L87 Difference]: Start difference. First operand 503 states and 1124 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-08-06 20:35:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:37,389 INFO L93 Difference]: Finished difference Result 1073 states and 2163 transitions. [2021-08-06 20:35:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:35:37,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-08-06 20:35:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:37,392 INFO L225 Difference]: With dead ends: 1073 [2021-08-06 20:35:37,392 INFO L226 Difference]: Without dead ends: 1073 [2021-08-06 20:35:37,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:35:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-06 20:35:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 563. [2021-08-06 20:35:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.2704626334519573) internal successors, (1276), 562 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1276 transitions. [2021-08-06 20:35:37,405 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1276 transitions. Word has length 28 [2021-08-06 20:35:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:37,405 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1276 transitions. [2021-08-06 20:35:37,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-08-06 20:35:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1276 transitions. [2021-08-06 20:35:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:37,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:37,407 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:37,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:37,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:37,630 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash -354742148, now seen corresponding path program 27 times [2021-08-06 20:35:37,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:37,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765170021] [2021-08-06 20:35:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:37,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:37,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:37,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765170021] [2021-08-06 20:35:37,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765170021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:37,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417725780] [2021-08-06 20:35:37,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:37,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:37,715 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:37,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:35:41,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:35:41,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:41,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:42,062 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:42,062 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:42,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417725780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:42,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:42,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:35:42,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407601811] [2021-08-06 20:35:42,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:35:42,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:35:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:35:42,085 INFO L87 Difference]: Start difference. First operand 563 states and 1276 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:42,936 INFO L93 Difference]: Finished difference Result 1223 states and 2404 transitions. [2021-08-06 20:35:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:35:42,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:42,938 INFO L225 Difference]: With dead ends: 1223 [2021-08-06 20:35:42,938 INFO L226 Difference]: Without dead ends: 1223 [2021-08-06 20:35:42,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:35:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-08-06 20:35:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 565. [2021-08-06 20:35:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 2.2588652482269502) internal successors, (1274), 564 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1274 transitions. [2021-08-06 20:35:42,948 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1274 transitions. Word has length 28 [2021-08-06 20:35:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:42,948 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 1274 transitions. [2021-08-06 20:35:42,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1274 transitions. [2021-08-06 20:35:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:42,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:42,949 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:42,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:43,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 20:35:43,153 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:43,153 INFO L82 PathProgramCache]: Analyzing trace with hash -712994820, now seen corresponding path program 23 times [2021-08-06 20:35:43,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:43,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698400465] [2021-08-06 20:35:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:43,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:43,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:43,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698400465] [2021-08-06 20:35:43,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698400465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:43,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149097351] [2021-08-06 20:35:43,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:43,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:43,247 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:43,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:35:47,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:35:47,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:47,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:47,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:47,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:47,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149097351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:47,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:47,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:35:47,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545400006] [2021-08-06 20:35:47,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:35:47,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:35:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:35:47,516 INFO L87 Difference]: Start difference. First operand 565 states and 1274 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:47,924 INFO L93 Difference]: Finished difference Result 954 states and 1948 transitions. [2021-08-06 20:35:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:35:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:47,926 INFO L225 Difference]: With dead ends: 954 [2021-08-06 20:35:47,926 INFO L226 Difference]: Without dead ends: 954 [2021-08-06 20:35:47,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:35:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-06 20:35:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 563. [2021-08-06 20:35:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.2562277580071175) internal successors, (1268), 562 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1268 transitions. [2021-08-06 20:35:47,935 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1268 transitions. Word has length 28 [2021-08-06 20:35:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:47,936 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1268 transitions. [2021-08-06 20:35:47,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1268 transitions. [2021-08-06 20:35:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:47,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:47,937 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, 1] [2021-08-06 20:35:47,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 20:35:48,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 20:35:48,138 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1576605688, now seen corresponding path program 28 times [2021-08-06 20:35:48,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:48,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406108610] [2021-08-06 20:35:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:48,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:35:48,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:48,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406108610] [2021-08-06 20:35:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406108610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:48,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482614] [2021-08-06 20:35:48,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:48,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:48,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:48,200 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:48,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:35:52,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:35:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:52,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:52,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:35:52,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:52,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:52,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:35:52,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243932580] [2021-08-06 20:35:52,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:35:52,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:52,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:35:52,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:35:52,564 INFO L87 Difference]: Start difference. First operand 563 states and 1268 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:52,669 INFO L93 Difference]: Finished difference Result 888 states and 1884 transitions. [2021-08-06 20:35:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:35:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:52,671 INFO L225 Difference]: With dead ends: 888 [2021-08-06 20:35:52,671 INFO L226 Difference]: Without dead ends: 888 [2021-08-06 20:35:52,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-08-06 20:35:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 745. [2021-08-06 20:35:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.25) internal successors, (1674), 744 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1674 transitions. [2021-08-06 20:35:52,684 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1674 transitions. Word has length 28 [2021-08-06 20:35:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:52,684 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1674 transitions. [2021-08-06 20:35:52,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1674 transitions. [2021-08-06 20:35:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:52,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:52,685 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, 1] [2021-08-06 20:35:52,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:52,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:52,889 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:52,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash -273141896, now seen corresponding path program 29 times [2021-08-06 20:35:52,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:52,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692059490] [2021-08-06 20:35:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:52,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:52,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:52,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692059490] [2021-08-06 20:35:52,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692059490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:52,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229998134] [2021-08-06 20:35:52,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:52,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:52,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:52,985 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:53,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:35:57,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:35:57,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:35:57,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:57,326 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:57,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:57,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229998134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:57,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:57,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:35:57,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47799963] [2021-08-06 20:35:57,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:35:57,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:57,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:35:57,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:35:57,357 INFO L87 Difference]: Start difference. First operand 745 states and 1674 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:57,688 INFO L93 Difference]: Finished difference Result 1076 states and 2195 transitions. [2021-08-06 20:35:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:35:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:57,690 INFO L225 Difference]: With dead ends: 1076 [2021-08-06 20:35:57,690 INFO L226 Difference]: Without dead ends: 1058 [2021-08-06 20:35:57,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:35:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-08-06 20:35:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 814. [2021-08-06 20:35:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.252152521525215) internal successors, (1831), 813 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1831 transitions. [2021-08-06 20:35:57,706 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1831 transitions. Word has length 28 [2021-08-06 20:35:57,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:57,706 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1831 transitions. [2021-08-06 20:35:57,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:57,706 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1831 transitions. [2021-08-06 20:35:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:57,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:57,707 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:57,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:35:57,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 20:35:57,926 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash 235890424, now seen corresponding path program 24 times [2021-08-06 20:35:57,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:57,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674903938] [2021-08-06 20:35:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:57,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:58,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:58,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674903938] [2021-08-06 20:35:58,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674903938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:58,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528827677] [2021-08-06 20:35:58,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:58,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:58,010 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:58,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:36:02,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:36:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:02,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:02,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528827677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:02,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:02,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:36:02,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359699968] [2021-08-06 20:36:02,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:36:02,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:36:02,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:36:02,393 INFO L87 Difference]: Start difference. First operand 814 states and 1831 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:02,706 INFO L93 Difference]: Finished difference Result 1568 states and 3160 transitions. [2021-08-06 20:36:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:36:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:02,708 INFO L225 Difference]: With dead ends: 1568 [2021-08-06 20:36:02,709 INFO L226 Difference]: Without dead ends: 1542 [2021-08-06 20:36:02,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:36:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-08-06 20:36:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1040. [2021-08-06 20:36:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.271414821944177) internal successors, (2360), 1039 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2360 transitions. [2021-08-06 20:36:02,726 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2360 transitions. Word has length 28 [2021-08-06 20:36:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:02,726 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 2360 transitions. [2021-08-06 20:36:02,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2360 transitions. [2021-08-06 20:36:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:02,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:02,728 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, 1] [2021-08-06 20:36:02,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:02,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 20:36:02,929 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:02,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1289611128, now seen corresponding path program 30 times [2021-08-06 20:36:02,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:02,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615302443] [2021-08-06 20:36:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:02,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:03,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:03,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615302443] [2021-08-06 20:36:03,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615302443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:03,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361435685] [2021-08-06 20:36:03,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:03,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:03,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:03,025 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:03,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:36:07,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:36:07,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:07,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:07,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:07,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361435685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:07,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:07,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:36:07,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082584222] [2021-08-06 20:36:07,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:07,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:07,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:07,409 INFO L87 Difference]: Start difference. First operand 1040 states and 2360 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:07,799 INFO L93 Difference]: Finished difference Result 1468 states and 2957 transitions. [2021-08-06 20:36:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:36:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:07,802 INFO L225 Difference]: With dead ends: 1468 [2021-08-06 20:36:07,802 INFO L226 Difference]: Without dead ends: 1456 [2021-08-06 20:36:07,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:36:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-08-06 20:36:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1052. [2021-08-06 20:36:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.2778306374881065) internal successors, (2394), 1051 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2394 transitions. [2021-08-06 20:36:07,818 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2394 transitions. Word has length 28 [2021-08-06 20:36:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:07,819 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 2394 transitions. [2021-08-06 20:36:07,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2394 transitions. [2021-08-06 20:36:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:07,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:07,821 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, 1] [2021-08-06 20:36:07,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:08,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:08,037 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1475240072, now seen corresponding path program 31 times [2021-08-06 20:36:08,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:08,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593753448] [2021-08-06 20:36:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:08,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:08,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:08,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593753448] [2021-08-06 20:36:08,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593753448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:08,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136827307] [2021-08-06 20:36:08,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:08,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:08,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:08,113 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:08,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:36:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:12,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:12,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:12,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136827307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:12,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:12,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:36:12,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681283127] [2021-08-06 20:36:12,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:12,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:12,522 INFO L87 Difference]: Start difference. First operand 1052 states and 2394 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:12,947 INFO L93 Difference]: Finished difference Result 1432 states and 2917 transitions. [2021-08-06 20:36:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:36:12,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:12,949 INFO L225 Difference]: With dead ends: 1432 [2021-08-06 20:36:12,949 INFO L226 Difference]: Without dead ends: 1418 [2021-08-06 20:36:12,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:36:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-08-06 20:36:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1038. [2021-08-06 20:36:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.2883317261330762) internal successors, (2373), 1037 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2373 transitions. [2021-08-06 20:36:12,964 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2373 transitions. Word has length 28 [2021-08-06 20:36:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:12,964 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 2373 transitions. [2021-08-06 20:36:12,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2373 transitions. [2021-08-06 20:36:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:12,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:12,966 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:12,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 20:36:13,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:13,166 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash -750794888, now seen corresponding path program 32 times [2021-08-06 20:36:13,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:13,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488345733] [2021-08-06 20:36:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:13,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:13,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:13,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488345733] [2021-08-06 20:36:13,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488345733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:13,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713195375] [2021-08-06 20:36:13,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:13,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:13,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:13,239 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:13,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:36:17,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:17,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:17,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:17,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:17,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:17,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:17,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713195375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:17,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:17,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:17,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129103162] [2021-08-06 20:36:17,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:17,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:17,544 INFO L87 Difference]: Start difference. First operand 1038 states and 2373 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:17,840 INFO L93 Difference]: Finished difference Result 1529 states and 3098 transitions. [2021-08-06 20:36:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:36:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:17,843 INFO L225 Difference]: With dead ends: 1529 [2021-08-06 20:36:17,844 INFO L226 Difference]: Without dead ends: 1505 [2021-08-06 