/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/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 11:59:18,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:59:18,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:59:18,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 11:59:18,729 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 11:59:18,752 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:59:18,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:59:18,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:59:18,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:59:18,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:59:18,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:59:18,754 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:59:18,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:59:18,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:59:18,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:59:18,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:59:18,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:59:18,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:59:18,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:59:18,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:59:18,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:59:18,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:59:18,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:59:18,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:59:18,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:59:18,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:59:18,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:59:18,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:59:18,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:59:18,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:59:18,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:59:18,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:59:18,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:59:18,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:59:18,757 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:59:18,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:59:18,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:59:19,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:59:19,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:59:19,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:59:19,066 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 11:59:19,067 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 11:59:19,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-08-21 11:59:19,079 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-08-21 11:59:19,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:59:19,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 11:59:19,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:59:19,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:59:19,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:59:19,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:59:19,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:59:19,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:59:19,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:59:19,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:59:19,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:59:19,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:59:19,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:59:19,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/1) ... [2021-08-21 11:59:19,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:59:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:19,175 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 11:59:19,193 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 11:59:19,204 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 11:59:19,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 11:59:19,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 11:59:19,204 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 11:59:19,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 11:59:19,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 11:59:19,205 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 11:59:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:59:19,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:59:19,205 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 11:59:19,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:59:19,321 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 11:59:19,322 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:59:19 BoogieIcfgContainer [2021-08-21 11:59:19,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:59:19,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:59:19,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:59:19,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:59:19,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:59:19" (1/2) ... [2021-08-21 11:59:19,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2890615e and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:59:19, skipping insertion in model container [2021-08-21 11:59:19,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:59:19" (2/2) ... [2021-08-21 11:59:19,327 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-08-21 11:59:19,329 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:59:19,330 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:59:19,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:59:19,330 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:59:19,352 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 11:59:19,376 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:59:19,380 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 11:59:19,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 11:59:19,386 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 72 flow [2021-08-21 11:59:19,400 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 11:59:19,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:19,407 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:19,407 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:19,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1314794411, now seen corresponding path program 1 times [2021-08-21 11:59:19,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:19,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761936409] [2021-08-21 11:59:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:19,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:19,496 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 11:59:19,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:19,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761936409] [2021-08-21 11:59:19,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761936409] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:19,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:19,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:59:19,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388024498] [2021-08-21 11:59:19,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:59:19,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:59:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:19,511 INFO L87 Difference]: Start difference. First operand has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:19,533 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-08-21 11:59:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:59:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 11:59:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:19,540 INFO L225 Difference]: With dead ends: 131 [2021-08-21 11:59:19,541 INFO L226 Difference]: Without dead ends: 131 [2021-08-21 11:59:19,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-21 11:59:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-08-21 11:59:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-08-21 11:59:19,575 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 16 [2021-08-21 11:59:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:19,575 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-08-21 11:59:19,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-08-21 11:59:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:59:19,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:19,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:19,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:59:19,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:19,578 INFO L82 PathProgramCache]: Analyzing trace with hash 220858141, now seen corresponding path program 1 times [2021-08-21 11:59:19,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:19,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120130118] [2021-08-21 11:59:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:19,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:19,601 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 11:59:19,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:19,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120130118] [2021-08-21 11:59:19,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120130118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:19,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:19,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:59:19,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110983531] [2021-08-21 11:59:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:59:19,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:59:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:19,604 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:19,615 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-08-21 11:59:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:59:19,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 11:59:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:19,617 INFO L225 Difference]: With dead ends: 136 [2021-08-21 11:59:19,617 INFO L226 Difference]: Without dead ends: 136 [2021-08-21 11:59:19,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-21 11:59:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-08-21 11:59:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-08-21 11:59:19,629 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 17 [2021-08-21 11:59:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:19,629 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-08-21 11:59:19,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-08-21 11:59:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:19,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:19,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:19,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 11:59:19,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1024512200, now seen corresponding path program 1 times [2021-08-21 11:59:19,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:19,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068756607] [2021-08-21 11:59:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:19,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:19,739 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 11:59:19,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:19,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068756607] [2021-08-21 11:59:19,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068756607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:19,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:19,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:59:19,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516483686] [2021-08-21 11:59:19,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:59:19,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:59:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:59:19,741 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:19,826 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-08-21 11:59:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:19,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:19,828 INFO L225 Difference]: With dead ends: 171 [2021-08-21 11:59:19,828 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 11:59:19,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 11:59:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-08-21 11:59:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-08-21 11:59:19,838 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 18 [2021-08-21 11:59:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:19,838 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-08-21 11:59:19,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-08-21 11:59:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:19,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:19,839 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:19,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 11:59:19,839 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1634430967, now seen corresponding path program 1 times [2021-08-21 11:59:19,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:19,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138277701] [2021-08-21 