/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:11:58,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:11:58,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:11:58,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:11:58,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:11:58,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:11:58,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:11:58,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:11:58,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:11:58,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:11:58,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:11:58,702 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:11:58,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:11:58,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:11:58,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:11:58,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:11:58,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:11:58,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:11:58,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:11:58,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:11:58,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:11:58,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:11:58,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:11:58,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:11:58,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:11:58,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:11:58,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:11:58,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:11:58,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:11:58,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:11:58,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:11:58,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:11:58,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:11:58,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:11:58,707 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:11:58,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:11:58,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:11:59,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:11:59,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:11:59,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:11:59,037 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:11:59,038 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:11:59,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl [2021-08-21 12:11:59,039 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x9.wvr.bpl' [2021-08-21 12:11:59,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:11:59,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:11:59,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:11:59,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:11:59,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:11:59,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:11:59,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:11:59,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:11:59,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:11:59,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:11:59,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:11:59,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:11:59,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:11:59,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/1) ... [2021-08-21 12:11:59,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:11:59,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:59,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:11:59,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:11:59,240 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:11:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:11:59,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:11:59,240 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:11:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:11:59,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:11:59,241 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:11:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:11:59,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:11:59,242 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:11:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:11:59,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:11:59,243 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:11:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:11:59,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:11:59,245 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:11:59,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:11:59,427 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:11:59,429 INFO L202 PluginConnector]: Adding new model exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:11:59 BoogieIcfgContainer [2021-08-21 12:11:59,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:11:59,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:11:59,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:11:59,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:11:59,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:11:59" (1/2) ... [2021-08-21 12:11:59,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c0448f and model type exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:11:59, skipping insertion in model container [2021-08-21 12:11:59,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x9.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:11:59" (2/2) ... [2021-08-21 12:11:59,435 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x9.wvr.bpl [2021-08-21 12:11:59,439 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:11:59,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:11:59,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:11:59,440 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:11:59,514 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 12:11:59,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:11:59,584 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:11:59,584 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 12:11:59,596 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 57 transitions, 146 flow [2021-08-21 12:12:00,049 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12225 states, 12224 states have (on average 3.9794666230366493) internal successors, (48645), 12224 states have internal predecessors, (48645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 12225 states, 12224 states have (on average 3.9794666230366493) internal successors, (48645), 12224 states have internal predecessors, (48645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:12:00,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:00,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:00,156 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1817176082, now seen corresponding path program 1 times [2021-08-21 12:12:00,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:00,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515302238] [2021-08-21 12:12:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:00,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:00,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:00,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515302238] [2021-08-21 12:12:00,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515302238] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:00,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:00,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:12:00,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696399228] [2021-08-21 12:12:00,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:12:00,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:00,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:12:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:00,511 INFO L87 Difference]: Start difference. First operand has 12225 states, 12224 states have (on average 3.9794666230366493) internal successors, (48645), 12224 states have internal predecessors, (48645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:00,885 INFO L93 Difference]: Finished difference Result 12650 states and 50294 transitions. [2021-08-21 12:12:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:12:00,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:12:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:01,054 INFO L225 Difference]: With dead ends: 12650 [2021-08-21 12:12:01,054 INFO L226 Difference]: Without dead ends: 12619 [2021-08-21 12:12:01,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12619 