20:36:17,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:36:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-08-06 20:36:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1046. [2021-08-06 20:36:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.295693779904306) internal successors, (2399), 1045 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 2399 transitions. [2021-08-06 20:36:17,866 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 2399 transitions. Word has length 28 [2021-08-06 20:36:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:17,867 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 2399 transitions. [2021-08-06 20:36:17,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 2399 transitions. [2021-08-06 20:36:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:17,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:17,869 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, 1] [2021-08-06 20:36:17,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:18,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:18,097 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:18,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1269458952, now seen corresponding path program 33 times [2021-08-06 20:36:18,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:18,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018597042] [2021-08-06 20:36:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:18,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:18,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:18,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018597042] [2021-08-06 20:36:18,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018597042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:18,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527839790] [2021-08-06 20:36:18,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:18,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:18,158 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:18,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:36:22,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:36:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:36:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:22,495 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:22,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:22,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527839790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:22,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:22,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:36:22,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028905635] [2021-08-06 20:36:22,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:36:22,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:22,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:36:22,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:36:22,532 INFO L87 Difference]: Start difference. First operand 1046 states and 2399 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:22,629 INFO L93 Difference]: Finished difference Result 1187 states and 2590 transitions. [2021-08-06 20:36:22,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:36:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:22,631 INFO L225 Difference]: With dead ends: 1187 [2021-08-06 20:36:22,631 INFO L226 Difference]: Without dead ends: 1187 [2021-08-06 20:36:22,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-08-06 20:36:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 973. [2021-08-06 20:36:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 2.295267489711934) internal successors, (2231), 972 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2231 transitions. [2021-08-06 20:36:22,645 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2231 transitions. Word has length 28 [2021-08-06 20:36:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:22,645 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 2231 transitions. [2021-08-06 20:36:22,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2231 transitions. [2021-08-06 20:36:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:22,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:22,647 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:22,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:22,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 20:36:22,861 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:22,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:22,861 INFO L82 PathProgramCache]: Analyzing trace with hash -241891208, now seen corresponding path program 34 times [2021-08-06 20:36:22,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:22,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659824956] [2021-08-06 20:36:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:22,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:22,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:22,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659824956] [2021-08-06 20:36:22,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659824956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:22,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014186886] [2021-08-06 20:36:22,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:22,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:22,944 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:22,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:36:27,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:27,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:27,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:27,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:27,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014186886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:27,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:27,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:36:27,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97811831] [2021-08-06 20:36:27,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:27,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:27,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:27,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:27,345 INFO L87 Difference]: Start difference. First operand 973 states and 2231 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:28,081 INFO L93 Difference]: Finished difference Result 2938 states and 5918 transitions. [2021-08-06 20:36:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:36:28,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:28,087 INFO L225 Difference]: With dead ends: 2938 [2021-08-06 20:36:28,087 INFO L226 Difference]: Without dead ends: 2938 [2021-08-06 20:36:28,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:36:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-08-06 20:36:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 914. [2021-08-06 20:36:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.2694414019715223) internal successors, (2072), 913 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2072 transitions. [2021-08-06 20:36:28,135 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2072 transitions. Word has length 28 [2021-08-06 20:36:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:28,135 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2072 transitions. [2021-08-06 20:36:28,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2072 transitions. [2021-08-06 20:36:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:28,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:28,137 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, 1] [2021-08-06 20:36:28,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:28,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 20:36:28,347 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash 15931256, now seen corresponding path program 35 times [2021-08-06 20:36:28,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:28,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335892736] [2021-08-06 20:36:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:28,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:28,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:28,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335892736] [2021-08-06 20:36:28,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335892736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:28,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929168992] [2021-08-06 20:36:28,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:28,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:28,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:28,445 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:36:32,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:36:32,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:32,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:32,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:32,747 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:32,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929168992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:32,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:32,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:32,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178519484] [2021-08-06 20:36:32,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:32,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:32,777 INFO L87 Difference]: Start difference. First operand 914 states and 2072 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:33,135 INFO L93 Difference]: Finished difference Result 1447 states and 2950 transitions. [2021-08-06 20:36:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:36:33,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:33,137 INFO L225 Difference]: With dead ends: 1447 [2021-08-06 20:36:33,137 INFO L226 Difference]: Without dead ends: 1443 [2021-08-06 20:36:33,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:36:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-08-06 20:36:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 982. [2021-08-06 20:36:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.2996941896024463) internal successors, (2256), 981 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2256 transitions. [2021-08-06 20:36:33,155 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2256 transitions. Word has length 28 [2021-08-06 20:36:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:33,155 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 2256 transitions. [2021-08-06 20:36:33,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2256 transitions. [2021-08-06 20:36:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:33,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:33,157 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:33,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 20:36:33,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 20:36:33,375 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:33,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1556453512, now seen corresponding path program 36 times [2021-08-06 20:36:33,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:33,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585276324] [2021-08-06 20:36:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:33,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:33,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:33,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585276324] [2021-08-06 20:36:33,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585276324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:33,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621461017] [2021-08-06 20:36:33,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:33,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:33,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:33,448 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:33,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:36:37,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:36:37,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:37,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:37,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:37,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:37,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621461017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:37,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:37,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:37,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029964459] [2021-08-06 20:36:37,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:37,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:37,832 INFO L87 Difference]: Start difference. First operand 982 states and 2256 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:38,288 INFO L93 Difference]: Finished difference Result 1476 states and 3018 transitions. [2021-08-06 20:36:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:36:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:38,290 INFO L225 Difference]: With dead ends: 1476 [2021-08-06 20:36:38,290 INFO L226 Difference]: Without dead ends: 1476 [2021-08-06 20:36:38,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:36:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-08-06 20:36:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 917. [2021-08-06 20:36:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.2816593886462884) internal successors, (2090), 916 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2090 transitions. [2021-08-06 20:36:38,305 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2090 transitions. Word has length 28 [2021-08-06 20:36:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:38,306 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 2090 transitions. [2021-08-06 20:36:38,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2090 transitions. [2021-08-06 20:36:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:38,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:38,307 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, 1] [2021-08-06 20:36:38,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 20:36:38,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:38,508 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1279463288, now seen corresponding path program 37 times [2021-08-06 20:36:38,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:38,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363302430] [2021-08-06 20:36:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:38,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:38,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:38,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363302430] [2021-08-06 20:36:38,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363302430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:38,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685427597] [2021-08-06 20:36:38,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:38,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:38,581 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:38,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:36:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:42,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:42,944 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:42,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685427597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:42,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:42,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:36:42,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875657293] [2021-08-06 20:36:42,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:36:42,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:36:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:36:42,981 INFO L87 Difference]: Start difference. First operand 917 states and 2090 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:43,476 INFO L93 Difference]: Finished difference Result 1494 states and 3106 transitions. [2021-08-06 20:36:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:36:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:43,478 INFO L225 Difference]: With dead ends: 1494 [2021-08-06 20:36:43,479 INFO L226 Difference]: Without dead ends: 1492 [2021-08-06 20:36:43,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:36:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-06 20:36:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1064. [2021-08-06 20:36:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 2.2897460018814675) internal successors, (2434), 1063 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 2434 transitions. [2021-08-06 20:36:43,499 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 2434 transitions. Word has length 28 [2021-08-06 20:36:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:43,500 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 2434 transitions. [2021-08-06 20:36:43,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 2434 transitions. [2021-08-06 20:36:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:43,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:43,502 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, 1] [2021-08-06 20:36:43,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:43,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:43,729 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1823037576, now seen corresponding path program 38 times [2021-08-06 20:36:43,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:43,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719383769] [2021-08-06 20:36:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:43,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:43,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:43,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719383769] [2021-08-06 20:36:43,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719383769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:43,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316355908] [2021-08-06 20:36:43,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:43,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:43,815 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:43,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:36:48,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:48,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:48,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:48,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:48,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:48,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316355908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:48,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:48,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:36:48,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246763794] [2021-08-06 20:36:48,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:36:48,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:36:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:36:48,284 INFO L87 Difference]: Start difference. First operand 1064 states and 2434 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:48,938 INFO L93 Difference]: Finished difference Result 1547 states and 3209 transitions. [2021-08-06 20:36:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:36:48,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:48,940 INFO L225 Difference]: With dead ends: 1547 [2021-08-06 20:36:48,940 INFO L226 Difference]: Without dead ends: 1547 [2021-08-06 20:36:48,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:36:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-08-06 20:36:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1064. [2021-08-06 20:36:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 2.2869238005644403) internal successors, (2431), 1063 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 2431 transitions. [2021-08-06 20:36:48,957 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 2431 transitions. Word has length 28 [2021-08-06 20:36:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:48,958 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 2431 transitions. [2021-08-06 20:36:48,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 2431 transitions. [2021-08-06 20:36:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:48,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:48,959 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, 1] [2021-08-06 20:36:48,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:49,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 20:36:49,160 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:49,160 INFO L82 PathProgramCache]: Analyzing trace with hash 205561912, now seen corresponding path program 39 times [2021-08-06 20:36:49,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:49,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184359662] [2021-08-06 20:36:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:49,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:49,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:49,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184359662] [2021-08-06 20:36:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184359662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:49,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204312014] [2021-08-06 20:36:49,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:49,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:49,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:49,227 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:49,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:36:53,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:36:53,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:53,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:53,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:53,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:53,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:53,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204312014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:53,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:53,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:36:53,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997291574] [2021-08-06 20:36:53,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:36:53,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:36:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:36:53,767 INFO L87 Difference]: Start difference. First operand 1064 states and 2431 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:54,011 INFO L93 Difference]: Finished difference Result 1603 states and 3488 transitions. [2021-08-06 20:36:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:36:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:54,013 INFO L225 Difference]: With dead ends: 1603 [2021-08-06 20:36:54,013 INFO L226 Difference]: Without dead ends: 1591 [2021-08-06 20:36:54,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:36:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-08-06 20:36:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1198. [2021-08-06 20:36:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.3049289891395155) internal successors, (2759), 1197 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2759 transitions. [2021-08-06 20:36:54,029 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2759 transitions. Word has length 28 [2021-08-06 20:36:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:54,029 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 2759 transitions. [2021-08-06 20:36:54,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2759 transitions. [2021-08-06 20:36:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:54,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:54,030 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, 1] [2021-08-06 20:36:54,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 20:36:54,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 20:36:54,231 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1005529464, now seen corresponding path program 40 times [2021-08-06 20:36:54,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:54,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857947817] [2021-08-06 20:36:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:54,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:54,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:54,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857947817] [2021-08-06 20:36:54,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857947817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:54,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080844653] [2021-08-06 20:36:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:54,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:54,306 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:54,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:36:58,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:36:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:58,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:58,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:58,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080844653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:58,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:58,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:36:58,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350182934] [2021-08-06 20:36:58,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:36:58,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:36:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:36:58,723 INFO L87 Difference]: Start difference. First operand 1198 states and 2759 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:58,818 INFO L93 Difference]: Finished difference Result 1259 states and 2863 transitions. [2021-08-06 20:36:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:36:58,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:58,819 INFO L225 Difference]: With dead ends: 1259 [2021-08-06 20:36:58,819 INFO L226 Difference]: Without dead ends: 1259 [2021-08-06 20:36:58,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:36:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-08-06 20:36:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1226. [2021-08-06 20:36:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.2987755102040817) internal successors, (2816), 1225 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2816 transitions. [2021-08-06 20:36:58,831 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2816 transitions. Word has length 28 [2021-08-06 20:36:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:58,831 