11:59:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:19,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:19,933 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 11:59:19,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:19,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138277701] [2021-08-21 11:59:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138277701] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:19,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:19,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:19,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522532199] [2021-08-21 11:59:19,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:19,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:19,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:19,936 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:20,065 INFO L93 Difference]: Finished difference Result 189 states and 374 transitions. [2021-08-21 11:59:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:20,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:20,066 INFO L225 Difference]: With dead ends: 189 [2021-08-21 11:59:20,067 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 11:59:20,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 11:59:20,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2021-08-21 11:59:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1607142857142856) internal successors, (242), 112 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 242 transitions. [2021-08-21 11:59:20,072 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 242 transitions. Word has length 18 [2021-08-21 11:59:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:20,073 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 242 transitions. [2021-08-21 11:59:20,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 242 transitions. [2021-08-21 11:59:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:20,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:20,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:20,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 11:59:20,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:20,074 INFO L82 PathProgramCache]: Analyzing trace with hash 123697999, now seen corresponding path program 2 times [2021-08-21 11:59:20,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:20,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306449449] [2021-08-21 11:59:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:20,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:20,167 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 11:59:20,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:20,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306449449] [2021-08-21 11:59:20,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306449449] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:20,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:20,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:20,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321029152] [2021-08-21 11:59:20,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:20,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:20,169 INFO L87 Difference]: Start difference. First operand 113 states and 242 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:20,278 INFO L93 Difference]: Finished difference Result 217 states and 436 transitions. [2021-08-21 11:59:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:20,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:20,279 INFO L225 Difference]: With dead ends: 217 [2021-08-21 11:59:20,279 INFO L226 Difference]: Without dead ends: 189 [2021-08-21 11:59:20,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-21 11:59:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2021-08-21 11:59:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-08-21 11:59:20,285 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-08-21 11:59:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:20,285 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-08-21 11:59:20,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-08-21 11:59:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:20,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:20,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:20,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 11:59:20,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1040616896, now seen corresponding path program 2 times [2021-08-21 11:59:20,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:20,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903390208] [2021-08-21 11:59:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:20,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:20,352 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 11:59:20,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:20,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903390208] [2021-08-21 11:59:20,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903390208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:20,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:20,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:59:20,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911341188] [2021-08-21 11:59:20,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:59:20,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:59:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:59:20,354 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:20,428 INFO L93 Difference]: Finished difference Result 208 states and 418 transitions. [2021-08-21 11:59:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:20,429 INFO L225 Difference]: With dead ends: 208 [2021-08-21 11:59:20,429 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 11:59:20,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 11:59:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-08-21 11:59:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-08-21 11:59:20,434 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-08-21 11:59:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:20,434 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-08-21 11:59:20,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-08-21 11:59:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:20,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:20,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:20,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 11:59:20,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash -147252898, now seen corresponding path program 3 times [2021-08-21 11:59:20,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:20,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220071194] [2021-08-21 11:59:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:20,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:20,499 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 11:59:20,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:20,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220071194] [2021-08-21 11:59:20,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220071194] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:20,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:20,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:59:20,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719464073] [2021-08-21 11:59:20,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:59:20,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:59:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:59:20,500 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:20,572 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-08-21 11:59:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:20,574 INFO L225 Difference]: With dead ends: 200 [2021-08-21 11:59:20,574 INFO L226 Difference]: Without dead ends: 186 [2021-08-21 11:59:20,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-21 11:59:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 123. [2021-08-21 11:59:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-08-21 11:59:20,578 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 18 [2021-08-21 11:59:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:20,578 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-08-21 11:59:20,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-08-21 11:59:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:20,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:20,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:20,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 11:59:20,579 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:20,579 INFO L82 PathProgramCache]: Analyzing trace with hash -546568927, now seen corresponding path program 3 times [2021-08-21 11:59:20,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:20,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636907431] [2021-08-21 11:59:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:20,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:20,683 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 11:59:20,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:20,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636907431] [2021-08-21 11:59:20,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636907431] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:20,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:20,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:20,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472708164] [2021-08-21 11:59:20,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:20,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:20,686 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:20,796 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-08-21 11:59:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:20,797 INFO L225 Difference]: With dead ends: 217 [2021-08-21 11:59:20,797 INFO L226 Difference]: Without dead ends: 208 [2021-08-21 11:59:20,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-21 11:59:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 125. [2021-08-21 11:59:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.193548387096774) internal successors, (272), 124 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 272 transitions. [2021-08-21 11:59:20,801 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 272 transitions. Word has length 18 [2021-08-21 11:59:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:20,801 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 272 transitions. [2021-08-21 11:59:20,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 272 transitions. [2021-08-21 11:59:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:20,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:20,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:20,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 11:59:20,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:20,803 INFO L82 PathProgramCache]: Analyzing trace with hash 346795071, now seen corresponding path program 4 times [2021-08-21 11:59:20,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:20,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54285532] [2021-08-21 11:59:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:20,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:20,863 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 11:59:20,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:20,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54285532] [2021-08-21 11:59:20,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54285532] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:20,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:20,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:20,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061316400] [2021-08-21 11:59:20,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:20,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:20,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:20,865 INFO L87 Difference]: Start difference. First operand 125 states and 272 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:20,969 INFO L93 Difference]: Finished difference Result 210 states and 422 transitions. [2021-08-21 11:59:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:20,970 INFO L225 Difference]: With dead ends: 210 [2021-08-21 11:59:20,970 INFO L226 Difference]: Without dead ends: 191 [2021-08-21 11:59:20,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-21 11:59:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-08-21 11:59:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 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) [2021-08-21 11:59:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 238 transitions. [2021-08-21 11:59:20,973 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 238 transitions. Word has length 18 [2021-08-21 11:59:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:20,973 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 238 transitions. [2021-08-21 11:59:20,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 238 transitions. [2021-08-21 