/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-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:20:23,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:20:23,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:20:23,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 20:20:23,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:20:23,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:20:23,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:20:23,720 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 20:20:23,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:20:23,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:20:23,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:20:23,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:20:23,737 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:20:23,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:20:23,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:20:23,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:20:23,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:20:23,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:20:23,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:20:23,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:20:23,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:20:23,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:20:23,740 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:20:23,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:20:23,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:20:24,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:20:24,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:20:24,010 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:20:24,011 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:20:24,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2021-08-06 20:20:24,012 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-08-06 20:20:24,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:20:24,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:20:24,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:20:24,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:20:24,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:20:24,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:20:24,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:20:24,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:20:24,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:20:24,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:20:24,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:20:24,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:20:24,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:20:24,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/1) ... [2021-08-06 20:20:24,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:20:24,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:24,113 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 20:20:24,133 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 20:20:24,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:20:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:20:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:20:24,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:20:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:20:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:20:24,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:20:24,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:20:24,146 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:20:24,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:20:24,147 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 20:20:24,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:20:24,460 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:20:24,462 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:20:24 BoogieIcfgContainer [2021-08-06 20:20:24,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:20:24,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:20:24,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:20:24,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:20:24,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:20:24" (1/2) ... [2021-08-06 20:20:24,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f546741 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:20:24, skipping insertion in model container [2021-08-06 20:20:24,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:20:24" (2/2) ... [2021-08-06 20:20:24,467 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-08-06 20:20:24,471 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:20:24,471 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:20:24,471 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:20:24,471 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:20:24,512 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:20:24,542 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:20:24,546 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 20:20:24,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:20:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 1005 states, 832 states have (on average 1.4963942307692308) internal successors, (1245), 1004 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:20:24,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:24,781 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 20:20:24,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2099862062, now seen corresponding path program 1 times [2021-08-06 20:20:24,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:24,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822450122] [2021-08-06 20:20:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:24,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:24,913 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 20:20:24,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:24,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822450122] [2021-08-06 20:20:24,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822450122] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:24,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:24,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:20:24,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057216855] [2021-08-06 20:20:24,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:20:24,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:20:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:24,933 INFO L87 Difference]: Start difference. First operand has 1005 states, 832 states have (on average 1.4963942307692308) internal successors, (1245), 1004 states have internal predecessors, (1245), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:24,971 INFO L93 Difference]: Finished difference Result 1114 states and 1380 transitions. [2021-08-06 20:20:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:20:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 20:20:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:24,990 INFO L225 Difference]: With dead ends: 1114 [2021-08-06 20:20:24,991 INFO L226 Difference]: Without dead ends: 477 [2021-08-06 20:20:24,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-08-06 20:20:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2021-08-06 20:20:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.4222689075630253) internal successors, (677), 476 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 677 transitions. [2021-08-06 20:20:25,049 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 677 transitions. Word has length 22 [2021-08-06 20:20:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:25,049 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 677 transitions. [2021-08-06 20:20:25,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 677 transitions. [2021-08-06 20:20:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:20:25,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:25,051 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, 1, 1, 1] [2021-08-06 20:20:25,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:20:25,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2146958085, now seen corresponding path program 1 times [2021-08-06 20:20:25,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:25,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74216501] [2021-08-06 20:20:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:25,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:25,122 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 20:20:25,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:25,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74216501] [2021-08-06 20:20:25,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74216501] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:25,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:25,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:20:25,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490822441] [2021-08-06 20:20:25,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:20:25,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:20:25,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,125 INFO L87 Difference]: Start difference. First operand 477 states and 677 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:25,134 INFO L93 Difference]: Finished difference Result 541 states and 741 transitions. [2021-08-06 20:20:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:20:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:20:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:25,136 INFO L225 Difference]: With dead ends: 541 [2021-08-06 20:20:25,136 INFO L226 Difference]: Without dead ends: 541 [2021-08-06 20:20:25,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-06 20:20:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 478. [2021-08-06 20:20:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.421383647798742) internal successors, (678), 477 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 678 transitions. [2021-08-06 20:20:25,149 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 678 transitions. Word has length 27 [2021-08-06 20:20:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:25,149 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 678 transitions. [2021-08-06 20:20:25,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 678 transitions. [2021-08-06 20:20:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:20:25,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:25,151 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:25,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:20:25,151 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:25,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:25,152 INFO L82 PathProgramCache]: Analyzing trace with hash -80347431, now seen corresponding path program 1 times [2021-08-06 20:20:25,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:25,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82619246] [2021-08-06 20:20:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:25,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:25,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:25,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82619246] [2021-08-06 20:20:25,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82619246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:25,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:25,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:20:25,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639484645] [2021-08-06 20:20:25,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:20:25,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:20:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,190 INFO L87 Difference]: Start difference. First operand 478 states and 678 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 20:20:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:25,198 INFO L93 Difference]: Finished difference Result 518 states and 694 transitions. [2021-08-06 20:20:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:20:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 32 [2021-08-06 20:20:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:25,201 INFO L225 Difference]: With dead ends: 518 [2021-08-06 20:20:25,201 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 20:20:25,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 20:20:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2021-08-06 20:20:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.397752808988764) internal successors, (622), 445 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 622 transitions. [2021-08-06 20:20:25,217 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 622 transitions. Word has length 32 [2021-08-06 20:20:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:25,218 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 622 transitions. [2021-08-06 20:20:25,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 20:20:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 622 transitions. [2021-08-06 20:20:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 20:20:25,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:25,219 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:25,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:20:25,219 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:25,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1829561719, now seen corresponding path program 2 times [2021-08-06 20:20:25,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:25,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531284291] [2021-08-06 20:20:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:25,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:20:25,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:25,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531284291] [2021-08-06 20:20:25,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531284291] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:25,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:25,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:20:25,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059601726] [2021-08-06 20:20:25,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:20:25,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:20:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,264 INFO L87 Difference]: Start difference. First operand 446 states and 622 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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 20:20:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:25,271 INFO L93 Difference]: Finished difference Result 830 states and 1160 transitions. [2021-08-06 20:20:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:20:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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 32 [2021-08-06 20:20:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:25,273 INFO L225 Difference]: With dead ends: 830 [2021-08-06 20:20:25,273 INFO L226 Difference]: Without dead ends: 662 [2021-08-06 20:20:25,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-08-06 20:20:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 500. [2021-08-06 20:20:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.3987975951903808) internal successors, (698), 499 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 698 transitions. [2021-08-06 20:20:25,283 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 698 transitions. Word has length 32 [2021-08-06 20:20:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:25,287 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 698 transitions. [2021-08-06 20:20:25,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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 20:20:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 698 transitions. [2021-08-06 20:20:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:20:25,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:25,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:25,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 20:20:25,290 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1665720250, now seen corresponding path program 1 times [2021-08-06 20:20:25,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:25,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477856508] [2021-08-06 20:20:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:25,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:20:25,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:25,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477856508] [2021-08-06 20:20:25,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477856508] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:25,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:20:25,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:20:25,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278400443] [2021-08-06 20:20:25,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:20:25,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:20:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,339 INFO L87 Difference]: Start difference. First operand 500 states and 698 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 20:20:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:25,352 INFO L93 Difference]: Finished difference Result 448 states and 597 transitions. [2021-08-06 20:20:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:20:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 37 [2021-08-06 20:20:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:25,354 INFO L225 Difference]: With dead ends: 448 [2021-08-06 20:20:25,354 INFO L226 Difference]: Without dead ends: 448 [2021-08-06 20:20:25,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:20:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-08-06 20:20:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 385. [2021-08-06 20:20:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.390625) internal successors, (534), 384 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 534 transitions. [2021-08-06 20:20:25,361 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 534 transitions. Word has length 37 [2021-08-06 20:20:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:25,361 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 534 transitions. [2021-08-06 20:20:25,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 20:20:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 534 transitions. [2021-08-06 20:20:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:20:25,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:25,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:25,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 20:20:25,363 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:25,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:25,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1113914118, now seen corresponding path program 2 times [2021-08-06 20:20:25,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:25,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560700392] [2021-08-06 20:20:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:25,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:25,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:25,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560700392] [2021-08-06 