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2816 transitions. [2021-08-06 20:36:58,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2816 transitions. [2021-08-06 20:36:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:58,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:58,832 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, 1] [2021-08-06 20:36:58,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 20:36:59,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:59,033 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:59,033 INFO L82 PathProgramCache]: Analyzing trace with hash -717941764, now seen corresponding path program 41 times [2021-08-06 20:36:59,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:59,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938954621] [2021-08-06 20:36:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:59,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:59,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:59,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938954621] [2021-08-06 20:36:59,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938954621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:59,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918251734] [2021-08-06 20:36:59,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:59,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:59,096 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:59,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:37:03,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:37:03,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:03,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:03,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:03,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:03,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:03,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918251734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:03,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:03,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:37:03,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556387499] [2021-08-06 20:37:03,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:37:03,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:37:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:37:03,447 INFO L87 Difference]: Start difference. First operand 1226 states and 2816 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:03,650 INFO L93 Difference]: Finished difference Result 1463 states and 3214 transitions. [2021-08-06 20:37:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:37:03,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:03,652 INFO L225 Difference]: With dead ends: 1463 [2021-08-06 20:37:03,652 INFO L226 Difference]: Without dead ends: 1455 [2021-08-06 20:37:03,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:37:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-06 20:37:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1328. [2021-08-06 20:37:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.3044461190655614) internal successors, (3058), 1327 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3058 transitions. [2021-08-06 20:37:03,667 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3058 transitions. Word has length 28 [2021-08-06 20:37:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:03,667 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 3058 transitions. [2021-08-06 20:37:03,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3058 transitions. [2021-08-06 20:37:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:03,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:03,669 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, 1] [2021-08-06 20:37:03,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:03,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 20:37:03,882 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2004640764, now seen corresponding path program 42 times [2021-08-06 20:37:03,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:03,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220079286] [2021-08-06 20:37:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:03,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:03,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220079286] [2021-08-06 20:37:03,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220079286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:03,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462216102] [2021-08-06 20:37:03,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:03,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:03,947 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:03,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:37:08,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:37:08,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:08,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:08,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:08,462 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:08,462 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:08,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462216102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:08,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:08,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:37:08,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144329158] [2021-08-06 20:37:08,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:37:08,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:37:08,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:37:08,499 INFO L87 Difference]: Start difference. First operand 1328 states and 3058 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:08,763 INFO L93 Difference]: Finished difference Result 1427 states and 3180 transitions. [2021-08-06 20:37:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:37:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:08,766 INFO L225 Difference]: With dead ends: 1427 [2021-08-06 20:37:08,766 INFO L226 Difference]: Without dead ends: 1427 [2021-08-06 20:37:08,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:37:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-08-06 20:37:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1300. [2021-08-06 20:37:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.3040800615858354) internal successors, (2993), 1299 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 2993 transitions. [2021-08-06 20:37:08,780 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 2993 transitions. Word has length 28 [2021-08-06 20:37:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:08,780 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 2993 transitions. [2021-08-06 20:37:08,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 2993 transitions. [2021-08-06 20:37:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:08,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:08,781 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, 1] [2021-08-06 20:37:08,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:08,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 20:37:08,982 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1597099644, now seen corresponding path program 43 times [2021-08-06 20:37:08,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:08,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403406490] [2021-08-06 20:37:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:08,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:09,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:09,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403406490] [2021-08-06 20:37:09,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403406490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:09,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927543449] [2021-08-06 20:37:09,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:09,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:09,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:09,046 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:09,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:37:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:13,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:13,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:13,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927543449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:13,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:13,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:37:13,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453844723] [2021-08-06 20:37:13,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:37:13,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:37:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:37:13,431 INFO L87 Difference]: Start difference. First operand 1300 states and 2993 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:13,725 INFO L93 Difference]: Finished difference Result 1453 states and 3270 transitions. [2021-08-06 20:37:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:37:13,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:13,727 INFO L225 Difference]: With dead ends: 1453 [2021-08-06 20:37:13,727 INFO L226 Difference]: Without dead ends: 1453 [2021-08-06 20:37:13,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:37:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-08-06 20:37:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1330. [2021-08-06 20:37:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 2.292701279157261) internal successors, (3047), 1329 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 3047 transitions. [2021-08-06 20:37:13,740 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 3047 transitions. Word has length 28 [2021-08-06 20:37:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:13,740 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 3047 transitions. [2021-08-06 20:37:13,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 3047 transitions. [2021-08-06 20:37:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:13,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:13,742 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:13,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:13,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 20:37:13,942 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash -527973576, now seen corresponding path program 44 times [2021-08-06 20:37:13,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:13,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670935674] [2021-08-06 20:37:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:13,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:14,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:14,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670935674] [2021-08-06 20:37:14,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670935674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:14,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216512206] [2021-08-06 20:37:14,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:14,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:14,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:14,011 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:14,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:37:18,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:18,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:18,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:18,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:18,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:18,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216512206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:18,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:18,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:37:18,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32162750] [2021-08-06 20:37:18,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:37:18,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:37:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:37:18,524 INFO L87 Difference]: Start difference. First operand 1330 states and 3047 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:19,229 INFO L93 Difference]: Finished difference Result 2982 states and 6146 transitions. [2021-08-06 20:37:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:37:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:19,233 INFO L225 Difference]: With dead ends: 2982 [2021-08-06 20:37:19,233 INFO L226 Difference]: Without dead ends: 2982 [2021-08-06 20:37:19,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:37:19,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-08-06 20:37:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1380. [2021-08-06 20:37:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.295141406816534) internal successors, (3165), 1379 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3165 transitions. [2021-08-06 20:37:19,255 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3165 transitions. Word has length 28 [2021-08-06 20:37:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:19,255 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 3165 transitions. [2021-08-06 20:37:19,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3165 transitions. [2021-08-06 20:37:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:19,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:19,257 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:19,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:19,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 20:37:19,458 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:19,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1579596472, now seen corresponding path program 25 times [2021-08-06 20:37:19,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:19,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374134223] [2021-08-06 20:37:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:19,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:19,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:19,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374134223] [2021-08-06 20:37:19,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374134223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:19,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817968523] [2021-08-06 20:37:19,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:19,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:19,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:19,549 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:19,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:37:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:23,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:23,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:23,991 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:24,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817968523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:24,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:24,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 20:37:24,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312206876] [2021-08-06 20:37:24,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:37:24,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:37:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:37:24,014 INFO L87 Difference]: Start difference. First operand 1380 states and 3165 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-08-06 20:37:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:24,551 INFO L93 Difference]: Finished difference Result 2733 states and 5637 transitions. [2021-08-06 20:37:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:37:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-08-06 20:37:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:24,555 INFO L225 Difference]: With dead ends: 2733 [2021-08-06 20:37:24,555 INFO L226 Difference]: Without dead ends: 2733 [2021-08-06 20:37:24,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:37:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-08-06 20:37:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1378. [2021-08-06 20:37:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 2.2941176470588234) internal successors, (3159), 1377 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 3159 transitions. [2021-08-06 20:37:24,576 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 3159 transitions. Word has length 28 [2021-08-06 20:37:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:24,576 INFO L470 AbstractCegarLoop]: Abstraction has 1378 states and 3159 transitions. [2021-08-06 20:37:24,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-08-06 20:37:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 3159 transitions. [2021-08-06 20:37:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:24,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:24,578 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, 1] [2021-08-06 20:37:24,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:24,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:24,778 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2088628792, now seen corresponding path program 45 times [2021-08-06 20:37:24,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:24,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512290535] [2021-08-06 20:37:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:24,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:24,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:24,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512290535] [2021-08-06 20:37:24,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512290535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:24,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159260148] [2021-08-06 20:37:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:24,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:24,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:24,839 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:24,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:37:29,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:37:29,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:29,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:29,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:29,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:29,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159260148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:29,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:29,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:37:29,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309917375] [2021-08-06 20:37:29,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:29,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:29,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:29,373 INFO L87 Difference]: Start difference. First operand 1378 states and 3159 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:29,702 INFO L93 Difference]: Finished difference Result 1900 states and 4088 transitions. [2021-08-06 20:37:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:37:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:29,705 INFO L225 Difference]: With dead ends: 1900 [2021-08-06 20:37:29,705 INFO L226 Difference]: Without dead ends: 1894 [2021-08-06 20:37:29,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:37:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-08-06 20:37:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1577. [2021-08-06 20:37:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 2.311548223350254) internal successors, (3643), 1576 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 3643 transitions. [2021-08-06 20:37:29,728 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 3643 transitions. Word has length 28 [2021-08-06 20:37:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:29,728 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 3643 transitions. [2021-08-06 20:37:29,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 3643 transitions. [2021-08-06 20:37:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:29,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:29,730 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, 1] [2021-08-06 20:37:29,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 20:37:29,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:29,933 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -676222408, now seen corresponding path program 46 times [2021-08-06 20:37:29,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:29,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060697171] [2021-08-06 20:37:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:29,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:30,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:30,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060697171] [2021-08-06 20:37:30,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060697171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:30,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400358521] [2021-08-06 20:37:30,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:30,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:30,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:30,022 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:30,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:37:34,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:34,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:34,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:34,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400358521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:34,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:34,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:37:34,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614662594] [2021-08-06 20:37:34,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:34,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:34,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:34,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:34,497 INFO L87 Difference]: Start difference. First operand 1577 states and 3643 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:34,847 INFO L93 Difference]: Finished difference Result 1892 states and 4073 transitions. [2021-08-06 20:37:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:37:34,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:34,849 INFO L225 Difference]: With dead ends: 1892 [2021-08-06 20:37:34,850 INFO L226 Difference]: Without dead ends: 1886 [2021-08-06 20:37:34,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:37:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-08-06 20:37:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1551. [2021-08-06 20:37:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.3103225806451615) internal successors, (3581), 1550 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3581 transitions. [2021-08-06 20:37:34,869 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3581 transitions. Word has length 28 [2021-08-06 20:37:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:34,870 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 3581 transitions. [2021-08-06 20:37:34,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3581 transitions. [2021-08-06 20:37:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:34,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:34,872 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, 1] [2021-08-06 20:37:34,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 20:37:35,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:35,072 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1292601912, now seen corresponding path program 47 times [2021-08-06 20:37:35,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:35,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961129559] [2021-08-06 20:37:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:35,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:35,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:35,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961129559] [2021-08-06 20:37:35,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961129559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:35,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004795850] [2021-08-06 20:37:35,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:35,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:35,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:35,131 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:35,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:37:39,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:37:39,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:39,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:39,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:39,568 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:39,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004795850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:39,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:39,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:37:39,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048616428] [2021-08-06 20:37:39,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:39,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:39,599 INFO L87 Difference]: Start difference. First operand 1551 states and 3581 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:39,955 INFO L93 Difference]: Finished difference Result 1936 states and 4168 transitions. [2021-08-06 20:37:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:37:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:39,958 INFO L225 Difference]: With dead ends: 1936 [2021-08-06 20:37:39,958 INFO L226 Difference]: Without dead ends: 1932 [2021-08-06 20:37:39,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:37:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-08-06 20:37:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1551. [2021-08-06 20:37:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.309032258064516) internal successors, (3579), 1550 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3579 transitions. [2021-08-06 20:37:40,008 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3579 transitions. Word has length 28 [2021-08-06 20:37:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:40,008 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 3579 transitions. [2021-08-06 20:37:40,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3579 transitions. [2021-08-06 20:37:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:40,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:40,010 