11:59:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:20,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:20,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:20,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 11:59:20,974 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash -62451761, now seen corresponding path program 5 times [2021-08-21 11:59:20,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:20,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281918960] [2021-08-21 11:59:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:20,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,028 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 11:59:21,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281918960] [2021-08-21 11:59:21,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281918960] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:21,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618211133] [2021-08-21 11:59:21,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:21,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:21,030 INFO L87 Difference]: Start difference. First operand 110 states and 238 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,100 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-08-21 11:59:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,101 INFO L225 Difference]: With dead ends: 164 [2021-08-21 11:59:21,101 INFO L226 Difference]: Without dead ends: 136 [2021-08-21 11:59:21,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-21 11:59:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2021-08-21 11:59:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-08-21 11:59:21,104 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-08-21 11:59:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,105 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-08-21 11:59:21,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-08-21 11:59:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,105 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 11:59:21,105 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash -732718687, now seen corresponding path program 6 times [2021-08-21 11:59:21,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530608606] [2021-08-21 11:59:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,157 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 11:59:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530608606] [2021-08-21 11:59:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530608606] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:21,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828901834] [2021-08-21 11:59:21,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:21,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:21,158 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,243 INFO L93 Difference]: Finished difference Result 169 states and 326 transitions. [2021-08-21 11:59:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,245 INFO L225 Difference]: With dead ends: 169 [2021-08-21 11:59:21,245 INFO L226 Difference]: Without dead ends: 160 [2021-08-21 11:59:21,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-21 11:59:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-08-21 11:59:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-08-21 11:59:21,248 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 18 [2021-08-21 11:59:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,248 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-08-21 11:59:21,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-08-21 11:59:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 11:59:21,249 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash 160645311, now seen corresponding path program 7 times [2021-08-21 11:59:21,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533009423] [2021-08-21 11:59:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,300 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 11:59:21,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533009423] [2021-08-21 11:59:21,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533009423] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:21,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714970319] [2021-08-21 11:59:21,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:21,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:21,306 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,376 INFO L93 Difference]: Finished difference Result 156 states and 307 transitions. [2021-08-21 11:59:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:21,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,377 INFO L225 Difference]: With dead ends: 156 [2021-08-21 11:59:21,377 INFO L226 Difference]: Without dead ends: 139 [2021-08-21 11:59:21,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-21 11:59:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-08-21 11:59:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-08-21 11:59:21,380 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 18 [2021-08-21 11:59:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,380 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-08-21 11:59:21,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-08-21 11:59:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 11:59:21,381 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1835169788, now seen corresponding path program 4 times [2021-08-21 11:59:21,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575820529] [2021-08-21 11:59:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,421 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 11:59:21,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575820529] [2021-08-21 11:59:21,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575820529] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:59:21,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248430759] [2021-08-21 11:59:21,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:59:21,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:59:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:59:21,423 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,465 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-08-21 11:59:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,467 INFO L225 Difference]: With dead ends: 156 [2021-08-21 11:59:21,467 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 11:59:21,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 11:59:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-08-21 11:59:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-08-21 11:59:21,469 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 18 [2021-08-21 11:59:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,470 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-08-21 11:59:21,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-08-21 11:59:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 11:59:21,471 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1156501154, now seen corresponding path program 5 times [2021-08-21 11:59:21,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108037013] [2021-08-21 11:59:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,510 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 11:59:21,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108037013] [2021-08-21 11:59:21,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108037013] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:59:21,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398859303] [2021-08-21 11:59:21,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:59:21,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:59:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:59:21,511 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,559 INFO L93 Difference]: Finished difference Result 175 states and 330 transitions. [2021-08-21 11:59:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,560 INFO L225 Difference]: With dead ends: 175 [2021-08-21 11:59:21,560 INFO L226 Difference]: Without dead ends: 166 [2021-08-21 11:59:21,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-21 11:59:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2021-08-21 11:59:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-08-21 11:59:21,563 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-08-21 11:59:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,564 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-08-21 11:59:21,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-08-21 11:59:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 11:59:21,565 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash 774327010, now seen corresponding path program 6 times [2021-08-21 11:59:21,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789910546] [2021-08-21 11:59:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,604 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 11:59:21,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789910546] [2021-08-21 11:59:21,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789910546] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:59:21,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040545300] [2021-08-21 11:59:21,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:59:21,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:59:21,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:59:21,605 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,651 INFO L93 Difference]: Finished difference Result 160 states and 308 transitions. [2021-08-21 11:59:21,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:59:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,652 INFO L225 Difference]: With dead ends: 160 [2021-08-21 11:59:21,652 INFO L226 Difference]: Without dead ends: 145 [2021-08-21 11:59:21,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-21 11:59:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2021-08-21 11:59:21,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-08-21 11:59:21,655 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-08-21 11:59:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,655 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-08-21 11:59:21,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-08-21 11:59:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,656 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 11:59:21,656 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,656 INFO L82 PathProgramCache]: Analyzing trace with hash 498525861, now seen corresponding path program 8 times [2021-08-21 11:59:21,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541555514] [2021-08-21 11:59:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,704 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 11:59:21,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541555514] [2021-08-21 11:59:21,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541555514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:21,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823893648] [2021-08-21 11:59:21,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:21,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:21,706 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,779 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-08-21 11:59:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,780 INFO L225 Difference]: With dead ends: 129 [2021-08-21 11:59:21,780 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 11:59:21,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 11:59:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-08-21 11:59:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 98 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-08-21 11:59:21,782 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-08-21 11:59:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,783 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-08-21 11:59:21,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-08-21 11:59:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,783 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 11:59:21,783 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -804770493, now seen corresponding path program 9 times [2021-08-21 11:59:21,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213633173] [2021-08-21 11:59:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,831 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 11:59:21,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213633173] [2021-08-21 11:59:21,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213633173] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:21,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771092799] [2021-08-21 11:59:21,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:21,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:21,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:21,832 INFO L87 Difference]: Start difference. First operand 99 states and 206 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,903 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2021-08-21 11:59:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,904 