20:20:25,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560700392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:25,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716718669] [2021-08-06 20:20:25,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:20:25,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:25,505 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 20:20:25,518 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 20:20:25,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:25,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:25,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:20:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:25,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:20:25,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:25,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:25,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716718669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:25,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:25,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 20:20:25,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839390948] [2021-08-06 20:20:25,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:20:25,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:25,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:20:25,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:20:25,921 INFO L87 Difference]: Start difference. First operand 385 states and 534 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 20:20:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:25,996 INFO L93 Difference]: Finished difference Result 488 states and 675 transitions. [2021-08-06 20:20:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:20:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 37 [2021-08-06 20:20:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:26,003 INFO L225 Difference]: With dead ends: 488 [2021-08-06 20:20:26,004 INFO L226 Difference]: Without dead ends: 482 [2021-08-06 20:20:26,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:20:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-06 20:20:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 440. [2021-08-06 20:20:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.3895216400911161) internal successors, (610), 439 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 610 transitions. [2021-08-06 20:20:26,014 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 610 transitions. Word has length 37 [2021-08-06 20:20:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:26,015 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 610 transitions. [2021-08-06 20:20:26,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 20:20:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 610 transitions. [2021-08-06 20:20:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 20:20:26,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:26,016 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:26,038 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 20:20:26,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-06 20:20:26,221 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:26,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:26,222 INFO L82 PathProgramCache]: Analyzing trace with hash -221613805, now seen corresponding path program 3 times [2021-08-06 20:20:26,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:26,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013793400] [2021-08-06 20:20:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:26,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:26,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:26,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013793400] [2021-08-06 20:20:26,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013793400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:26,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499804022] [2021-08-06 20:20:26,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:20:26,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:26,373 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 20:20:26,396 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 20:20:26,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:20:26,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:20:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:26,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 20:20:26,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:20:26,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:26,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:20:26,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499804022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:26,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:26,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:20:26,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116476861] [2021-08-06 20:20:26,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:20:26,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:26,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:20:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:20:26,866 INFO L87 Difference]: Start difference. First operand 440 states and 610 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:27,004 INFO L93 Difference]: Finished difference Result 827 states and 1174 transitions. [2021-08-06 20:20:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:20:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 20:20:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:27,007 INFO L225 Difference]: With dead ends: 827 [2021-08-06 20:20:27,007 INFO L226 Difference]: Without dead ends: 827 [2021-08-06 20:20:27,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:20:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-06 20:20:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 552. [2021-08-06 20:20:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.600725952813067) internal successors, (882), 551 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 882 transitions. [2021-08-06 20:20:27,019 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 882 transitions. Word has length 42 [2021-08-06 20:20:27,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:27,019 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 882 transitions. [2021-08-06 20:20:27,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 882 transitions. [2021-08-06 20:20:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 20:20:27,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:27,020 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:27,039 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 20:20:27,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-06 20:20:27,229 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1082669603, now seen corresponding path program 4 times [2021-08-06 20:20:27,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:27,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137044652] [2021-08-06 20:20:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:27,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:20:27,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:27,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137044652] [2021-08-06 20:20:27,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137044652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:27,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59871246] [2021-08-06 20:20:27,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:20:27,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:27,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:27,287 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 20:20:27,296 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 20:20:27,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:20:27,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:20:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:27,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:20:27,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:20:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:20:27,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59871246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:27,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 20:20:27,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-06 20:20:27,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12922391] [2021-08-06 20:20:27,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:20:27,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:20:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:27,582 INFO L87 Difference]: Start difference. First operand 552 states and 882 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 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 20:20:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:27,592 INFO L93 Difference]: Finished difference Result 1106 states and 1678 transitions. [2021-08-06 20:20:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:20:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 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 47 [2021-08-06 20:20:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:27,595 INFO L225 Difference]: With dead ends: 1106 [2021-08-06 20:20:27,595 INFO L226 Difference]: Without dead ends: 868 [2021-08-06 20:20:27,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-08-06 20:20:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 854. [2021-08-06 20:20:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 