states. [2021-08-21 12:12:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12619 to 12354. [2021-08-21 12:12:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.977900105237594) internal successors, (49139), 12353 states have internal predecessors, (49139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 49139 transitions. [2021-08-21 12:12:02,004 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 49139 transitions. Word has length 19 [2021-08-21 12:12:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:02,006 INFO L470 AbstractCegarLoop]: Abstraction has 12354 states and 49139 transitions. [2021-08-21 12:12:02,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 49139 transitions. [2021-08-21 12:12:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:02,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:02,115 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] [2021-08-21 12:12:02,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:12:02,116 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1924913497, now seen corresponding path program 1 times [2021-08-21 12:12:02,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:02,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957526109] [2021-08-21 12:12:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:02,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:02,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:02,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957526109] [2021-08-21 12:12:02,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957526109] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:02,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:02,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:02,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730280828] [2021-08-21 12:12:02,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:02,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:02,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:02,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:02,209 INFO L87 Difference]: Start difference. First operand 12354 states and 49139 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:02,599 INFO L93 Difference]: Finished difference Result 19078 states and 74517 transitions. [2021-08-21 12:12:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:02,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:02,709 INFO L225 Difference]: With dead ends: 19078 [2021-08-21 12:12:02,709 INFO L226 Difference]: Without dead ends: 19078 [2021-08-21 12:12:02,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19078 states. [2021-08-21 12:12:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19078 to 13566. [2021-08-21 12:12:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13566 states, 13565 states have (on average 3.9962403243641726) internal successors, (54209), 13565 states have internal predecessors, (54209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13566 states to 13566 states and 54209 transitions. [2021-08-21 12:12:03,330 INFO L78 Accepts]: Start accepts. Automaton has 13566 states and 54209 transitions. Word has length 27 [2021-08-21 12:12:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:03,331 INFO L470 AbstractCegarLoop]: Abstraction has 13566 states and 54209 transitions. [2021-08-21 12:12:03,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 13566 states and 54209 transitions. [2021-08-21 12:12:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:03,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:03,651 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] [2021-08-21 12:12:03,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:12:03,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash -961019923, now seen corresponding path program 1 times [2021-08-21 12:12:03,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:03,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798270015] [2021-08-21 12:12:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:03,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:03,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:03,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798270015] [2021-08-21 12:12:03,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798270015] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:03,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:03,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:03,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927224535] [2021-08-21 12:12:03,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:03,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:03,805 INFO L87 Difference]: Start difference. First operand 13566 states and 54209 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:04,244 INFO L93 Difference]: Finished difference Result 19630 states and 77107 transitions. [2021-08-21 12:12:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:04,361 INFO L225 Difference]: With dead ends: 19630 [2021-08-21 12:12:04,366 INFO L226 Difference]: Without dead ends: 19630 [2021-08-21 12:12:04,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19630 states. [2021-08-21 12:12:04,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19630 to 15003. [2021-08-21 12:12:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15003 states, 15002 states have (on average 4.021930409278763) internal successors, (60337), 15002 states have internal predecessors, (60337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15003 states to 15003 states and 60337 transitions. [2021-08-21 12:12:05,080 INFO L78 Accepts]: Start accepts. Automaton has 15003 states and 60337 transitions. Word has length 27 [2021-08-21 12:12:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:05,080 INFO L470 AbstractCegarLoop]: Abstraction has 15003 states and 60337 transitions. [2021-08-21 12:12:05,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 15003 states and 60337 transitions. [2021-08-21 12:12:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:05,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:05,127 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] [2021-08-21 12:12:05,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:12:05,127 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1657381619, now seen corresponding path program 1 times [2021-08-21 12:12:05,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:05,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518479254] [2021-08-21 12:12:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:05,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:05,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:05,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518479254] [2021-08-21 12:12:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518479254] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:05,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:05,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:05,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76073929] [2021-08-21 12:12:05,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:05,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:05,156 INFO L87 Difference]: Start difference. First operand 15003 states and 60337 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:05,471 INFO L93 Difference]: Finished difference Result 17397 states and 69147 transitions. [2021-08-21 12:12:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:05,564 INFO L225 Difference]: With dead ends: 17397 [2021-08-21 12:12:05,564 INFO L226 Difference]: Without dead ends: 17389 [2021-08-21 12:12:05,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17389 states. [2021-08-21 12:12:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17389 to 15239. [2021-08-21 12:12:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15239 states, 15238 states have (on average 4.012009450059063) internal successors, (61135), 15238 states have internal predecessors, (61135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15239 states to 15239 states and 61135 transitions. [2021-08-21 12:12:06,304 INFO L78 Accepts]: Start accepts. Automaton has 15239 states and 61135 transitions. Word has length 27 [2021-08-21 12:12:06,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:06,304 INFO L470 AbstractCegarLoop]: Abstraction has 15239 states and 61135 transitions. [2021-08-21 12:12:06,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 15239 states and 61135 transitions. [2021-08-21 12:12:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:06,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:06,346 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] [2021-08-21 12:12:06,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:12:06,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 