INFO L225 Difference]: With dead ends: 144 [2021-08-21 11:59:21,904 INFO L226 Difference]: Without dead ends: 135 [2021-08-21 11:59:21,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-21 11:59:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-08-21 11:59:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-08-21 11:59:21,906 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-08-21 11:59:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,906 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-08-21 11:59:21,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-08-21 11:59:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:21,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,907 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 11:59:21,907 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:21,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:21,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1186944637, now seen corresponding path program 10 times [2021-08-21 11:59:21,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:21,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308992590] [2021-08-21 11:59:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:21,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:21,953 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 11:59:21,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:21,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308992590] [2021-08-21 11:59:21,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308992590] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:21,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:21,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:21,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189907458] [2021-08-21 11:59:21,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:21,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:21,954 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,018 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-08-21 11:59:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,019 INFO L225 Difference]: With dead ends: 127 [2021-08-21 11:59:22,019 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 11:59:22,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 11:59:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-08-21 11:59:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-08-21 11:59:22,022 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-08-21 11:59:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,022 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-08-21 11:59:22,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-08-21 11:59:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:22,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 11:59:22,023 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash 579579833, now seen corresponding path program 1 times [2021-08-21 11:59:22,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549901402] [2021-08-21 11:59:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,069 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 11:59:22,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549901402] [2021-08-21 11:59:22,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549901402] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:22,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:22,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:22,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12334889] [2021-08-21 11:59:22,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:22,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:22,071 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,132 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-08-21 11:59:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:22,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,133 INFO L225 Difference]: With dead ends: 129 [2021-08-21 11:59:22,133 INFO L226 Difference]: Without dead ends: 119 [2021-08-21 11:59:22,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-21 11:59:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-08-21 11:59:22,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-08-21 11:59:22,135 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-08-21 11:59:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,136 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-08-21 11:59:22,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-08-21 11:59:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:22,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 11:59:22,136 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1056444296, now seen corresponding path program 1 times [2021-08-21 11:59:22,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441390596] [2021-08-21 11:59:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,193 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 11:59:22,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441390596] [2021-08-21 11:59:22,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441390596] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:22,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:22,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:22,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874421378] [2021-08-21 11:59:22,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:22,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:22,194 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,313 INFO L93 Difference]: Finished difference Result 147 states and 289 transitions. [2021-08-21 11:59:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,313 INFO L225 Difference]: With dead ends: 147 [2021-08-21 11:59:22,314 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 11:59:22,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 11:59:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-08-21 11:59:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 181 transitions. [2021-08-21 11:59:22,316 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 181 transitions. Word has length 18 [2021-08-21 11:59:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,316 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 181 transitions. [2021-08-21 11:59:22,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 181 transitions. [2021-08-21 11:59:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:22,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 11:59:22,316 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1727790032, now seen corresponding path program 2 times [2021-08-21 11:59:22,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866885851] [2021-08-21 11:59:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,372 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 11:59:22,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866885851] [2021-08-21 11:59:22,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866885851] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:22,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:22,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:22,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183812812] [2021-08-21 11:59:22,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:22,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:22,373 INFO L87 Difference]: Start difference. First operand 88 states and 181 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,469 INFO L93 Difference]: Finished difference Result 175 states and 343 transitions. [2021-08-21 11:59:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,470 INFO L225 Difference]: With dead ends: 175 [2021-08-21 11:59:22,470 INFO L226 Difference]: Without dead ends: 147 [2021-08-21 11:59:22,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-21 11:59:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-08-21 11:59:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-08-21 11:59:22,473 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 18 [2021-08-21 11:59:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,473 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-08-21 11:59:22,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-08-21 11:59:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:22,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 11:59:22,474 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,474 INFO L82 PathProgramCache]: Analyzing trace with hash 563475137, now seen corresponding path program 2 times [2021-08-21 11:59:22,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697750740] [2021-08-21 11:59:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,520 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 11:59:22,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697750740] [2021-08-21 11:59:22,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697750740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:22,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:22,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:22,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147172933] [2021-08-21 11:59:22,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:22,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:22,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:22,522 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,589 INFO L93 Difference]: Finished difference Result 172 states and 336 transitions. [2021-08-21 11:59:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,590 INFO L225 Difference]: With dead ends: 172 [2021-08-21 11:59:22,590 INFO L226 Difference]: Without dead ends: 159 [2021-08-21 11:59:22,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-21 11:59:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2021-08-21 11:59:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-08-21 11:59:22,593 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 18 [2021-08-21 11:59:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,593 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-08-21 11:59:22,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-08-21 11:59:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:22,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,593 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 11:59:22,594 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1456839135, now seen corresponding path program 3 times [2021-08-21 11:59:22,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57347327] [2021-08-21 11:59:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,638 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 11:59:22,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57347327] [2021-08-21 11:59:22,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57347327] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:22,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:22,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:22,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637598054] [2021-08-21 11:59:22,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:22,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:22,639 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,706 INFO L93 Difference]: Finished difference Result 160 states and 319 transitions. [2021-08-21 11:59:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,707 INFO L225 Difference]: With dead ends: 160 [2021-08-21 11:59:22,707 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 11:59:22,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:22,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 11:59:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-08-21 11:59:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.074766355140187) internal successors, (222), 107 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 222 transitions. [2021-08-21 11:59:22,709 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 222 transitions. Word has length 18 [2021-08-21 11:59:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,709 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 222 transitions. [2021-08-21 11:59:22,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,709 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 222 transitions. [2021-08-21 11:59:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:22,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-21 11:59:22,710 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1057523106, now seen corresponding path program 3 times [2021-08-21 11:59:22,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30273096] [2021-08-21 11:59:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,765 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 11:59:22,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30273096] [2021-08-21 11:59:22,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30273096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:22,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:22,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809037083] [2021-08-21 11:59:22,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:22,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:22,767 INFO L87 Difference]: Start