1.6553341148886285) internal successors, (1412), 853 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1412 transitions. [2021-08-06 20:20:27,610 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1412 transitions. Word has length 47 [2021-08-06 20:20:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:27,610 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1412 transitions. [2021-08-06 20:20:27,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 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 20:20:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1412 transitions. [2021-08-06 20:20:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 20:20:27,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:27,618 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:27,639 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 20:20:27,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:27,836 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash -540734095, now seen corresponding path program 5 times [2021-08-06 20:20:27,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:27,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038950568] [2021-08-06 20:20:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:27,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:28,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 20:20:28,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 20:20:28,084 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:20:28,085 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:20:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:20:28,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038950568] [2021-08-06 20:20:28,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038950568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001605065] [2021-08-06 20:20:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:20:28,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:28,105 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 20:20:28,136 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 20:20:28,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:20:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:28,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 20:20:28,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 20:20:28,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:20:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:20:28,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001605065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:28,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:28,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:20:28,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528646911] [2021-08-06 20:20:28,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:20:28,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:20:28,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:20:28,859 INFO L87 Difference]: Start difference. First operand 854 states and 1412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:28,998 INFO L93 Difference]: Finished difference Result 1825 states and 3065 transitions. [2021-08-06 20:20:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:20:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 20:20:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:29,003 INFO L225 Difference]: With dead ends: 1825 [2021-08-06 20:20:29,003 INFO L226 Difference]: Without dead ends: 1526 [2021-08-06 20:20:29,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:20:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-08-06 20:20:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1238. [2021-08-06 20:20:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 1.67178658043654) internal successors, (2068), 1237 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2068 transitions. [2021-08-06 20:20:29,024 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2068 transitions. Word has length 47 [2021-08-06 20:20:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:29,025 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2068 transitions. [2021-08-06 20:20:29,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2068 transitions. [2021-08-06 20:20:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 20:20:29,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:29,027 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:29,046 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 20:20:29,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:29,241 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1601574354, now seen corresponding path program 6 times [2021-08-06 20:20:29,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:29,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987965299] [2021-08-06 20:20:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:29,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 20:20:29,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:29,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987965299] [2021-08-06 20:20:29,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987965299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:29,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637685551] [2021-08-06 20:20:29,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:20:29,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:29,292 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 20:20:29,293 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 20:20:29,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:20:29,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:20:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:29,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:20:29,525 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:20:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 20:20:29,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637685551] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:20:29,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 20:20:29,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-06 20:20:29,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649502622] [2021-08-06 20:20:29,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:20:29,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:29,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:20:29,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:29,616 INFO L87 Difference]: Start difference. First operand 1238 states and 2068 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 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 20:20:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:29,632 INFO L93 Difference]: Finished difference Result 2825 states and 4086 transitions. [2021-08-06 20:20:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:20:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 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 52 [2021-08-06 20:20:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:29,642 INFO L225 Difference]: With dead ends: 2825 [2021-08-06 20:20:29,643 INFO L226 Difference]: Without dead ends: 2821 [2021-08-06 20:20:29,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:20:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-08-06 20:20:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 1799. [2021-08-06 20:20:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 1.5778642936596219) internal successors, (2837), 1798 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2837 transitions. [2021-08-06 20:20:29,679 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2837 transitions. Word has length 52 [2021-08-06 20:20:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:29,680 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2837 transitions. [2021-08-06 20:20:29,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 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 20:20:29,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2837 transitions. [2021-08-06 20:20:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 20:20:29,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:29,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:29,702 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 20:20:29,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 20:20:29,897 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:29,897 INFO L82 PathProgramCache]: Analyzing trace with hash 309279506, now seen corresponding path program 7 times [2021-08-06 20:20:29,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:29,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681099440] [2021-08-06 20:20:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:29,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:29,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 48.9 percent of original size [2021-08-06 20:20:29,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 48.9 percent of original size [2021-08-06 20:20:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:30,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:30,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681099440] [2021-08-06 20:20:30,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681099440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:30,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838133260] [2021-08-06 20:20:30,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:20:30,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:30,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:30,025 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 20:20:30,044 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 