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, 1] [2021-08-06 20:37:40,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 20:37:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 20:37:40,210 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash -279782856, now seen corresponding path program 48 times [2021-08-06 20:37:40,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:40,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021627377] [2021-08-06 20:37:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:40,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:40,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:40,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021627377] [2021-08-06 20:37:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021627377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:40,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539470719] [2021-08-06 20:37:40,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:40,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:40,290 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:40,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:37:44,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:37:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:44,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:44,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:44,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:44,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539470719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:44,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:44,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:37:44,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496962361] [2021-08-06 20:37:44,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:44,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:44,759 INFO L87 Difference]: Start difference. First operand 1551 states and 3579 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:45,292 INFO L93 Difference]: Finished difference Result 1969 states and 4272 transitions. [2021-08-06 20:37:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:37:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:45,295 INFO L225 Difference]: With dead ends: 1969 [2021-08-06 20:37:45,295 INFO L226 Difference]: Without dead ends: 1969 [2021-08-06 20:37:45,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:37:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-08-06 20:37:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1536. [2021-08-06 20:37:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.3140065146579802) internal successors, (3552), 1535 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3552 transitions. [2021-08-06 20:37:45,314 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3552 transitions. Word has length 28 [2021-08-06 20:37:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:45,314 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 3552 transitions. [2021-08-06 20:37:45,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3552 transitions. [2021-08-06 20:37:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:45,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:45,316 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, 1] [2021-08-06 20:37:45,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:45,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:45,516 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1013904380, now seen corresponding path program 49 times [2021-08-06 20:37:45,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:45,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160339901] [2021-08-06 20:37:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:45,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:45,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:45,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160339901] [2021-08-06 20:37:45,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160339901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:45,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142359687] [2021-08-06 20:37:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:45,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:45,580 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:45,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:37:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:50,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:50,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:50,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142359687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:50,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:50,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:50,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767627133] [2021-08-06 20:37:50,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:50,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:50,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:50,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:50,067 INFO L87 Difference]: Start difference. First operand 1536 states and 3552 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:50,416 INFO L93 Difference]: Finished difference Result 1987 states and 4321 transitions. [2021-08-06 20:37:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:37:50,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:50,419 INFO L225 Difference]: With dead ends: 1987 [2021-08-06 20:37:50,419 INFO L226 Difference]: Without dead ends: 1983 [2021-08-06 20:37:50,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:37:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-08-06 20:37:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1543. [2021-08-06 20:37:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 2.32295719844358) internal successors, (3582), 1542 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3582 transitions. [2021-08-06 20:37:50,437 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3582 transitions. Word has length 28 [2021-08-06 20:37:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:50,437 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 3582 transitions. [2021-08-06 20:37:50,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3582 transitions. [2021-08-06 20:37:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:50,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:50,439 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, 1] [2021-08-06 20:37:50,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:50,640 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -558480388, now seen corresponding path program 50 times [2021-08-06 20:37:50,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:50,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691121122] [2021-08-06 20:37:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:50,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:50,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:50,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691121122] [2021-08-06 20:37:50,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691121122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:50,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709464986] [2021-08-06 20:37:50,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:50,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:50,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:50,749 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:50,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:37:55,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:55,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:55,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:55,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:55,211 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:55,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709464986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:55,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:55,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:55,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945553032] [2021-08-06 20:37:55,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:55,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:55,248 INFO L87 Difference]: Start difference. First operand 1543 states and 3582 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:55,746 INFO L93 Difference]: Finished difference Result 1769 states and 3909 transitions. [2021-08-06 20:37:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:37:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:55,749 INFO L225 Difference]: With dead ends: 1769 [2021-08-06 20:37:55,749 INFO L226 Difference]: Without dead ends: 1769 [2021-08-06 20:37:55,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:37:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-08-06 20:37:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1531. [2021-08-06 20:37:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.3222222222222224) internal successors, (3553), 1530 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 3553 transitions. [2021-08-06 20:37:55,765 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 3553 transitions. Word has length 28 [2021-08-06 20:37:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:55,765 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 3553 transitions. [2021-08-06 20:37:55,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 3553 transitions. [2021-08-06 20:37:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:55,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:55,767 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, 1] [2021-08-06 20:37:55,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 20:37:55,967 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash -916332608, now seen corresponding path program 51 times [2021-08-06 20:37:55,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:55,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043119410] [2021-08-06 20:37:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:55,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:56,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:56,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043119410] [2021-08-06 20:37:56,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043119410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:56,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176572605] [2021-08-06 20:37:56,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:56,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:56,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:56,061 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:56,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:38:00,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:38:00,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:00,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:00,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:00,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176572605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:00,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:00,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:38:00,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132951815] [2021-08-06 20:38:00,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:38:00,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:38:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:38:00,604 INFO L87 Difference]: Start difference. First operand 1531 states and 3553 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:01,116 INFO L93 Difference]: Finished difference Result 1958 states and 4345 transitions. [2021-08-06 20:38:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:38:01,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:01,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:01,119 INFO L225 Difference]: With dead ends: 1958 [2021-08-06 20:38:01,119 INFO L226 Difference]: Without dead ends: 1958 [2021-08-06 20:38:01,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:38:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-08-06 20:38:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1568. [2021-08-06 20:38:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 2.3197192086790044) internal successors, (3635), 1567 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 3635 transitions. [2021-08-06 20:38:01,137 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 3635 transitions. Word has length 28 [2021-08-06 20:38:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:01,137 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 3635 transitions. [2021-08-06 20:38:01,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 3635 transitions. [2021-08-06 20:38:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:01,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:01,139 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:01,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:01,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 20:38:01,345 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash 449185148, now seen corresponding path program 26 times [2021-08-06 20:38:01,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:01,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945537375] [2021-08-06 20:38:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:01,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:01,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:01,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945537375] [2021-08-06 20:38:01,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945537375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:01,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239929176] [2021-08-06 20:38:01,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:01,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:01,418 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:01,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:38:05,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:05,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:05,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:06,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:06,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239929176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:06,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:38:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128296189] [2021-08-06 20:38:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:38:06,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:38:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:06,135 INFO L87 Difference]: Start difference. First operand 1568 states and 3635 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:07,189 INFO L93 Difference]: Finished difference Result 6175 states and 12537 transitions. [2021-08-06 20:38:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:38:07,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:07,198 INFO L225 Difference]: With dead ends: 6175 [2021-08-06 20:38:07,199 INFO L226 Difference]: Without dead ends: 6175 [2021-08-06 20:38:07,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:38:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6175 states. [2021-08-06 20:38:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6175 to 2203. [2021-08-06 20:38:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.362851952770209) internal successors, (5203), 2202 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 5203 transitions. [2021-08-06 20:38:07,247 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 5203 transitions. Word has length 28 [2021-08-06 20:38:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:07,247 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 5203 transitions. [2021-08-06 20:38:07,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 5203 transitions. [2021-08-06 20:38:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:07,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:07,249 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, 1] [2021-08-06 20:38:07,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:07,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:07,450 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:07,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1972617152, now seen corresponding path program 52 times [2021-08-06 20:38:07,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:07,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797194694] [2021-08-06 20:38:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:07,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:07,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:07,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797194694] [2021-08-06 20:38:07,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797194694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:07,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017335479] [2021-08-06 20:38:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:07,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:07,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:07,533 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:07,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:38:11,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:11,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:12,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:12,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:12,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017335479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:12,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:12,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:38:12,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373363235] [2021-08-06 20:38:12,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:38:12,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:38:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:38:12,192 INFO L87 Difference]: Start difference. First operand 2203 states and 5203 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:12,801 INFO L93 Difference]: Finished difference Result 2688 states and 6122 transitions. [2021-08-06 20:38:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:38:12,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:12,805 INFO L225 Difference]: With dead ends: 2688 [2021-08-06 20:38:12,805 INFO L226 Difference]: Without dead ends: 2688 [2021-08-06 20:38:12,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:38:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-08-06 20:38:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2276. [2021-08-06 20:38:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.349010989010989) internal successors, (5344), 2275 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5344 transitions. [2021-08-06 20:38:12,831 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5344 transitions. Word has length 28 [2021-08-06 20:38:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:12,831 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5344 transitions. [2021-08-06 20:38:12,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5344 transitions. [2021-08-06 20:38:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:12,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:12,834 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:12,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:13,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:13,035 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1586685124, now seen corresponding path program 53 times [2021-08-06 20:38:13,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:13,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338966030] [2021-08-06 20:38:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:13,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:13,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:13,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338966030] [2021-08-06 20:38:13,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338966030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:13,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458473884] [2021-08-06 20:38:13,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:13,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:13,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:13,121 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:13,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:38:17,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:38:17,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:17,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:17,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:17,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:17,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458473884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:17,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:17,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 20:38:17,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658063616] [2021-08-06 20:38:17,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:38:17,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:38:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:38:17,809 INFO L87 Difference]: Start difference. First operand 2276 states and 5344 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:18,219 INFO L93 Difference]: Finished difference Result 4541 states and 9591 transitions. [2021-08-06 20:38:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:38:18,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:18,225 INFO L225 Difference]: With dead ends: 4541 [2021-08-06 20:38:18,225 INFO L226 Difference]: Without dead ends: 4541 [2021-08-06 20:38:18,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:38:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4541 states. [2021-08-06 20:38:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4541 to 2472. [2021-08-06 20:38:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.360178065560502) internal successors, (5832), 2471 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 5832 transitions. [2021-08-06 20:38:18,263 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 5832 transitions. Word has length 28 [2021-08-06 20:38:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:18,263 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 5832 transitions. [2021-08-06 20:38:18,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 5832 transitions. [2021-08-06 20:38:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:18,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:18,266 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:18,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 20:38:18,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-06 20:38:18,467 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:18,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1216787260, now seen corresponding path program 54 times [2021-08-06 20:38:18,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:18,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074606458] [2021-08-06 20:38:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:18,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:18,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:18,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074606458] [2021-08-06 20:38:18,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074606458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:18,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430276724] [2021-08-06 20:38:18,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:18,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:18,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:18,560 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:18,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:38:22,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:38:22,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:22,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:23,185 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:23,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:23,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430276724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:23,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:23,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:38:23,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916072485] [2021-08-06 20:38:23,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:38:23,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:38:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:23,208 INFO L87 Difference]: Start difference. First operand 2472 states and 5832 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:23,945 INFO L93 Difference]: Finished difference Result 4904 states and 10250 transitions. [2021-08-06 20:38:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:38:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:23,951 INFO L225 Difference]: With dead ends: 4904 [2021-08-06 20:38:23,951 INFO L226 Difference]: Without dead ends: 4904 [2021-08-06 20:38:23,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:38:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2021-08-06 20:38:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 2405. [2021-08-06 20:38:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 2.3398502495840265) internal successors, (5625), 2404 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 5625 transitions. [2021-08-06 20:38:23,994 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 5625 transitions. Word has length 28 [2021-08-06 20:38:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:23,994 INFO L470 AbstractCegarLoop]: Abstraction has 2405 states and 5625 transitions. [2021-08-06 20:38:23,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 5625 transitions. [2021-08-06 20:38:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:23,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:23,998 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, 1] [2021-08-06 20:38:24,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 20:38:24,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:24,199 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:24,199 INFO L82 PathProgramCache]: Analyzing trace with hash -893490760, now seen corresponding path program 55 times [2021-08-06 20:38:24,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:24,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624421337] [2021-08-06 20:38:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:24,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:24,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:24,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624421337] [2021-08-06 