difference. First operand 108 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:22,892 INFO L93 Difference]: Finished difference Result 166 states and 316 transitions. [2021-08-21 11:59:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:22,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:22,893 INFO L225 Difference]: With dead ends: 166 [2021-08-21 11:59:22,893 INFO L226 Difference]: Without dead ends: 153 [2021-08-21 11:59:22,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-21 11:59:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-08-21 11:59:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-08-21 11:59:22,896 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 18 [2021-08-21 11:59:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:22,896 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-08-21 11:59:22,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-08-21 11:59:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:22,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:22,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:22,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-21 11:59:22,897 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1950887104, now seen corresponding path program 4 times [2021-08-21 11:59:22,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946571621] [2021-08-21 11:59:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,956 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 11:59:22,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946571621] [2021-08-21 11:59:22,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946571621] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:22,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:22,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:22,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882893914] [2021-08-21 11:59:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:22,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:22,958 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,082 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2021-08-21 11:59:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:23,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,083 INFO L225 Difference]: With dead ends: 157 [2021-08-21 11:59:23,083 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 11:59:23,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 11:59:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-08-21 11:59:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-08-21 11:59:23,085 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 18 [2021-08-21 11:59:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,086 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-08-21 11:59:23,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-08-21 11:59:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:23,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,086 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-21 11:59:23,086 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash 460332854, now seen corresponding path program 5 times [2021-08-21 11:59:23,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867616683] [2021-08-21 11:59:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,142 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 11:59:23,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867616683] [2021-08-21 11:59:23,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867616683] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:23,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:23,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:23,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028718388] [2021-08-21 11:59:23,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:23,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:23,144 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,245 INFO L93 Difference]: Finished difference Result 189 states and 381 transitions. [2021-08-21 11:59:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,246 INFO L225 Difference]: With dead ends: 189 [2021-08-21 11:59:23,246 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 11:59:23,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 11:59:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-08-21 11:59:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-08-21 11:59:23,248 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-08-21 11:59:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,248 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-08-21 11:59:23,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-08-21 11:59:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:23,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-21 11:59:23,249 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash -209934072, now seen corresponding path program 6 times [2021-08-21 11:59:23,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150207884] [2021-08-21 11:59:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,303 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 11:59:23,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150207884] [2021-08-21 11:59:23,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150207884] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:23,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:23,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:23,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100972618] [2021-08-21 11:59:23,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:23,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:23,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:23,304 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,405 INFO L93 Difference]: Finished difference Result 195 states and 376 transitions. [2021-08-21 11:59:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,406 INFO L225 Difference]: With dead ends: 195 [2021-08-21 11:59:23,406 INFO L226 Difference]: Without dead ends: 182 [2021-08-21 11:59:23,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-21 11:59:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-08-21 11:59:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 278 transitions. [2021-08-21 11:59:23,409 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 278 transitions. Word has length 18 [2021-08-21 11:59:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,409 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 278 transitions. [2021-08-21 11:59:23,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 278 transitions. [2021-08-21 11:59:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:23,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,410 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-21 11:59:23,410 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash 683429926, now seen corresponding path program 7 times [2021-08-21 11:59:23,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642823879] [2021-08-21 11:59:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,464 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 11:59:23,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642823879] [2021-08-21 11:59:23,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642823879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:23,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:23,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:23,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997450194] [2021-08-21 11:59:23,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:23,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:23,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:23,465 INFO L87 Difference]: Start difference. First operand 131 states and 278 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,573 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-08-21 11:59:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:23,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,574 INFO L225 Difference]: With dead ends: 180 [2021-08-21 11:59:23,574 INFO L226 Difference]: Without dead ends: 149 [2021-08-21 11:59:23,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-21 11:59:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-08-21 11:59:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-08-21 11:59:23,577 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 18 [2021-08-21 11:59:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,577 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-08-21 11:59:23,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-08-21 11:59:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:23,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-21 11:59:23,578 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1370649209, now seen corresponding path program 4 times [2021-08-21 11:59:23,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474871360] [2021-08-21 11:59:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,623 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 11:59:23,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474871360] [2021-08-21 11:59:23,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474871360] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:23,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184582663] [2021-08-21 11:59:23,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:23,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:23,624 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,692 INFO L93 Difference]: Finished difference Result 182 states and 359 transitions. [2021-08-21 11:59:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:23,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,693 INFO L225 Difference]: With dead ends: 182 [2021-08-21 11:59:23,693 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 11:59:23,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 11:59:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-08-21 11:59:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-08-21 11:59:23,696 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 18 [2021-08-21 11:59:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,696 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-08-21 11:59:23,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-08-21 11:59:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:23,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-21 11:59:23,697 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1695120219, now seen corresponding path program 5 times [2021-08-21 11:59:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486111022] [2021-08-21 11:59:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,742 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 11:59:23,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486111022] [2021-08-21 11:59:23,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486111022] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:23,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:23,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:23,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739157913] [2021-08-21 11:59:23,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:23,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:23,744 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,812 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-08-21 11:59:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,813 INFO L225 Difference]: With dead ends: 182 [2021-08-21 11:59:23,813 INFO L226 Difference]: Without dead ends: 173 [2021-08-21 11:59:23,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-08-21 11:59:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-08-21 11:59:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-08-21 11:59:23,816 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 18 [2021-08-21 11:59:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,816 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-08-21 11:59:23,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-08-21 11:59:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:23,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-21 11:59:23,817 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1706483079, now seen corresponding path program 6 times [2021-08-21 11:59:23,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072883807] [2021-08-21 11:59:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,861 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 11:59:23,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072883807] [2021-08-21 11:59:23,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072883807] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:23,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:23,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:23,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490363634] [2021-08-21 11:59:23,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:23,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:23,862 INFO L87 Difference]: Start difference. First operand 126 states and 263 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,932 