531191895, now seen corresponding path program 1 times [2021-08-21 12:12:06,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:06,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160017529] [2021-08-21 12:12:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:06,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:06,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:06,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160017529] [2021-08-21 12:12:06,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160017529] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:06,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:06,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:06,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709400510] [2021-08-21 12:12:06,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:06,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:06,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:06,392 INFO L87 Difference]: Start difference. First operand 15239 states and 61135 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:06,587 INFO L93 Difference]: Finished difference Result 17433 states and 69120 transitions. [2021-08-21 12:12:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:06,662 INFO L225 Difference]: With dead ends: 17433 [2021-08-21 12:12:06,662 INFO L226 Difference]: Without dead ends: 17415 [2021-08-21 12:12:06,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17415 states. [2021-08-21 12:12:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17415 to 15481. [2021-08-21 12:12:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15481 states, 15480 states have (on average 4.002260981912145) internal successors, (61955), 15480 states have internal predecessors, (61955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15481 states to 15481 states and 61955 transitions. [2021-08-21 12:12:07,319 INFO L78 Accepts]: Start accepts. Automaton has 15481 states and 61955 transitions. Word has length 27 [2021-08-21 12:12:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 15481 states and 61955 transitions. [2021-08-21 12:12:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 15481 states and 61955 transitions. [2021-08-21 12:12:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:07,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:07,352 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] [2021-08-21 12:12:07,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:12:07,353 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash -253055853, now seen corresponding path program 2 times [2021-08-21 12:12:07,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:07,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415535788] [2021-08-21 12:12:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:07,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:07,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:07,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415535788] [2021-08-21 12:12:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415535788] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:07,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:07,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:07,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109728970] [2021-08-21 12:12:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:07,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:07,381 INFO L87 Difference]: Start difference. First operand 15481 states and 61955 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:07,740 INFO L93 Difference]: Finished difference Result 18408 states and 73042 transitions. [2021-08-21 12:12:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:07,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:07,797 INFO L225 Difference]: With dead ends: 18408 [2021-08-21 12:12:07,797 INFO L226 Difference]: Without dead ends: 18408 [2021-08-21 12:12:07,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18408 states. [2021-08-21 12:12:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18408 to 16911. [2021-08-21 12:12:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16911 states, 16910 states have (on average 3.9978710821998815) internal successors, (67604), 16910 states have internal predecessors, (67604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16911 states to 16911 states and 67604 transitions. [2021-08-21 12:12:08,374 INFO L78 Accepts]: Start accepts. Automaton has 16911 states and 67604 transitions. Word has length 27 [2021-08-21 12:12:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:08,374 INFO L470 AbstractCegarLoop]: Abstraction has 16911 states and 67604 transitions. [2021-08-21 12:12:08,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 16911 states and 67604 transitions. [2021-08-21 12:12:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:08,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:08,410 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] [2021-08-21 12:12:08,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:12:08,410 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1382652649, now seen corresponding path program 2 times [2021-08-21 12:12:08,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:08,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806053991] [2021-08-21 12:12:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:08,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:08,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:08,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806053991] [2021-08-21 12:12:08,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806053991] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:08,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:08,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:08,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451221458] [2021-08-21 12:12:08,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:08,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:08,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:08,444 INFO L87 Difference]: Start difference. First operand 16911 states and 67604 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:08,632 INFO L93 Difference]: Finished difference Result 18407 states and 72770 transitions. [2021-08-21 12:12:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:08,703 INFO L225 Difference]: With dead ends: 18407 [2021-08-21 12:12:08,703 INFO L226 Difference]: Without dead ends: 18376 [2021-08-21 12:12:08,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18376 states. [2021-08-21 12:12:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18376 to 17154. [2021-08-21 12:12:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17154 states, 17153 states have (on average 3.9884568297090888) internal successors, (68414), 17153 states have internal predecessors, (68414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17154 states to 17154 states and 68414 transitions. [2021-08-21 12:12:09,281 INFO L78 Accepts]: Start accepts. Automaton has 17154 states and 68414 transitions. Word has length 27 [2021-08-21 12:12:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:09,281 INFO L470 AbstractCegarLoop]: Abstraction has 17154 states and 68414 transitions. [2021-08-21 12:12:09,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 17154 states and 68414 transitions. [2021-08-21 12:12:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:09,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:09,523 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] [2021-08-21 12:12:09,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:12:09,537 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1664214835, now seen corresponding path program 2 times [2021-08-21 12:12:09,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:09,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021084940] [2021-08-21 12:12:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:09,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:09,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:09,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021084940] [2021-08-21 12:12:09,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021084940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:09,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:09,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:09,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907074198] [2021-08-21 12:12:09,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:09,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:09,589 INFO L87 Difference]: Start difference. First operand 17154 states and 68414 