20:38:24,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624421337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:24,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19818922] [2021-08-06 20:38:24,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:24,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:24,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:24,270 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:24,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:38:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:28,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:28,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:38:28,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19818922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:28,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:28,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:38:28,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731366376] [2021-08-06 20:38:28,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:28,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:28,890 INFO L87 Difference]: Start difference. First operand 2405 states and 5625 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:28,971 INFO L93 Difference]: Finished difference Result 3019 states and 6866 transitions. [2021-08-06 20:38:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:38:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:28,975 INFO L225 Difference]: With dead ends: 3019 [2021-08-06 20:38:28,975 INFO L226 Difference]: Without dead ends: 3017 [2021-08-06 20:38:28,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:38:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-08-06 20:38:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2483. [2021-08-06 20:38:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.343674456083803) internal successors, (5817), 2482 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 5817 transitions. [2021-08-06 20:38:29,008 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 5817 transitions. Word has length 28 [2021-08-06 20:38:29,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:29,008 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 5817 transitions. [2021-08-06 20:38:29,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 5817 transitions. [2021-08-06 20:38:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:29,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:29,011 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, 1] [2021-08-06 20:38:29,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:29,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:29,213 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1551728952, now seen corresponding path program 56 times [2021-08-06 20:38:29,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:29,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107533695] [2021-08-06 20:38:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:29,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:29,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:29,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107533695] [2021-08-06 20:38:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107533695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:29,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979629999] [2021-08-06 20:38:29,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:29,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:29,293 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:38:33,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:33,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:33,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:33,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979629999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:33,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:33,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:38:33,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562683626] [2021-08-06 20:38:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:38:33,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:38:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:38:33,889 INFO L87 Difference]: Start difference. First operand 2483 states and 5817 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:34,033 INFO L93 Difference]: Finished difference Result 4128 states and 9279 transitions. [2021-08-06 20:38:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:38:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:34,038 INFO L225 Difference]: With dead ends: 4128 [2021-08-06 20:38:34,039 INFO L226 Difference]: Without dead ends: 4116 [2021-08-06 20:38:34,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:38:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2021-08-06 20:38:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 3624. [2021-08-06 20:38:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 2.32680099365167) internal successors, (8430), 3623 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 8430 transitions. [2021-08-06 20:38:34,080 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 8430 transitions. Word has length 28 [2021-08-06 20:38:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:34,081 INFO L470 AbstractCegarLoop]: Abstraction has 3624 states and 8430 transitions. [2021-08-06 20:38:34,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 8430 transitions. [2021-08-06 20:38:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:34,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:34,086 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, 1] [2021-08-06 20:38:34,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:34,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 20:38:34,286 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:34,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1689517640, now seen corresponding path program 57 times [2021-08-06 20:38:34,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:34,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894112338] [2021-08-06 20:38:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:34,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:34,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:34,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894112338] [2021-08-06 20:38:34,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894112338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:34,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888911057] [2021-08-06 20:38:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:38:34,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:34,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:34,358 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:34,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:38:38,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:38:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:39,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:39,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:38:39,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888911057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:39,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:39,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:38:39,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565042743] [2021-08-06 20:38:39,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:39,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:39,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:39,065 INFO L87 Difference]: Start difference. First operand 3624 states and 8430 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:39,175 INFO L93 Difference]: Finished difference Result 4146 states and 9431 transitions. [2021-08-06 20:38:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:38:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:39,180 INFO L225 Difference]: With dead ends: 4146 [2021-08-06 20:38:39,180 INFO L226 Difference]: Without dead ends: 4146 [2021-08-06 20:38:39,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-08-06 20:38:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3471. [2021-08-06 20:38:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 2.309798270893372) internal successors, (8015), 3470 states have internal predecessors, (8015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 8015 transitions. [2021-08-06 20:38:39,239 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 8015 transitions. Word has length 28 [2021-08-06 20:38:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:39,239 INFO L470 AbstractCegarLoop]: Abstraction has 3471 states and 8015 transitions. [2021-08-06 20:38:39,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 8015 transitions. [2021-08-06 20:38:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:39,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:39,245 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, 1] [2021-08-06 20:38:39,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:39,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:39,461 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 746070328, now seen corresponding path program 58 times [2021-08-06 20:38:39,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:39,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832232823] [2021-08-06 20:38:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:39,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:39,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:39,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832232823] [2021-08-06 20:38:39,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832232823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:39,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766128562] [2021-08-06 20:38:39,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:39,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:39,534 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:39,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:38:44,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:44,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:44,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:44,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:44,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:44,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:44,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766128562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:44,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:44,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:44,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262470265] [2021-08-06 20:38:44,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:44,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:44,200 INFO L87 Difference]: Start difference. First operand 3471 states and 8015 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:44,345 INFO L93 Difference]: Finished difference Result 3654 states and 8208 transitions. [2021-08-06 20:38:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:38:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:44,350 INFO L225 Difference]: With dead ends: 3654 [2021-08-06 20:38:44,350 INFO L226 Difference]: Without dead ends: 3654 [2021-08-06 20:38:44,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:38:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2021-08-06 20:38:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3273. [2021-08-06 20:38:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.29859413202934) internal successors, (7521), 3272 states have internal predecessors, (7521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 7521 transitions. [2021-08-06 20:38:44,385 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 7521 transitions. Word has length 28 [2021-08-06 20:38:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:44,385 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 7521 transitions. [2021-08-06 20:38:44,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 7521 transitions. [2021-08-06 20:38:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:44,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:44,389 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, 1] [2021-08-06 20:38:44,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:44,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:44,589 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1943270792, now seen corresponding path program 59 times [2021-08-06 20:38:44,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:44,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045675048] [2021-08-06 20:38:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:44,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:44,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:44,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045675048] [2021-08-06 20:38:44,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045675048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:44,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686723313] [2021-08-06 20:38:44,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:44,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:44,662 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:44,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:38:49,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:38:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:49,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:49,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:38:49,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686723313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:49,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:49,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:38:49,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978135926] [2021-08-06 20:38:49,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:38:49,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:38:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:38:49,326 INFO L87 Difference]: Start difference. First operand 3273 states and 7521 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:49,418 INFO L93 Difference]: Finished difference Result 3393 states and 7765 transitions. [2021-08-06 20:38:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:38:49,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:49,422 INFO L225 Difference]: With dead ends: 3393 [2021-08-06 20:38:49,422 INFO L226 Difference]: Without dead ends: 3393 [2021-08-06 20:38:49,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-08-06 20:38:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 3233. [2021-08-06 20:38:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 3232 states have (on average 2.2991955445544554) internal successors, (7431), 3232 states have internal predecessors, (7431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 7431 transitions. [2021-08-06 20:38:49,472 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 7431 transitions. Word has length 28 [2021-08-06 20:38:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:49,472 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 7431 transitions. [2021-08-06 20:38:49,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 7431 transitions. [2021-08-06 20:38:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:49,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:49,476 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, 1] [2021-08-06 20:38:49,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:49,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 20:38:49,693 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:49,693 INFO L82 PathProgramCache]: Analyzing trace with hash -668128392, now seen corresponding path program 60 times [2021-08-06 20:38:49,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:49,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863099376] [2021-08-06 20:38:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:49,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:49,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:49,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863099376] [2021-08-06 20:38:49,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863099376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:49,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689173259] [2021-08-06 20:38:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:49,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:49,755 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:49,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:38:54,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:38:54,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:54,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:54,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:54,391 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689173259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:54,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:54,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 20:38:54,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558652876] [2021-08-06 20:38:54,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:38:54,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:38:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:38:54,435 INFO L87 Difference]: Start difference. First operand 3233 states and 7431 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:54,554 INFO L93 Difference]: Finished difference Result 3514 states and 8012 transitions. [2021-08-06 20:38:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:38:54,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:54,558 INFO L225 Difference]: With dead ends: 3514 [2021-08-06 20:38:54,558 INFO L226 Difference]: Without dead ends: 3514 [2021-08-06 20:38:54,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:38:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-08-06 20:38:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3299. [2021-08-06 20:38:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 3298 states have (on average 2.295027289266222) internal successors, (7569), 3298 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 7569 transitions. [2021-08-06 20:38:54,593 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 7569 transitions. Word has length 28 [2021-08-06 20:38:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:54,593 INFO L470 AbstractCegarLoop]: Abstraction has 3299 states and 7569 transitions. [2021-08-06 20:38:54,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 7569 transitions. [2021-08-06 20:38:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:54,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:54,597 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:54,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:54,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:54,797 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash 859737336, now seen corresponding path program 61 times [2021-08-06 20:38:54,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:54,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184293065] [2021-08-06 20:38:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:54,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:54,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:54,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184293065] [2021-08-06 20:38:54,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184293065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:54,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238105608] [2021-08-06 20:38:54,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:54,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:54,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:54,889 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:54,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:38:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:59,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:59,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:59,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:59,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:59,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238105608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:59,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:59,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:38:59,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332036265] [2021-08-06 20:38:59,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:38:59,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:59,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:38:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:59,674 INFO L87 Difference]: Start difference. First operand 3299 states and 7569 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:00,277 INFO L93 Difference]: Finished difference Result 8762 states and 18221 transitions. [2021-08-06 20:39:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:39:00,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:00,291 INFO L225 Difference]: With dead ends: 8762 [2021-08-06 20:39:00,291 INFO L226 Difference]: Without dead ends: 8762 [2021-08-06 20:39:00,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:39:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8762 states. [2021-08-06 20:39:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8762 to 4495. [2021-08-06 20:39:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4495 states, 4494 states have (on average 2.314419225634179) internal successors, (10401), 4494 states have internal predecessors, (10401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4495 states to 4495 states and 10401 transitions. [2021-08-06 20:39:00,392 INFO L78 Accepts]: Start accepts. Automaton has 4495 states and 10401 transitions. Word has length 28 [2021-08-06 20:39:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:00,392 INFO L470 AbstractCegarLoop]: Abstraction has 4495 states and 10401 transitions. [2021-08-06 20:39:00,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4495 states and 10401 transitions. [2021-08-06 20:39:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:00,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:00,397 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, 1] [2021-08-06 20:39:00,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:00,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:00,598 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1117559800, now seen corresponding path program 62 times [2021-08-06 20:39:00,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:00,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799993620] [2021-08-06 20:39:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:00,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:00,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:00,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799993620] [2021-08-06 20:39:00,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799993620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:00,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122128807] [2021-08-06 20:39:00,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:39:00,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:00,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:00,677 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:00,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:39:05,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:39:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:05,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:39:05,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:39:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:05,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122128807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:05,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:05,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:39:05,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641374570] [2021-08-06 20:39:05,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:39:05,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:39:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:39:05,395 INFO L87 Difference]: Start difference. First operand 4495 states and 10401 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:05,553 INFO L93 Difference]: Finished difference Result 5609 states and 12730 transitions. [2021-08-06 20:39:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:39:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:05,560 INFO L225 Difference]: With dead ends: 5609 [2021-08-06 20:39:05,560 INFO L226 Difference]: Without dead ends: 5605 [2021-08-06 20:39:05,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:39:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-08-06 20:39:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5460. [2021-08-06 20:39:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 2.2985894852537094) internal successors, (12548), 5459 states have internal predecessors, (12548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 12548 transitions. [2021-08-06 20:39:05,623 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 12548 transitions. Word has length 28 [2021-08-06 20:39:05,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:05,623 INFO L470 AbstractCegarLoop]: Abstraction has 5460 states and 12548 transitions. [2021-08-06 20:39:05,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:05,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 12548 transitions. [2021-08-06 20:39:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:05,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:05,628 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, 1] [2021-08-06 20:39:05,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 20:39:05,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:05,829 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash -454824968, now seen corresponding path program 63 times [2021-08-06 20:39:05,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:05,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178335636] [2021-08-06 20:39:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:05,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:05,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:05,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178335636] [2021-08-06 20:39:05,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178335636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:05,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023429365] [2021-08-06 20:39:05,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:39:05,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:05,948 