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-08-21 11:59:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,933 INFO L225 Difference]: With dead ends: 171 [2021-08-21 11:59:23,933 INFO L226 Difference]: Without dead ends: 148 [2021-08-21 11:59:23,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:23,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-21 11:59:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-08-21 11:59:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2021-08-21 11:59:23,935 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 18 [2021-08-21 11:59:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:23,936 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2021-08-21 11:59:23,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2021-08-21 11:59:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:23,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:23,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:23,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-21 11:59:23,936 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash -493732936, now seen corresponding path program 8 times [2021-08-21 11:59:23,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:23,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576962746] [2021-08-21 11:59:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:23,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:23,992 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 11:59:23,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:23,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576962746] [2021-08-21 11:59:23,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576962746] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:23,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:23,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:23,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358519984] [2021-08-21 11:59:23,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:23,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:23,993 INFO L87 Difference]: Start difference. First operand 102 states and 207 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:24,105 INFO L93 Difference]: Finished difference Result 166 states and 313 transitions. [2021-08-21 11:59:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:24,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:24,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:24,106 INFO L225 Difference]: With dead ends: 166 [2021-08-21 11:59:24,106 INFO L226 Difference]: Without dead ends: 145 [2021-08-21 11:59:24,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-21 11:59:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-08-21 11:59:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-08-21 11:59:24,109 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 18 [2021-08-21 11:59:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,109 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-08-21 11:59:24,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-08-21 11:59:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:24,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,109 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-21 11:59:24,120 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash -169261926, now seen corresponding path program 9 times [2021-08-21 11:59:24,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:24,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619645827] [2021-08-21 11:59:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:24,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:24,175 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 11:59:24,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:24,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619645827] [2021-08-21 11:59:24,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619645827] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:24,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:24,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:24,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127997066] [2021-08-21 11:59:24,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:24,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:24,176 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:24,304 INFO L93 Difference]: Finished difference Result 166 states and 310 transitions. [2021-08-21 11:59:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:24,305 INFO L225 Difference]: With dead ends: 166 [2021-08-21 11:59:24,305 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 11:59:24,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 11:59:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-08-21 11:59:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 213 transitions. [2021-08-21 11:59:24,307 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 213 transitions. Word has length 18 [2021-08-21 11:59:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,307 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 213 transitions. [2021-08-21 11:59:24,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 213 transitions. [2021-08-21 11:59:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:24,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,308 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-21 11:59:24,308 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:24,308 INFO L82 PathProgramCache]: Analyzing trace with hash 724102072, now seen corresponding path program 10 times [2021-08-21 11:59:24,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:24,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596439972] [2021-08-21 11:59:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:24,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:24,364 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 11:59:24,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:24,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596439972] [2021-08-21 11:59:24,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596439972] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:24,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:24,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:24,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839497339] [2021-08-21 11:59:24,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:24,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:24,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:24,365 INFO L87 Difference]: Start difference. First operand 107 states and 213 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:24,506 INFO L93 Difference]: Finished difference Result 155 states and 296 transitions. [2021-08-21 11:59:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:24,507 INFO L225 Difference]: With dead ends: 155 [2021-08-21 11:59:24,507 INFO L226 Difference]: Without dead ends: 106 [2021-08-21 11:59:24,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-21 11:59:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-08-21 11:59:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-08-21 11:59:24,509 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 18 [2021-08-21 11:59:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,509 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-08-21 11:59:24,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-08-21 11:59:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:24,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-21 11:59:24,510 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 283747854, now seen corresponding path program 11 times [2021-08-21 11:59:24,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:24,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972759720] [2021-08-21 11:59:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:24,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:24,565 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 11:59:24,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:24,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972759720] [2021-08-21 11:59:24,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972759720] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:24,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:24,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:24,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793776043] [2021-08-21 11:59:24,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:24,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:24,567 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:24,660 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-08-21 11:59:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:24,660 INFO L225 Difference]: With dead ends: 110 [2021-08-21 11:59:24,661 INFO L226 Difference]: Without dead ends: 82 [2021-08-21 11:59:24,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-21 11:59:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-08-21 11:59:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-08-21 11:59:24,662 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 18 [2021-08-21 11:59:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,662 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-08-21 11:59:24,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-08-21 11:59:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:24,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,663 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-21 11:59:24,663 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -386519072, now seen corresponding path program 12 times [2021-08-21 11:59:24,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:24,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212143589] [2021-08-21 11:59:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:24,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:24,718 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 11:59:24,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:24,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212143589] [2021-08-21 11:59:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212143589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:24,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:24,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:24,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77461470] [2021-08-21 11:59:24,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:24,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:24,719 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:24,827 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2021-08-21 11:59:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:24,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:24,828 INFO L225 Difference]: With dead ends: 116 [2021-08-21 11:59:24,828 INFO L226 Difference]: Without dead ends: 103 [2021-08-21 11:59:24,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-21 11:59:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-08-21 11:59:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-08-21 11:59:24,830 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-08-21 11:59:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,830 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-08-21 11:59:24,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,830 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-08-21 11:59:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:24,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-21 11:59:24,831 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:24,831 INFO L82 PathProgramCache]: Analyzing trace with hash 506844926, now seen corresponding path program 13 times [2021-08-21 11:59:24,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:24,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762941926] [2021-08-21 11:59:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:24,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:24,885 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 11:59:24,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:24,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762941926] [2021-08-21 11:59:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762941926] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:24,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:24,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:24,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245636941] [2021-08-21 11:59:24,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:24,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:24,886 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:24,979 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-08-21 11:59:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:24,980 INFO L225 Difference]: With dead ends: 101 [2021-08-21 11:59:24,980 INFO L226 Difference]: Without dead ends: 70 [2021-08-21 11:59:24,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-21 11:59:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-08-21 11:59:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-08-21 11:59:24,982 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 18 [2021-08-21 