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:09,777 INFO L93 Difference]: Finished difference Result 20764 states and 82157 transitions. [2021-08-21 12:12:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:09,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:09,852 INFO L225 Difference]: With dead ends: 20764 [2021-08-21 12:12:09,852 INFO L226 Difference]: Without dead ends: 20764 [2021-08-21 12:12:09,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20764 states. [2021-08-21 12:12:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20764 to 18641. [2021-08-21 12:12:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18641 states, 18640 states have (on average 3.990450643776824) internal successors, (74382), 18640 states have internal predecessors, (74382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18641 states to 18641 states and 74382 transitions. [2021-08-21 12:12:10,420 INFO L78 Accepts]: Start accepts. Automaton has 18641 states and 74382 transitions. Word has length 27 [2021-08-21 12:12:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:10,420 INFO L470 AbstractCegarLoop]: Abstraction has 18641 states and 74382 transitions. [2021-08-21 12:12:10,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18641 states and 74382 transitions. [2021-08-21 12:12:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:10,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:10,461 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] [2021-08-21 12:12:10,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:12:10,462 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:10,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:10,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2133714845, now seen corresponding path program 2 times [2021-08-21 12:12:10,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:10,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889362477] [2021-08-21 12:12:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:10,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:10,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:10,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889362477] [2021-08-21 12:12:10,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889362477] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:10,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:10,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:12:10,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8503812] [2021-08-21 12:12:10,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:12:10,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:12:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:12:10,486 INFO L87 Difference]: Start difference. First operand 18641 states and 74382 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:10,831 INFO L93 Difference]: Finished difference Result 20639 states and 81242 transitions. [2021-08-21 12:12:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-08-21 12:12:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:10,937 INFO L225 Difference]: With dead ends: 20639 [2021-08-21 12:12:10,937 INFO L226 Difference]: Without dead ends: 20611 [2021-08-21 12:12:10,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:10,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-08-21 12:12:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19021. [2021-08-21 12:12:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19021 states, 19020 states have (on average 3.982492113564669) internal successors, (75747), 19020 states have internal predecessors, (75747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19021 states to 19021 states and 75747 transitions. [2021-08-21 12:12:11,712 INFO L78 Accepts]: Start accepts. Automaton has 19021 states and 75747 transitions. Word has length 27 [2021-08-21 12:12:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:11,712 INFO L470 AbstractCegarLoop]: Abstraction has 19021 states and 75747 transitions. [2021-08-21 12:12:11,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-08-21 12:12:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 19021 states and 75747 transitions. [2021-08-21 12:12:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:12:11,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:11,763 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] [2021-08-21 12:12:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 12:12:11,764 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 12:12:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash 784676502, now seen corresponding path program 1 times [2021-08-21 12:12:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:11,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899828] [2021-08-21 12:12:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:11,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:12,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:12,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899828] [2021-08-21 12:12:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:12,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011717512] [2021-08-21 12:12:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:12,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:12,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:12,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:12:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:12:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:13,924 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2021-08-21 12:12:13,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:14,146 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,SelfDestructingSolverStorable9 [2021-08-21 12:12:14,147 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_div_x1_24_35_155 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:588) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:576) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:489) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:215) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:588) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:576) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:489) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:412) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:202) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:186) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:131) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:128) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:438) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-21 12:12:14,151 INFO L168 Benchmark]: Toolchain (without parser) took 15044.51 ms. Allocated memory was 186.6 MB in the beginning and 6.8 GB in the end (delta: 6.6 GB). Free memory was 167.9 MB in the beginning and 5.7 GB in the end (delta: -5.6 GB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-21 12:12:14,151 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:12:14,152 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 186.6 MB. Free memory was 167.8 MB in the beginning and 166.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:12:14,152 INFO L168 Benchmark]: Boogie Preprocessor took 29.93 ms. Allocated memory is still 186.6 MB. Free memory was 166.2 MB in the beginning and 165.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:12:14,152 INFO L168 Benchmark]: RCFGBuilder took 263.39 ms. Allocated memory is still 186.6 MB. Free memory was 165.2 MB in the beginning and 150.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:12:14,153 INFO L168 Benchmark]: TraceAbstraction took 14719.01 ms. Allocated memory was 186.6 MB in the beginning and 6.8 GB in the end (delta: 6.6 GB). Free memory was 150.4 MB in the beginning and 5.7 GB in the end (delta: -5.6 GB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-21 12:12:14,154 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 186.6 MB. Free memory was 167.8 MB in the beginning and 166.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.93 ms. Allocated memory is still 186.6 MB. Free memory was 166.2 MB in the beginning and 165.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 263.39 ms. Allocated memory is still 186.6 MB. Free memory was 165.2 MB in the beginning and 150.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14719.01 ms. Allocated memory was 186.6 MB in the beginning and 6.8 GB in the end (delta: 6.6 GB). Free memory was 150.4 MB in the beginning and 5.7 GB in the end (delta: -5.6 GB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_div_x1_24_35_155 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_div_x1_24_35_155 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-21 12:12:14,166 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...