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:05,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:39:10,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:39:10,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:10,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:10,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:10,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:10,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:10,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023429365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:10,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:10,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:39:10,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158815648] [2021-08-06 20:39:10,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:39:10,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:39:10,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:39:10,725 INFO L87 Difference]: Start difference. First operand 5460 states and 12548 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:10,932 INFO L93 Difference]: Finished difference Result 5616 states and 12756 transitions. [2021-08-06 20:39:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:39:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:10,940 INFO L225 Difference]: With dead ends: 5616 [2021-08-06 20:39:10,941 INFO L226 Difference]: Without dead ends: 5616 [2021-08-06 20:39:10,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:39:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-08-06 20:39:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 5420. [2021-08-06 20:39:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5420 states, 5419 states have (on average 2.2963646429230486) internal successors, (12444), 5419 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5420 states to 5420 states and 12444 transitions. [2021-08-06 20:39:11,010 INFO L78 Accepts]: Start accepts. Automaton has 5420 states and 12444 transitions. Word has length 28 [2021-08-06 20:39:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:11,010 INFO L470 AbstractCegarLoop]: Abstraction has 5420 states and 12444 transitions. [2021-08-06 20:39:11,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5420 states and 12444 transitions. [2021-08-06 20:39:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:11,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:11,016 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, 1] [2021-08-06 20:39:11,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 20:39:11,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-06 20:39:11,217 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash -812677188, now seen corresponding path program 64 times [2021-08-06 20:39:11,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:11,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126278791] [2021-08-06 20:39:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:11,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:39:11,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:11,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126278791] [2021-08-06 20:39:11,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126278791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:11,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046752934] [2021-08-06 20:39:11,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:39:11,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:11,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:11,353 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:11,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:39:15,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:39:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:16,032 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:16,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:39:16,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046752934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:16,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:16,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:39:16,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177281887] [2021-08-06 20:39:16,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:39:16,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:39:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:39:16,068 INFO L87 Difference]: Start difference. First operand 5420 states and 12444 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:16,277 INFO L93 Difference]: Finished difference Result 5616 states and 12831 transitions. [2021-08-06 20:39:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:39:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:16,285 INFO L225 Difference]: With dead ends: 5616 [2021-08-06 20:39:16,285 INFO L226 Difference]: Without dead ends: 5616 [2021-08-06 20:39:16,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:39:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-08-06 20:39:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 5519. [2021-08-06 20:39:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 2.293947082276187) internal successors, (12658), 5518 states have internal predecessors, (12658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 12658 transitions. [2021-08-06 20:39:16,390 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 12658 transitions. Word has length 28 [2021-08-06 20:39:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:16,391 INFO L470 AbstractCegarLoop]: Abstraction has 5519 states and 12658 transitions. [2021-08-06 20:39:16,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 12658 transitions. [2021-08-06 20:39:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:16,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:16,397 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, 1] [2021-08-06 20:39:16,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 20:39:16,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:16,598 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:16,598 INFO L82 PathProgramCache]: Analyzing trace with hash -12851524, now seen corresponding path program 65 times [2021-08-06 20:39:16,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:16,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687636744] [2021-08-06 20:39:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:16,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:16,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:16,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687636744] [2021-08-06 20:39:16,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687636744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:16,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191472429] [2021-08-06 20:39:16,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:39:16,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:16,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:16,694 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:16,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:39:21,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:39:21,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:21,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:21,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:21,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191472429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:21,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:21,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:39:21,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938996332] [2021-08-06 20:39:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:39:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:39:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:39:21,578 INFO L87 Difference]: Start difference. First operand 5519 states and 12658 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:21,845 INFO L93 Difference]: Finished difference Result 5780 states and 13188 transitions. [2021-08-06 20:39:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:39:21,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:21,854 INFO L225 Difference]: With dead ends: 5780 [2021-08-06 20:39:21,854 INFO L226 Difference]: Without dead ends: 5780 [2021-08-06 20:39:21,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:39:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2021-08-06 20:39:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5563. [2021-08-06 20:39:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5563 states, 5562 states have (on average 2.293060050341604) internal successors, (12754), 5562 states have internal predecessors, (12754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5563 states to 5563 states and 12754 transitions. [2021-08-06 20:39:21,935 INFO L78 Accepts]: Start accepts. Automaton has 5563 states and 12754 transitions. Word has length 28 [2021-08-06 20:39:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:21,935 INFO L470 AbstractCegarLoop]: Abstraction has 5563 states and 12754 transitions. [2021-08-06 20:39:21,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5563 states and 12754 transitions. [2021-08-06 20:39:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:21,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:21,942 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:21,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:22,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:22,142 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:22,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash 97899188, now seen corresponding path program 27 times [2021-08-06 20:39:22,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:22,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136525869] [2021-08-06 20:39:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:22,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:22,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:22,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136525869] [2021-08-06 20:39:22,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136525869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:22,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504265] [2021-08-06 20:39:22,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:39:22,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:22,253 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:22,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:39:26,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:39:26,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:26,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:39:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:27,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:27,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:27,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:39:27,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547005951] [2021-08-06 20:39:27,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:39:27,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:39:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:39:27,129 INFO L87 Difference]: Start difference. First operand 5563 states and 12754 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:27,414 INFO L93 Difference]: Finished difference Result 8438 states and 18768 transitions. [2021-08-06 20:39:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:39:27,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:27,427 INFO L225 Difference]: With dead ends: 8438 [2021-08-06 20:39:27,427 INFO L226 Difference]: Without dead ends: 8414 [2021-08-06 20:39:27,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:39:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-08-06 20:39:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 5481. [2021-08-06 20:39:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.2910583941605838) internal successors, (12555), 5480 states have internal predecessors, (12555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 12555 transitions. [2021-08-06 20:39:27,518 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 12555 transitions. Word has length 28 [2021-08-06 20:39:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:27,518 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 12555 transitions. [2021-08-06 20:39:27,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 12555 transitions. [2021-08-06 20:39:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:27,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:27,526 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, 1] [2021-08-06 20:39:27,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 20:39:27,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:27,741 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:27,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1025606664, now seen corresponding path program 66 times [2021-08-06 20:39:27,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:27,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707889273] [2021-08-06 20:39:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:27,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:27,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:27,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707889273] [2021-08-06 20:39:27,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707889273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:27,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265463568] [2021-08-06 20:39:27,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:39:27,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:27,823 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:27,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:39:32,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:39:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:32,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:32,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:39:32,562 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:39:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:32,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265463568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:32,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:32,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:39:32,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993661676] [2021-08-06 20:39:32,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:39:32,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:39:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:39:32,592 INFO L87 Difference]: Start difference. First operand 5481 states and 12555 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:32,758 INFO L93 Difference]: Finished difference Result 6658 states and 14924 transitions. [2021-08-06 20:39:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:39:32,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:32,769 INFO L225 Difference]: With dead ends: 6658 [2021-08-06 20:39:32,769 INFO L226 Difference]: Without dead ends: 6654 [2021-08-06 20:39:32,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:39:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-08-06 20:39:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 6438. [2021-08-06 20:39:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 2.281186888302004) internal successors, (14684), 6437 states have internal predecessors, (14684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 14684 transitions. [2021-08-06 20:39:32,858 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 14684 transitions. Word has length 28 [2021-08-06 20:39:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:32,858 INFO L470 AbstractCegarLoop]: Abstraction has 6438 states and 14684 transitions. [2021-08-06 20:39:32,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 14684 transitions. [2021-08-06 20:39:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:32,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:32,867 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, 1] [2021-08-06 20:39:32,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:33,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:33,081 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1339123644, now seen corresponding path program 67 times [2021-08-06 20:39:33,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:33,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690229337] [2021-08-06 20:39:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:33,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:33,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:33,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690229337] [2021-08-06 20:39:33,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690229337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:33,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336533179] [2021-08-06 20:39:33,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:39:33,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:33,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:33,182 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:33,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:39:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:38,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:38,020 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:38,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336533179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:38,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:38,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:39:38,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635428143] [2021-08-06 20:39:38,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:39:38,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:38,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:39:38,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:39:38,055 INFO L87 Difference]: Start difference. First operand 6438 states and 14684 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:38,411 INFO L93 Difference]: Finished difference Result 6625 states and 15037 transitions. [2021-08-06 20:39:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:39:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:38,421 INFO L225 Difference]: With dead ends: 6625 [2021-08-06 20:39:38,421 INFO L226 Difference]: Without dead ends: 6625 [2021-08-06 20:39:38,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:39:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6625 states. [2021-08-06 20:39:38,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6625 to 6479. [2021-08-06 20:39:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 6478 states have (on average 2.2792528558196974) internal successors, (14765), 6478 states have internal predecessors, (14765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 14765 transitions. [2021-08-06 20:39:38,508 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 14765 transitions. Word has length 28 [2021-08-06 20:39:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:38,508 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 14765 transitions. [2021-08-06 20:39:38,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 14765 transitions. [2021-08-06 20:39:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:38,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:38,515 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, 1] [2021-08-06 20:39:38,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:38,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 20:39:38,716 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:38,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2138949308, now seen corresponding path program 68 times [2021-08-06 20:39:38,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:38,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031746198] [2021-08-06 20:39:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:38,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:38,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:38,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031746198] [2021-08-06 20:39:38,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031746198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:38,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667179484] [2021-08-06 20:39:38,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:39:38,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:38,798 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:38,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:39:43,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:39:43,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:43,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:43,551 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:43,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:43,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667179484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:43,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:43,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:39:43,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108263051] [2021-08-06 20:39:43,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:39:43,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:39:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:39:43,587 INFO L87 Difference]: Start difference. First operand 6479 states and 14765 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:43,825 INFO L93 Difference]: Finished difference Result 6672 states and 15151 transitions. [2021-08-06 20:39:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:39:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:43,834 INFO L225 Difference]: With dead ends: 6672 [2021-08-06 20:39:43,834 INFO L226 Difference]: Without dead ends: 6672 [2021-08-06 20:39:43,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:39:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6672 states. [2021-08-06 20:39:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6672 to 6479. [2021-08-06 20:39:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 6478 states have (on average 2.2792528558196974) internal successors, (14765), 6478 states have internal predecessors, (14765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 14765 transitions. [2021-08-06 20:39:43,914 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 14765 transitions. Word has length 28 [2021-08-06 20:39:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:43,914 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 14765 transitions. [2021-08-06 20:39:43,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 14765 transitions. [2021-08-06 20:39:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:43,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:43,921 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, 1] [2021-08-06 20:39:43,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:44,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 20:39:44,121 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash -424171844, now seen corresponding path program 69 times [2021-08-06 20:39:44,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:44,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608478695] [2021-08-06 20:39:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:44,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:44,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:44,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608478695] [2021-08-06 20:39:44,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608478695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:44,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739906359] [2021-08-06 20:39:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:39:44,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:44,221 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:44,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:39:48,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:39:48,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:48,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:49,011 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:49,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:49,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739906359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:49,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:49,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:39:49,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077887622] [2021-08-06 20:39:49,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:39:49,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:39:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:39:49,048 INFO L87 Difference]: Start difference. First operand 6479 states and 14765 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:49,303 INFO L93 Difference]: Finished difference Result 6850 states and 15518 transitions. [2021-08-06 20:39:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:39:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:49,312 INFO L225 Difference]: With dead ends: 6850 [2021-08-06 20:39:49,313 INFO L226 Difference]: Without dead ends: 6850 [2021-08-06 20:39:49,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:39:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-08-06 20:39:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 6475. [2021-08-06 20:39:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6475 states, 6474 states have (on average 2.2791164658634537) internal successors, (14755), 6474 states have internal predecessors, (14755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6475 states to 6475 states and 14755 transitions. [2021-08-06 20:39:49,399 INFO L78 Accepts]: Start accepts. Automaton has 6475 states and 14755 transitions. Word has length 28 [2021-08-06 20:39:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:49,399 INFO L470 AbstractCegarLoop]: Abstraction has 6475 states and 14755 transitions. [2021-08-06 20:39:49,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6475 states and 14755 transitions. [2021-08-06 20:39:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:39:49,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:49,406 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:49,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 20:39:49,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:49,607 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:49,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash -510371878, now seen corresponding path program 70 times [2021-08-06 20:39:49,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:49,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318411117] [2021-08-06 20:39:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:49,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:49,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 79.8 percent of original size [2021-08-06 20:39:49,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 