11:59:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,982 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-08-21 11:59:24,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-08-21 11:59:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:24,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,982 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-21 11:59:24,982 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash -670317936, now seen corresponding path program 14 times [2021-08-21 11:59:24,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:24,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110684446] [2021-08-21 11:59:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:24,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,037 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 11:59:25,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110684446] [2021-08-21 11:59:25,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110684446] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:25,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913359793] [2021-08-21 11:59:25,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:25,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:25,039 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,138 INFO L93 Difference]: Finished difference Result 112 states and 193 transitions. [2021-08-21 11:59:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,138 INFO L225 Difference]: With dead ends: 112 [2021-08-21 11:59:25,139 INFO L226 Difference]: Without dead ends: 91 [2021-08-21 11:59:25,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-21 11:59:25,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-08-21 11:59:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 124 transitions. [2021-08-21 11:59:25,140 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 124 transitions. Word has length 18 [2021-08-21 11:59:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,140 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 124 transitions. [2021-08-21 11:59:25,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 124 transitions. [2021-08-21 11:59:25,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:25,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,141 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-21 11:59:25,141 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash -345846926, now seen corresponding path program 15 times [2021-08-21 11:59:25,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651729122] [2021-08-21 11:59:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,197 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 11:59:25,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651729122] [2021-08-21 11:59:25,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651729122] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:25,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576635940] [2021-08-21 11:59:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:25,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:25,199 INFO L87 Difference]: Start difference. First operand 68 states and 124 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,293 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2021-08-21 11:59:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:25,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,294 INFO L225 Difference]: With dead ends: 100 [2021-08-21 11:59:25,294 INFO L226 Difference]: Without dead ends: 91 [2021-08-21 11:59:25,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-21 11:59:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-08-21 11:59:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.838235294117647) internal successors, (125), 68 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 125 transitions. [2021-08-21 11:59:25,296 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 125 transitions. Word has length 18 [2021-08-21 11:59:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,296 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 125 transitions. [2021-08-21 11:59:25,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 125 transitions. [2021-08-21 11:59:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:25,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-21 11:59:25,296 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 547517072, now seen corresponding path program 16 times [2021-08-21 11:59:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79488517] [2021-08-21 11:59:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,351 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 11:59:25,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79488517] [2021-08-21 11:59:25,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79488517] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:25,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170600583] [2021-08-21 11:59:25,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:25,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:25,353 INFO L87 Difference]: Start difference. First operand 69 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,445 INFO L93 Difference]: Finished difference Result 89 states and 154 transitions. [2021-08-21 11:59:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,446 INFO L225 Difference]: With dead ends: 89 [2021-08-21 11:59:25,446 INFO L226 Difference]: Without dead ends: 48 [2021-08-21 11:59:25,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-21 11:59:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-08-21 11:59:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2021-08-21 11:59:25,447 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 18 [2021-08-21 11:59:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,447 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2021-08-21 11:59:25,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2021-08-21 11:59:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:25,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,448 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-21 11:59:25,448 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572155, now seen corresponding path program 7 times [2021-08-21 11:59:25,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841713922] [2021-08-21 11:59:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,510 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 11:59:25,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841713922] [2021-08-21 11:59:25,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841713922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:25,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83189024] [2021-08-21 11:59:25,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:25,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:25,511 INFO L87 Difference]: Start difference. First operand 46 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,590 INFO L93 Difference]: Finished difference Result 102 states and 161 transitions. [2021-08-21 11:59:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:25,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,591 INFO L225 Difference]: With dead ends: 102 [2021-08-21 11:59:25,591 INFO L226 Difference]: Without dead ends: 79 [2021-08-21 11:59:25,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-21 11:59:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2021-08-21 11:59:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 76 transitions. [2021-08-21 11:59:25,593 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 76 transitions. Word has length 18 [2021-08-21 11:59:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,593 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 76 transitions. [2021-08-21 11:59:25,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 76 transitions. [2021-08-21 11:59:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:25,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,593 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-21 11:59:25,594 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1859620965, now seen corresponding path program 8 times [2021-08-21 11:59:25,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456869207] [2021-08-21 11:59:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,643 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 11:59:25,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456869207] [2021-08-21 11:59:25,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456869207] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:25,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474263060] [2021-08-21 11:59:25,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:25,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:25,645 INFO L87 Difference]: Start difference. First operand 47 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,711 INFO L93 Difference]: Finished difference Result 88 states and 137 transitions. [2021-08-21 11:59:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,712 INFO L225 Difference]: With dead ends: 88 [2021-08-21 11:59:25,712 INFO L226 Difference]: Without dead ends: 67 [2021-08-21 11:59:25,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-21 11:59:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-08-21 11:59:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 81 transitions. [2021-08-21 11:59:25,714 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 81 transitions. Word has length 18 [2021-08-21 11:59:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,714 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 81 transitions. [2021-08-21 11:59:25,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 81 transitions. [2021-08-21 11:59:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:25,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,714 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-21 11:59:25,715 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1478454663, now seen corresponding path program 9 times [2021-08-21 11:59:25,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567457617] [2021-08-21 11:59:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,759 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 11:59:25,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567457617] [2021-08-21 11:59:25,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567457617] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:25,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570120382] [2021-08-21 11:59:25,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:25,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:25,761 INFO L87 Difference]: Start difference. First operand 51 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,821 INFO L93 Difference]: Finished difference Result 78 states and 116 transitions. [2021-08-21 11:59:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:25,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,822 INFO L225 Difference]: With dead ends: 78 [2021-08-21 11:59:25,822 INFO L226 Difference]: Without dead ends: 69 [2021-08-21 11:59:25,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-21 11:59:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-08-21 11:59:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 82 transitions. [2021-08-21 11:59:25,823 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 82 transitions. Word has length 18 [2021-08-21 11:59:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,823 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 82 transitions. [2021-08-21 11:59:25,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 82 transitions. [2021-08-21 11:59:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:25,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,824 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-21 11:59:25,824 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1923148635, now seen corresponding path program 10 times [2021-08-21 11:59:25,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937464664] [2021-08-21 11:59:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,869 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 11:59:25,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937464664] [2021-08-21 11:59:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937464664] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:59:25,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907635271] [2021-08-21 11:59:25,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:59:25,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:59:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:59:25,871 INFO L87 Difference]: Start difference. First operand 52 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:25,931 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2021-08-21 11:59:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:59:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:25,932 INFO L225 Difference]: With dead ends: 67 [2021-08-21 11:59:25,932 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 11:59:25,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 11:59:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-08-21 