20:20:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:30,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 20:20:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:30,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:20:30,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:30,449 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:20:30,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838133260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:30,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:30,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-08-06 20:20:30,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502290281] [2021-08-06 20:20:30,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:20:30,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:20:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:20:30,491 INFO L87 Difference]: Start difference. First operand 1799 states and 2837 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:30,576 INFO L93 Difference]: Finished difference Result 189 states and 255 transitions. [2021-08-06 20:20:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:20:30,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 20:20:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:30,577 INFO L225 Difference]: With dead ends: 189 [2021-08-06 20:20:30,577 INFO L226 Difference]: Without dead ends: 177 [2021-08-06 20:20:30,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:20:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-06 20:20:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-08-06 20:20:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.3579545454545454) internal successors, (239), 176 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2021-08-06 20:20:30,580 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 52 [2021-08-06 20:20:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:30,580 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2021-08-06 20:20:30,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2021-08-06 20:20:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 20:20:30,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:30,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:30,608 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 20:20:30,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:30,798 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -786675205, now seen corresponding path program 8 times [2021-08-06 20:20:30,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:30,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702542518] [2021-08-06 20:20:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:30,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:30,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 52.1 percent of original size [2021-08-06 20:20:30,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 52.1 percent of original size [2021-08-06 20:20:30,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 60.0 percent of original size [2021-08-06 20:20:30,921 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 60.0 percent of original size [2021-08-06 20:20:30,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 52.2 percent of original size [2021-08-06 20:20:30,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 52.2 percent of original size [2021-08-06 20:20:30,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 66.7 percent of original size [2021-08-06 20:20:30,965 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 66.7 percent of original size [2021-08-06 20:20:30,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:20:30,983 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 63.3 percent of original size [2021-08-06 20:20:30,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 60.7 percent of original size [2021-08-06 20:20:31,001 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 60.7 percent of original size [2021-08-06 20:20:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:20:31,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:31,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702542518] [2021-08-06 20:20:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702542518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:31,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448403833] [2021-08-06 20:20:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:20:31,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:31,067 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 20:20:31,068 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 20:20:31,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:31,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:20:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:31,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 20:20:31,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:20:31,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:31,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 31.3 percent of original size [2021-08-06 20:20:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:20:31,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448403833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:31,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:31,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2021-08-06 20:20:31,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964039087] [2021-08-06 20:20:31,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:20:31,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:20:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:20:31,639 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:31,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:31,932 INFO L93 Difference]: Finished difference Result 177 states and 238 transitions. [2021-08-06 20:20:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:20:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 20:20:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:31,933 INFO L225 Difference]: With dead ends: 177 [2021-08-06 20:20:31,933 INFO L226 Difference]: Without dead ends: 177 [2021-08-06 20:20:31,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:20:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-06 20:20:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-08-06 20:20:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.3522727272727273) internal successors, (238), 176 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 238 transitions. [2021-08-06 20:20:31,936 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 238 transitions. Word has length 57 [2021-08-06 20:20:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:31,936 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 238 transitions. [2021-08-06 20:20:31,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:31,937 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 238 transitions. [2021-08-06 20:20:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 20:20:31,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:31,937 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:31,959 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 20:20:32,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:32,145 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1857979785, now seen corresponding path program 9 times [2021-08-06 20:20:32,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:32,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569902680] [2021-08-06 20:20:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:32,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:32,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:20:32,298 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:20:32,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 69.0 percent of original size [2021-08-06 20:20:32,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 69.0 percent of original size [2021-08-06 20:20:32,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 60.2 percent of original size [2021-08-06 20:20:32,374 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 60.2 percent of original size [2021-08-06 20:20:32,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 66.0 percent of original size [2021-08-06 20:20:32,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 66.0 percent of original size [2021-08-06 20:20:32,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 58.0 percent of original size [2021-08-06 20:20:32,479 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 58.0 percent of original size [2021-08-06 20:20:32,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 57.7 percent of original size [2021-08-06 20:20:32,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 57.7 percent of original size [2021-08-06 20:20:32,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 66.7 percent of original size [2021-08-06 20:20:32,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 66.7 percent of original size [2021-08-06 20:20:32,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 60.9 percent of original size [2021-08-06 20:20:32,649 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 60.9 percent of original size [2021-08-06 20:20:32,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 59.7 percent of original size [2021-08-06 20:20:32,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 59.7 percent of original size [2021-08-06 20:20:32,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 68.9 percent of original size [2021-08-06 20:20:32,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 68.9 percent of original size [2021-08-06 20:20:32,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 69.6 percent of original size [2021-08-06 