79.8 percent of original size [2021-08-06 20:39:49,891 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 146, result has 61.1 percent of original size [2021-08-06 20:39:49,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 146, result has 61.1 percent of original size [2021-08-06 20:39:50,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 77.8 percent of original size [2021-08-06 20:39:50,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 77.8 percent of original size [2021-08-06 20:39:50,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 103, result has 76.0 percent of original size [2021-08-06 20:39:50,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 103, result has 76.0 percent of original size [2021-08-06 20:39:50,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 74, result has 76.5 percent of original size [2021-08-06 20:39:50,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 74, result has 76.5 percent of original size [2021-08-06 20:39:50,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 71, result has 76.9 percent of original size [2021-08-06 20:39:50,773 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 71, result has 76.9 percent of original size [2021-08-06 20:39:50,904 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 90.2 percent of original size [2021-08-06 20:39:50,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 90.2 percent of original size [2021-08-06 20:39:50,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 26.9 percent of original size [2021-08-06 20:39:50,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 26.9 percent of original size [2021-08-06 20:39:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:51,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:51,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318411117] [2021-08-06 20:39:51,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318411117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:51,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873526510] [2021-08-06 20:39:51,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:39:51,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:51,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:51,010 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:51,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:39:55,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:39:55,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:55,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:39:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:01,442 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:40:01,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-06 20:40:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:02,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873526510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:02,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:02,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:40:02,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465195739] [2021-08-06 20:40:02,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:40:02,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:40:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:40:02,238 INFO L87 Difference]: Start difference. First operand 6475 states and 14755 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:06,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:06,612 INFO L93 Difference]: Finished difference Result 7461 states and 16549 transitions. [2021-08-06 20:40:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:40:06,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:06,624 INFO L225 Difference]: With dead ends: 7461 [2021-08-06 20:40:06,624 INFO L226 Difference]: Without dead ends: 7441 [2021-08-06 20:40:06,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 4514.1ms TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:40:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7441 states. [2021-08-06 20:40:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7441 to 6598. [2021-08-06 20:40:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 2.2817947551917537) internal successors, (15053), 6597 states have internal predecessors, (15053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 15053 transitions. [2021-08-06 20:40:06,714 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 15053 transitions. Word has length 30 [2021-08-06 20:40:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:06,715 INFO L470 AbstractCegarLoop]: Abstraction has 6598 states and 15053 transitions. [2021-08-06 20:40:06,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 15053 transitions. [2021-08-06 20:40:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:06,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:06,722 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:06,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 20:40:06,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:06,922 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash -256582754, now seen corresponding path program 71 times [2021-08-06 20:40:06,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:06,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975354460] [2021-08-06 20:40:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:06,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:07,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 139, result has 44.6 percent of original size [2021-08-06 20:40:07,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 139, result has 44.6 percent of original size [2021-08-06 20:40:07,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 238, result has 55.8 percent of original size [2021-08-06 20:40:07,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 238, result has 55.8 percent of original size [2021-08-06 20:40:07,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 176, result has 75.8 percent of original size [2021-08-06 20:40:07,690 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 176, result has 75.8 percent of original size [2021-08-06 20:40:07,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 181, result has 74.7 percent of original size [2021-08-06 20:40:08,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 181, result has 74.7 percent of original size [2021-08-06 20:40:08,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 128, result has 72.5 percent of original size [2021-08-06 20:40:08,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 128, result has 72.5 percent of original size [2021-08-06 20:40:08,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 128, result has 72.3 percent of original size [2021-08-06 20:40:08,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 128, result has 72.3 percent of original size [2021-08-06 20:40:08,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 202, result has 36.7 percent of original size [2021-08-06 20:40:08,863 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 202, result has 36.7 percent of original size [2021-08-06 20:40:08,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 114, result has 44.4 percent of original size [2021-08-06 20:40:08,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 114, result has 44.4 percent of original size [2021-08-06 20:40:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:09,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975354460] [2021-08-06 20:40:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975354460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650292158] [2021-08-06 20:40:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:40:09,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:09,005 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:40:09,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:40:14,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:40:14,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:40:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:20,570 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:40:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 220 treesize of output 147 [2021-08-06 20:40:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:21,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650292158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:21,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:21,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 20:40:21,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247805649] [2021-08-06 20:40:21,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:40:21,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:21,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:40:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:40:21,535 INFO L87 Difference]: Start difference. First operand 6598 states and 15053 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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) [2021-08-06 20:40:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:26,890 INFO L93 Difference]: Finished difference Result 7183 states and 16079 transitions. [2021-08-06 20:40:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:40:26,891 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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 30 [2021-08-06 20:40:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:26,901 INFO L225 Difference]: With dead ends: 7183 [2021-08-06 20:40:26,901 INFO L226 Difference]: Without dead ends: 7163 [2021-08-06 20:40:26,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 5599.2ms TimeCoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:40:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2021-08-06 20:40:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 6620. [2021-08-06 20:40:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 2.282973258800423) internal successors, (15111), 6619 states have internal predecessors, (15111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 15111 transitions. [2021-08-06 20:40:27,004 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 15111 transitions. Word has length 30 [2021-08-06 20:40:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:27,005 INFO L470 AbstractCegarLoop]: Abstraction has 6620 states and 15111 transitions. [2021-08-06 20:40:27,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 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) [2021-08-06 20:40:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 15111 transitions. [2021-08-06 20:40:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:27,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:27,013 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:27,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 20:40:27,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 20:40:27,213 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:27,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1934847834, now seen corresponding path program 72 times [2021-08-06 20:40:27,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:27,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423341872] [2021-08-06 20:40:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:27,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:27,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2005, result has 5.8 percent of original size [2021-08-06 20:40:27,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2005, result has 5.8 percent of original size [2021-08-06 20:40:27,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2007, result has 12.9 percent of original size [2021-08-06 20:40:27,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2007, result has 12.9 percent of original size [2021-08-06 20:40:28,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2007, result has 13.2 percent of original size [2021-08-06 20:40:28,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2007, result has 13.2 percent of original size [2021-08-06 20:40:28,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3278, result has 16.5 percent of original size [2021-08-06 20:40:29,088 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3278, result has 16.5 percent of original size [2021-08-06 20:40:29,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2849, result has 17.2 percent of original size [2021-08-06 20:40:29,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2849, result has 17.2 percent of original size [2021-08-06 20:40:30,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2075, result has 21.7 percent of original size [2021-08-06 20:40:30,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2075, result has 21.7 percent of original size [2021-08-06 20:40:30,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 822, result has 26.8 percent of original size [2021-08-06 20:40:30,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 822, result has 26.8 percent of original size [2021-08-06 20:40:30,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 46.7 percent of original size [2021-08-06 20:40:30,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 46.7 percent of original size [2021-08-06 20:40:30,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 45.1 percent of original size [2021-08-06 20:40:30,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 45.1 percent of original size [2021-08-06 20:40:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:30,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:30,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423341872] [2021-08-06 20:40:30,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423341872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:30,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451697495] [2021-08-06 20:40:30,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:40:30,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:30,839 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:40:30,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:40:35,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:40:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:40:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:38,782 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:40:38,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 221 treesize of output 145 [2021-08-06 20:40:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:39,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451697495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:39,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:39,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:40:39,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193091896] [2021-08-06 20:40:39,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:40:39,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:40:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:40:39,497 INFO L87 Difference]: Start difference. First operand 6620 states and 15111 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:48,414 INFO L93 Difference]: Finished difference Result 7311 states and 16268 transitions. [2021-08-06 20:40:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:40:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:48,424 INFO L225 Difference]: With dead ends: 7311 [2021-08-06 20:40:48,424 INFO L226 Difference]: Without dead ends: 7301 [2021-08-06 20:40:48,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 9260.0ms TimeCoverageRelationStatistics Valid=393, Invalid=3029, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:40:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-08-06 20:40:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 6634. [2021-08-06 20:40:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 2.283883612241821) internal successors, (15149), 6633 states have internal predecessors, (15149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 15149 transitions. [2021-08-06 20:40:48,507 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 15149 transitions. Word has length 30 [2021-08-06 20:40:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:48,507 INFO L470 AbstractCegarLoop]: Abstraction has 6634 states and 15149 transitions. [2021-08-06 20:40:48,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 15149 transitions. [2021-08-06 20:40:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:48,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:48,515 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:48,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:48,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:48,715 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1019744218, now seen corresponding path program 73 times [2021-08-06 20:40:48,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:48,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949840811] [2021-08-06 20:40:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:48,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:48,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 78.3 percent of original size [2021-08-06 20:40:48,862 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 78.3 percent of original size [2021-08-06 20:40:48,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 293, result has 40.8 percent of original size [2021-08-06 20:40:48,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 293, result has 40.8 percent of original size [2021-08-06 20:40:49,065 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 257, result has 55.1 percent of original size [2021-08-06 20:40:49,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 257, result has 55.1 percent of original size [2021-08-06 20:40:49,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 257, result has 54.8 percent of original size [2021-08-06 20:40:49,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 257, result has 54.8 percent of original size [2021-08-06 20:40:49,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 73, result has 79.6 percent of original size [2021-08-06 20:40:49,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 73, result has 79.6 percent of original size [2021-08-06 20:40:49,710 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 161, result has 39.9 percent of original size [2021-08-06 20:40:49,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 161, result has 39.9 percent of original size [2021-08-06 20:40:49,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 161, result has 39.0 percent of original size [2021-08-06 20:40:49,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 161, result has 39.0 percent of original size [2021-08-06 20:40:49,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 96, result has 26.7 percent of original size [2021-08-06 20:40:49,881 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 96, result has 26.7 percent of original size [2021-08-06 20:40:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:49,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:49,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949840811] [2021-08-06 20:40:49,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949840811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:49,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95258918] [2021-08-06 20:40:49,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:40:49,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:49,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:49,913 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:40:49,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:40:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:55,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:40:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:02,173 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:41:02,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 218 treesize of output 145 [2021-08-06 20:41:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:02,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95258918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:02,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:02,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:41:02,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583830380] [2021-08-06 20:41:03,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:03,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:03,000 INFO L87 Difference]: Start difference. First operand 6634 states and 15149 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:06,367 INFO L93 Difference]: Finished difference Result 8695 states and 19615 transitions. [2021-08-06 20:41:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:41:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:06,380 INFO L225 Difference]: With dead ends: 8695 [2021-08-06 20:41:06,380 INFO L226 Difference]: Without dead ends: 8680 [2021-08-06 20:41:06,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 3165.9ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:41:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-08-06 20:41:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6674. [2021-08-06 20:41:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6674 states, 6673 states have (on average 2.2839802187921476) internal successors, (15241), 6673 states have internal predecessors, (15241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 15241 transitions. [2021-08-06 20:41:06,474 INFO L78 Accepts]: Start accepts. Automaton has 6674 states and 15241 transitions. Word has length 30 [2021-08-06 20:41:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:06,475 INFO L470 AbstractCegarLoop]: Abstraction has 6674 states and 15241 transitions. [2021-08-06 20:41:06,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6674 states and 15241 transitions. [2021-08-06 20:41:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:06,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:06,482 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:06,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:06,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 20:41:06,683 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:06,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1094509922, now seen corresponding path program 74 times [2021-08-06 20:41:06,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:06,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754866015] [2021-08-06 20:41:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:06,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:06,945 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 76.2 percent of original size [2021-08-06 20:41:06,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 76.2 percent of original size [2021-08-06 20:41:07,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 363, result has 48.6 percent of original size [2021-08-06 20:41:07,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 363, result has 48.6 percent of original size [2021-08-06 20:41:07,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 234, result has 73.8 percent of original size [2021-08-06 20:41:07,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 234, result has 73.8 percent of original size [2021-08-06 20:41:07,959 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 244, result has 72.0 percent of original size [2021-08-06 20:41:08,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 244, result has 72.0 percent of original size [2021-08-06 20:41:08,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 335, result has 53.8 percent of original size [2021-08-06 20:41:08,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 335, result has 53.8 percent of original size [2021-08-06 20:41:08,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 62.3 percent of original size [2021-08-06 20:41:08,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 62.3 percent of original size [2021-08-06 20:41:08,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 61.8 percent of original size [2021-08-06 20:41:08,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 61.8 percent of original size [2021-08-06 20:41:08,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 81, result has 17.3 percent of original size [2021-08-06 20:41:08,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 81, result has 17.3 percent of original size [2021-08-06 20:41:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:08,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:08,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754866015] [2021-08-06 20:41:08,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754866015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:08,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142591732] [2021-08-06 20:41:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:41:08,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:08,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:08,911 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:41:08,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:41:14,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:41:14,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:14,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:41:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:18,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:41:18,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 191 [2021-08-06 20:41:25,518 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 93, result has 53.0 percent of original size [2021-08-06 20:41:25,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 93, result has 53.0 percent of original size [2021-08-06 20:41:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:26,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142591732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:26,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:26,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:41:26,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887688411] [2021-08-06 20:41:26,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:41:26,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:41:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:41:26,032 INFO L87 Difference]: Start difference. First operand 6674 states and 15241 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:29,428 INFO L93 Difference]: Finished difference Result 6798 states and 15409 transitions. [2021-08-06 20:41:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:41:29,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:29,437 INFO L225 Difference]: With dead ends: 6798 [2021-08-06 20:41:29,438 INFO L226 Difference]: Without dead ends: 6793 [2021-08-06 20:41:29,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 3461.