11:59:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 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) [2021-08-21 11:59:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2021-08-21 11:59:25,933 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 18 [2021-08-21 11:59:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:25,933 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2021-08-21 11:59:25,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2021-08-21 11:59:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:25,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:25,934 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:25,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-21 11:59:25,934 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash -974981978, now seen corresponding path program 17 times [2021-08-21 11:59:25,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:25,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432019134] [2021-08-21 11:59:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:25,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:25,989 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 11:59:25,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:25,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432019134] [2021-08-21 11:59:25,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432019134] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:25,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:25,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:25,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11510159] [2021-08-21 11:59:25,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:25,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:25,990 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:26,091 INFO L93 Difference]: Finished difference Result 64 states and 95 transitions. [2021-08-21 11:59:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:59:26,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:26,091 INFO L225 Difference]: With dead ends: 64 [2021-08-21 11:59:26,091 INFO L226 Difference]: Without dead ends: 41 [2021-08-21 11:59:26,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-21 11:59:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-08-21 11:59:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 52 transitions. [2021-08-21 11:59:26,093 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 52 transitions. Word has length 18 [2021-08-21 11:59:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:26,093 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 52 transitions. [2021-08-21 11:59:26,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 52 transitions. [2021-08-21 11:59:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:26,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:26,093 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:26,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-21 11:59:26,093 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756154, now seen corresponding path program 18 times [2021-08-21 11:59:26,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:26,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954549029] [2021-08-21 11:59:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:26,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:26,147 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 11:59:26,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:26,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954549029] [2021-08-21 11:59:26,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954549029] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:26,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:26,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:26,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438948539] [2021-08-21 11:59:26,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:26,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:26,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:26,148 INFO L87 Difference]: Start difference. First operand 35 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:26,229 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-08-21 11:59:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:26,230 INFO L225 Difference]: With dead ends: 50 [2021-08-21 11:59:26,230 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 11:59:26,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 11:59:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-21 11:59:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-08-21 11:59:26,231 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2021-08-21 11:59:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:26,231 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-21 11:59:26,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-08-21 11:59:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:26,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:26,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:26,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-21 11:59:26,232 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:26,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922456, now seen corresponding path program 19 times [2021-08-21 11:59:26,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:26,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207034334] [2021-08-21 11:59:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:26,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:26,299 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 11:59:26,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:26,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207034334] [2021-08-21 11:59:26,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207034334] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:26,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:26,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:26,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397845356] [2021-08-21 11:59:26,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:26,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:26,301 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:26,377 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-08-21 11:59:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:26,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:26,378 INFO L225 Difference]: With dead ends: 38 [2021-08-21 11:59:26,378 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 11:59:26,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 11:59:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-08-21 11:59:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-08-21 11:59:26,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2021-08-21 11:59:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:26,379 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-08-21 11:59:26,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-08-21 11:59:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 11:59:26,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:26,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:26,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-21 11:59:26,380 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558458, now seen corresponding path program 20 times [2021-08-21 11:59:26,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:26,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134577342] [2021-08-21 11:59:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:26,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:26,434 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 11:59:26,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:26,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134577342] [2021-08-21 11:59:26,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134577342] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:26,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:26,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:59:26,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819866791] [2021-08-21 11:59:26,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:26,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:26,436 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:26,510 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-08-21 11:59:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:59:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 11:59:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:26,510 INFO L225 Difference]: With dead ends: 27 [2021-08-21 11:59:26,510 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 11:59:26,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 11:59:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 11:59:26,511 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) [2021-08-21 11:59:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 11:59:26,511 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-08-21 11:59:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:26,511 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 11:59:26,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 11:59:26,511 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 11:59:26,513 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 11:59:26,514 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 11:59:26,514 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 11:59:26,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-21 11:59:26,517 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 11:59:26,517 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 11:59:26,519 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:59:26 BasicIcfg [2021-08-21 11:59:26,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 11:59:26,520 INFO L168 Benchmark]: Toolchain (without parser) took 7404.46 ms. Allocated memory was 172.0 MB in the beginning and 352.3 MB in the end (delta: 180.4 MB). Free memory was 152.5 MB in the beginning and 265.2 MB in the end (delta: -112.7 MB). Peak memory consumption was 67.2 MB. Max. memory is 8.0 GB. [2021-08-21 11:59:26,520 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 172.0 MB. Free memory is still 153.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 11:59:26,520 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.12 ms. Allocated memory is still 172.0 MB. Free memory was 152.5 MB in the beginning and 151.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 11:59:26,520 INFO L168 Benchmark]: Boogie Preprocessor took 12.04 ms. Allocated memory is still 172.0 MB. Free memory was 151.0 MB in the beginning and 150.1 MB in the end (delta: 892.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 11:59:26,520 INFO L168 Benchmark]: RCFGBuilder took 169.38 ms. Allocated memory is still 172.0 MB. Free memory was 150.0 MB in the beginning and 139.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-21 11:59:26,521 INFO L168 Benchmark]: TraceAbstraction took 7195.57 ms. Allocated memory was 172.0 MB in the beginning and 352.3 MB in the end (delta: 180.4 MB). Free memory was 138.8 MB in the beginning and 265.2 MB in the end (delta: -126.4 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. [2021-08-21 11:59:26,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 172.0 MB. Free memory is still 153.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.12 ms. Allocated memory is still 172.0 MB. Free memory was 152.5 MB in the beginning and 151.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.04 ms. Allocated memory is still 172.0 MB. Free memory was 151.0 MB in the beginning and 150.1 MB in the end (delta: 892.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 169.38 ms. Allocated memory is still 172.0 MB. Free memory was 150.0 MB in the beginning and 139.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7195.57 ms. Allocated memory was 172.0 MB in the beginning and 352.3 MB in the end (delta: 180.4 MB). Free memory was 138.8 MB in the beginning and 265.2 MB in the end (delta: -126.4 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 69]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 43 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 7141.7ms, OverallIterations: 48, TraceHistogramMax: 1, EmptinessCheckTime: 23.3ms, AutomataDifference: 4124.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2186 SDtfs, 2999 SDslu, 6783 SDs, 0 SdLazy, 2182 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 983.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 562 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3922.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=27, InterpolantAutomatonStates: 359, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 139.6ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1618 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.4ms SsaConstructionTime, 83.0ms SatisfiabilityAnalysisTime, 2484.4ms InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 5483 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 PerfectInterpolantSequences, 0/0 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! [2021-08-21 11:59:26,544 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...