20:20:32,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 69.6 percent of original size [2021-08-06 20:20:32,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:20:32,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:20:32,798 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 65.9 percent of original size [2021-08-06 20:20:32,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 65.9 percent of original size [2021-08-06 20:20:32,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 20:20:32,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 20:20:32,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 20:20:32,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 20:20:32,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 66.7 percent of original size [2021-08-06 20:20:32,901 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 66.7 percent of original size [2021-08-06 20:20:32,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:20:32,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:20:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:32,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:32,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569902680] [2021-08-06 20:20:32,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569902680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:32,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383703780] [2021-08-06 20:20:32,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:20:32,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:32,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:32,945 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 20:20:32,976 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 20:20:33,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:20:33,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:20:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:34,182 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:20:34,182 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 31 treesize of output 19 [2021-08-06 20:20:34,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 80.0 percent of original size [2021-08-06 20:20:34,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 80.0 percent of original size [2021-08-06 20:20:34,536 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 20:20:34,536 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 41 treesize of output 30 [2021-08-06 20:20:34,663 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 20:20:34,664 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 47 treesize of output 23 [2021-08-06 20:20:34,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 47.6 percent of original size [2021-08-06 20:20:34,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 47.6 percent of original size [2021-08-06 20:20:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383703780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:35,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:35,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2021-08-06 20:20:35,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833860978] [2021-08-06 20:20:35,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 20:20:35,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 20:20:35,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:20:35,065 INFO L87 Difference]: Start difference. First operand 177 states and 238 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:36,718 INFO L93 Difference]: Finished difference Result 175 states and 236 transitions. [2021-08-06 20:20:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:20:36,718 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 20:20:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:36,719 INFO L225 Difference]: With dead ends: 175 [2021-08-06 20:20:36,719 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 20:20:36,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2029.1ms TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:20:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 20:20:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 20:20:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 20:20:36,720 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-08-06 20:20:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:36,720 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 20:20:36,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 20:20:36,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 20:20:36,722 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:20:36,722 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:20:36,722 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:20:36,722 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:20:36,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-06 20:20:36,932 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,SelfDestructingSolverStorable12 [2021-08-06 20:20:36,936 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:20:36,936 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:20:36,937 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:20:36 BasicIcfg [2021-08-06 20:20:36,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:20:36,937 INFO L168 Benchmark]: Toolchain (without parser) took 12895.67 ms. Allocated memory was 202.4 MB in the beginning and 402.7 MB in the end (delta: 200.3 MB). Free memory was 182.0 MB in the beginning and 199.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 185.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:36,938 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 202.4 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:20:36,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.54 ms. Allocated memory is still 202.4 MB. Free memory was 181.8 MB in the beginning and 180.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:36,938 INFO L168 Benchmark]: Boogie Preprocessor took 13.51 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 179.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:36,938 INFO L168 Benchmark]: RCFGBuilder took 379.77 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 161.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:36,938 INFO L168 Benchmark]: TraceAbstraction took 12473.73 ms. Allocated memory was 202.4 MB in the beginning and 402.7 MB in the end (delta: 200.3 MB). Free memory was 160.7 MB in the beginning and 199.4 MB in the end (delta: -38.7 MB). Peak memory consumption was 163.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:36,938 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 0.13 ms. Allocated memory is still 202.4 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.54 ms. Allocated memory is still 202.4 MB. Free memory was 181.8 MB in the beginning and 180.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.51 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 179.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 379.77 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 161.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12473.73 ms. Allocated memory was 202.4 MB in the beginning and 402.7 MB in the end (delta: 200.3 MB). Free memory was 160.7 MB in the beginning and 199.4 MB in the end (delta: -38.7 MB). Peak memory consumption was 163.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2283, positive: 2142, positive conditional: 2142, positive unconditional: 0, negative: 141, negative conditional: 141, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2153, positive: 2142, positive conditional: 0, positive unconditional: 2142, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 364, positive: 361, positive conditional: 0, positive unconditional: 361, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 364, positive: 358, positive conditional: 0, positive unconditional: 358, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 31, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2153, positive: 1781, positive conditional: 0, positive unconditional: 1781, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 364, unknown conditional: 0, unknown unconditional: 364] , Statistics on independence cache: Total cache size (in pairs): 364, Positive cache size: 361, Positive conditional cache size: 0, Positive unconditional cache size: 361, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 130 - 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 - PositiveResult [Line: 104]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 12394.8ms, OverallIterations: 13, TraceHistogramMax: 3, EmptinessCheckTime: 47.3ms, AutomataDifference: 2572.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 202.2ms, PartialOrderReductionTime: 189.6ms, HoareTripleCheckerStatistics: 518 SDtfs, 904 SDslu, 2029 SDs, 0 SdLazy, 1399 SolverSat, 185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 702.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 514 GetRequests, 373 SyntacticMatches, 4 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2775.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1799occurred in iteration=10, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 191.4ms AutomataMinimizationTime, 13 MinimizatonAttempts, 1929 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 82.8ms SsaConstructionTime, 340.6ms SatisfiabilityAnalysisTime, 6211.1ms InterpolantComputationTime, 942 NumberOfCodeBlocks, 942 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 921 ConstructedInterpolants, 0 QuantifiedInterpolants, 6212 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1024 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 121/326 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 20:20:36,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...