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:41:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6793 states. [2021-08-06 20:41:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6793 to 6682. [2021-08-06 20:41:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.283340817242928) internal successors, (15255), 6681 states have internal predecessors, (15255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 15255 transitions. [2021-08-06 20:41:29,521 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 15255 transitions. Word has length 30 [2021-08-06 20:41:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:29,521 INFO L470 AbstractCegarLoop]: Abstraction has 6682 states and 15255 transitions. [2021-08-06 20:41:29,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 15255 transitions. [2021-08-06 20:41:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:29,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:29,530 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:29,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 20:41:29,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 20:41:29,731 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:29,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1013060126, now seen corresponding path program 75 times [2021-08-06 20:41:29,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:29,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136629460] [2021-08-06 20:41:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:29,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:29,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 750, result has 13.0 percent of original size [2021-08-06 20:41:29,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 750, result has 13.0 percent of original size [2021-08-06 20:41:30,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 325, result has 48.7 percent of original size [2021-08-06 20:41:30,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 325, result has 48.7 percent of original size [2021-08-06 20:41:30,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 325, result has 49.2 percent of original size [2021-08-06 20:41:30,416 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 325, result has 49.2 percent of original size [2021-08-06 20:41:30,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 427, result has 53.7 percent of original size [2021-08-06 20:41:30,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 427, result has 53.7 percent of original size [2021-08-06 20:41:31,083 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 362, result has 36.9 percent of original size [2021-08-06 20:41:31,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 362, result has 36.9 percent of original size [2021-08-06 20:41:31,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 198, result has 45.5 percent of original size [2021-08-06 20:41:31,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 198, result has 45.5 percent of original size [2021-08-06 20:41:31,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 73.7 percent of original size [2021-08-06 20:41:31,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 73.7 percent of original size [2021-08-06 20:41:31,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 21.7 percent of original size [2021-08-06 20:41:31,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 21.7 percent of original size [2021-08-06 20:41:31,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 19.4 percent of original size [2021-08-06 20:41:31,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 19.4 percent of original size [2021-08-06 20:41:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:31,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:31,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136629460] [2021-08-06 20:41:31,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136629460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:31,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089169120] [2021-08-06 20:41:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:41:31,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:31,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:31,664 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:41:31,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:41:37,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:41:37,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:37,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 20:41:37,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:40,176 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 20:41:40,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 223 treesize of output 181 [2021-08-06 20:41:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:48,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089169120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:48,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:48,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:41:48,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498632123] [2021-08-06 20:41:48,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:41:48,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:41:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:41:48,693 INFO L87 Difference]: Start difference. First operand 6682 states and 15255 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:57,621 INFO L93 Difference]: Finished difference Result 7398 states and 16447 transitions. [2021-08-06 20:41:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 20:41:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:57,632 INFO L225 Difference]: With dead ends: 7398 [2021-08-06 20:41:57,632 INFO L226 Difference]: Without dead ends: 7388 [2021-08-06 20:41:57,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 9252.9ms TimeCoverageRelationStatistics Valid=452, Invalid=3330, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:41:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-08-06 20:41:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6697. [2021-08-06 20:41:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6697 states, 6696 states have (on average 2.2830047789725207) internal successors, (15287), 6696 states have internal predecessors, (15287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6697 states to 6697 states and 15287 transitions. [2021-08-06 20:41:57,738 INFO L78 Accepts]: Start accepts. Automaton has 6697 states and 15287 transitions. Word has length 30 [2021-08-06 20:41:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:57,739 INFO L470 AbstractCegarLoop]: Abstraction has 6697 states and 15287 transitions. [2021-08-06 20:41:57,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 6697 states and 15287 transitions. [2021-08-06 20:41:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:57,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:57,747 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:57,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:57,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 20:41:57,947 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1266849250, now seen corresponding path program 76 times [2021-08-06 20:41:57,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:57,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187552574] [2021-08-06 20:41:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:57,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:58,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 76.9 percent of original size [2021-08-06 20:41:58,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 76.9 percent of original size [2021-08-06 20:41:58,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 65.4 percent of original size [2021-08-06 20:41:58,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 65.4 percent of original size [2021-08-06 20:41:58,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 65.9 percent of original size [2021-08-06 20:41:58,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 65.9 percent of original size [2021-08-06 20:41:58,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 144, result has 75.6 percent of original size [2021-08-06 20:41:58,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 144, result has 75.6 percent of original size [2021-08-06 20:41:59,108 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 144, result has 75.2 percent of original size [2021-08-06 20:41:59,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 144, result has 75.2 percent of original size [2021-08-06 20:41:59,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 66.6 percent of original size [2021-08-06 20:41:59,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 66.6 percent of original size [2021-08-06 20:41:59,643 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 66.3 percent of original size [2021-08-06 20:41:59,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 66.3 percent of original size [2021-08-06 20:41:59,834 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 161, result has 37.4 percent of original size [2021-08-06 20:41:59,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 161, result has 37.4 percent of original size [2021-08-06 20:41:59,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 49.2 percent of original size [2021-08-06 20:41:59,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 49.2 percent of original size [2021-08-06 20:41:59,959 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 45.0 percent of original size [2021-08-06 20:41:59,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 45.0 percent of original size [2021-08-06 20:41:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:59,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:59,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187552574] [2021-08-06 20:41:59,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187552574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:59,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553395661] [2021-08-06 20:41:59,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:41:59,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:59,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:59,992 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:00,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:42:05,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:42:05,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:05,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:42:05,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:15,110 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-06 20:42:15,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 164 [2021-08-06 20:42:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:15,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553395661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:15,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:15,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:42:15,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546287120] [2021-08-06 20:42:15,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:42:15,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:15,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:42:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:42:15,880 INFO L87 Difference]: Start difference. First operand 6697 states and 15287 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:23,389 INFO L93 Difference]: Finished difference Result 8690 states and 19660 transitions. [2021-08-06 20:42:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:42:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:42:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:23,401 INFO L225 Difference]: With dead ends: 8690 [2021-08-06 20:42:23,401 INFO L226 Difference]: Without dead ends: 8680 [2021-08-06 20:42:23,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 7545.6ms TimeCoverageRelationStatistics Valid=532, Invalid=3628, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 20:42:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-08-06 20:42:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6721. [2021-08-06 20:42:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6721 states, 6720 states have (on average 2.2819940476190474) internal successors, (15335), 6720 states have internal predecessors, (15335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6721 states to 6721 states and 15335 transitions. [2021-08-06 20:42:23,492 INFO L78 Accepts]: Start accepts. Automaton has 6721 states and 15335 transitions. Word has length 30 [2021-08-06 20:42:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:23,492 INFO L470 AbstractCegarLoop]: Abstraction has 6721 states and 15335 transitions. [2021-08-06 20:42:23,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6721 states and 15335 transitions. [2021-08-06 20:42:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:23,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:23,500 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:23,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:23,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:23,701 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:23,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1851087142, now seen corresponding path program 28 times [2021-08-06 20:42:23,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:23,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082308094] [2021-08-06 20:42:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:23,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:23,830 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 200, result has 16.0 percent of original size [2021-08-06 20:42:23,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 200, result has 16.0 percent of original size [2021-08-06 20:42:23,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 239, result has 26.2 percent of original size [2021-08-06 20:42:23,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 239, result has 26.2 percent of original size [2021-08-06 20:42:23,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 394, result has 37.1 percent of original size [2021-08-06 20:42:24,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 394, result has 37.1 percent of original size [2021-08-06 20:42:24,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 424, result has 37.2 percent of original size [2021-08-06 20:42:24,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 424, result has 37.2 percent of original size [2021-08-06 20:42:24,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 491, result has 40.5 percent of original size [2021-08-06 20:42:24,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 491, result has 40.5 percent of original size [2021-08-06 20:42:25,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 397, result has 44.2 percent of original size [2021-08-06 20:42:25,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 397, result has 44.2 percent of original size [2021-08-06 20:42:25,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 164, result has 58.4 percent of original size [2021-08-06 20:42:25,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 164, result has 58.4 percent of original size [2021-08-06 20:42:25,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 88.1 percent of original size [2021-08-06 20:42:25,562 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 88.1 percent of original size [2021-08-06 20:42:25,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 58.0 percent of original size [2021-08-06 20:42:25,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 58.0 percent of original size [2021-08-06 20:42:25,725 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 55.8 percent of original size [2021-08-06 20:42:25,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 55.8 percent of original size [2021-08-06 20:42:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:25,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:25,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082308094] [2021-08-06 20:42:25,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082308094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:25,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916800545] [2021-08-06 20:42:25,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:42:25,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:25,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:25,779 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:25,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:42:31,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:42:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:42:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:34,582 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:42:34,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 256 treesize of output 157 [2021-08-06 20:42:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:34,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916800545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:34,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:34,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-06 20:42:34,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295843243] [2021-08-06 20:42:34,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:42:34,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:34,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:42:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:42:34,892 INFO L87 Difference]: Start difference. First operand 6721 states and 15335 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:41,879 INFO L93 Difference]: Finished difference Result 6765 states and 15389 transitions. [2021-08-06 20:42:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:42:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:42:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:41,887 INFO L225 Difference]: With dead ends: 6765 [2021-08-06 20:42:41,888 INFO L226 Difference]: Without dead ends: 6760 [2021-08-06 20:42:41,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 7497.6ms TimeCoverageRelationStatistics Valid=417, Invalid=2339, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:42:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2021-08-06 20:42:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6725. [2021-08-06 20:42:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 2.2813801308744797) internal successors, (15340), 6724 states have internal predecessors, (15340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 15340 transitions. [2021-08-06 20:42:41,968 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 15340 transitions. Word has length 30 [2021-08-06 20:42:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:41,969 INFO L470 AbstractCegarLoop]: Abstraction has 6725 states and 15340 transitions. [2021-08-06 20:42:41,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 15340 transitions. [2021-08-06 20:42:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:41,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:41,977 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:42,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:42,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:42,177 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1647853274, now seen corresponding path program 29 times [2021-08-06 20:42:42,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:42,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702830289] [2021-08-06 20:42:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:42,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:42,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 318, result has 10.7 percent of original size [2021-08-06 20:42:42,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 318, result has 10.7 percent of original size [2021-08-06 20:42:42,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 374, result has 20.1 percent of original size [2021-08-06 20:42:42,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 374, result has 20.1 percent of original size [2021-08-06 20:42:42,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 576, result has 28.2 percent of original size [2021-08-06 20:42:42,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 576, result has 28.2 percent of original size [2021-08-06 20:42:42,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 620, result has 28.3 percent of original size [2021-08-06 20:42:42,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 620, result has 28.3 percent of original size [2021-08-06 20:42:43,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 772, result has 29.0 percent of original size [2021-08-06 20:42:43,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 772, result has 29.0 percent of original size [2021-08-06 20:42:43,509 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 414, result has 36.4 percent of original size [2021-08-06 20:42:43,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 414, result has 36.4 percent of original size [2021-08-06 20:42:43,770 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 78.2 percent of original size [2021-08-06 20:42:43,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 78.2 percent of original size [2021-08-06 20:42:43,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 97.0 percent of original size [2021-08-06 20:42:43,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 97.0 percent of original size [2021-08-06 20:42:44,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 61.4 percent of original size [2021-08-06 20:42:44,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 61.4 percent of original size [2021-08-06 20:42:44,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 57.7 percent of original size [2021-08-06 20:42:44,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 57.7 percent of original size [2021-08-06 20:42:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:44,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:44,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702830289] [2021-08-06 20:42:44,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702830289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:44,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298464133] [2021-08-06 20:42:44,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:42:44,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:44,117 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:44,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:42:50,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:42:50,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 20:42:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-06 20:42:50,378 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:42:50,381 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:42:50,391 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 [2021-08-06 20:42:50,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:50,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 20:42:50,578 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. [2021-08-06 20:42:50,580 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:42:50,580 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:42:50,580 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:42:50,584 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:42:50,584 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:42:50,585 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:42:50 BasicIcfg [2021-08-06 20:42:50,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:42:50,586 INFO L168 Benchmark]: Toolchain (without parser) took 702365.53 ms. Allocated memory was 170.9 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 151.0 MB in the beginning and 548.6 MB in the end (delta: -397.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-08-06 20:42:50,586 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.57 ms. Allocated memory is still 170.9 MB. Free memory was 152.3 MB in the beginning and 152.2 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:42:50,586 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.86 ms. Allocated memory is still 170.9 MB. Free memory was 151.0 MB in the beginning and 149.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:42:50,586 INFO L168 Benchmark]: Boogie Preprocessor took 22.75 ms. Allocated memory is still 170.9 MB. Free memory was 149.6 MB in the beginning and 148.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:42:50,586 INFO L168 Benchmark]: RCFGBuilder took 268.93 ms. Allocated memory is still 170.9 MB. Free memory was 148.5 MB in the beginning and 135.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:42:50,587 INFO L168 Benchmark]: TraceAbstraction took 702039.63 ms. Allocated memory was 170.9 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 134.8 MB in the beginning and 548.6 MB in the end (delta: -413.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-06 20:42:50,587 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 0.57 ms. Allocated memory is still 170.9 MB. Free memory was 152.3 MB in the beginning and 152.2 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.86 ms. Allocated memory is still 170.9 MB. Free memory was 151.0 MB in the beginning and 149.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.75 ms. Allocated memory is still 170.9 MB. Free memory was 149.6 MB in the beginning and 148.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 268.93 ms. Allocated memory is still 170.9 MB. Free memory was 148.5 MB in the beginning and 135.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 702039.63 ms. Allocated memory was 170.9 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 134.8 MB in the beginning and 548.6 MB in the end (delta: -413.8 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 701893.0ms, OverallIterations: 108, TraceHistogramMax: 3, EmptinessCheckTime: 274.7ms, AutomataDifference: 138522.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 108.5ms, PartialOrderReductionTime: 94.6ms, HoareTripleCheckerStatistics: 2667 SDtfs, 16415 SDslu, 18052 SDs, 0 SdLazy, 38752 SolverSat, 3457 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23102.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5776 GetRequests, 2188 SyntacticMatches, 115 SemanticMatches, 3473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40958 ImplicationChecksByTransitivity, 136508.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6725occurred in iteration=107, InterpolantAutomatonStates: 2793, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2948.2ms AutomataMinimizationTime, 107 MinimizatonAttempts, 48866 StatesRemovedByMinimization, 107 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 395.5ms SsaConstructionTime, 1943.1ms SatisfiabilityAnalysisTime, 195831.5ms InterpolantComputationTime, 5662 NumberOfCodeBlocks, 5662 NumberOfCodeBlocksAsserted, 340 NumberOfCheckSat, 5451 ConstructedInterpolants, 92 QuantifiedInterpolants, 124501 SizeOfPredicates, 501 NumberOfNonLiveVariables, 7317 ConjunctsInSsa, 1734 ConjunctsInUnsatCore, 211 InterpolantComputations, 3 PerfectInterpolantSequences, 374/1740 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