/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/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:00:11,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:00:11,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:00:12,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:00:12,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 13:00:12,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 13:00:12,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 13:00:12,075 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 13:00:12,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:00:12,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:00:12,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:00:12,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:00:12,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:00:12,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:00:12,110 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:00:12,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:00:12,110 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:00:12,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:00:12,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:00:12,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:00:12,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:00:12,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:00:12,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:00:12,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:00:12,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:00:12,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:00:12,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:00:12,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:00:12,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:00:12,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:00:12,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:00:12,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:00:12,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:00:12,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:00:12,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:00:12,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:00:12,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:00:12,114 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:00:12,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:00:12,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:00:12,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:00:12,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:00:12,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:00:12,467 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:00:12,468 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:00:12,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-08-21 13:00:12,469 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-08-21 13:00:12,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:00:12,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:00:12,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:00:12,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:00:12,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:00:12,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:00:12,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:00:12,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:00:12,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:00:12,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:00:12,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:00:12,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:00:12,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:00:12,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/1) ... [2021-08-21 13:00:12,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:00:12,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:12,595 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 13:00:12,602 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 13:00:12,646 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:00:12,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:00:12,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:00:12,646 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:00:12,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:00:12,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:00:12,647 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:00:12,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:00:12,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:00:12,648 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 13:00:12,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:00:12,809 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:00:12,811 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:00:12 BoogieIcfgContainer [2021-08-21 13:00:12,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:00:12,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:00:12,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:00:12,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:00:12,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:00:12" (1/2) ... [2021-08-21 13:00:12,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e8df87 and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:00:12, skipping insertion in model container [2021-08-21 13:00:12,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:00:12" (2/2) ... [2021-08-21 13:00:12,826 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-08-21 13:00:12,830 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:00:12,831 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:00:12,831 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:00:12,831 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:00:12,881 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 13:00:12,916 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:00:12,923 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 13:00:12,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 13:00:12,931 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-08-21 13:00:12,941 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 13:00:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 13:00:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 13:00:12,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:12,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:12,955 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1895407217, now seen corresponding path program 1 times [2021-08-21 13:00:12,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:12,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822163189] [2021-08-21 13:00:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:12,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:13,110 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 13:00:13,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:13,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822163189] [2021-08-21 13:00:13,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822163189] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:00:13,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:00:13,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:00:13,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744029119] [2021-08-21 13:00:13,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:00:13,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:00:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:00:13,138 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 13:00:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:13,196 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-08-21 13:00:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:00:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-08-21 13:00:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:13,206 INFO L225 Difference]: With dead ends: 38 [2021-08-21 13:00:13,206 INFO L226 Difference]: Without dead ends: 38 [2021-08-21 13:00:13,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:00:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-21 13:00:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-21 13:00:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 13:00:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-08-21 13:00:13,247 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-08-21 13:00:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:13,247 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-08-21 13:00:13,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states 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 13:00:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-08-21 13:00:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 13:00:13,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:13,250 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 13:00:13,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:00:13,251 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:13,256 INFO L82 PathProgramCache]: Analyzing trace with hash 161461187, now seen corresponding path program 1 times [2021-08-21 13:00:13,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:13,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094961146] [2021-08-21 13:00:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:13,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:13,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:13,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094961146] [2021-08-21 13:00:13,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094961146] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:00:13,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:00:13,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:00:13,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956811088] [2021-08-21 13:00:13,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:00:13,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:00:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:00:13,334 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 13:00:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:13,373 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-08-21 13:00:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:00:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 13:00:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:13,376 INFO L225 Difference]: With dead ends: 62 [2021-08-21 13:00:13,377 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 13:00:13,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:00:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 13:00:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-08-21 13:00:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 13:00:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-08-21 13:00:13,398 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-08-21 13:00:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:13,398 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-08-21 13:00:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 13:00:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-08-21 13:00:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:00:13,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:13,401 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:13,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:00:13,401 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1536775877, now seen corresponding path program 1 times [2021-08-21 13:00:13,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:13,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109616982] [2021-08-21 13:00:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:13,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:00:13,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:13,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109616982] [2021-08-21 13:00:13,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109616982] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:00:13,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:00:13,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:00:13,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992665669] [2021-08-21 13:00:13,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:00:13,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:00:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:00:13,481 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:13,507 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-08-21 13:00:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:00:13,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 13:00:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:13,512 INFO L225 Difference]: With dead ends: 87 [2021-08-21 13:00:13,512 INFO L226 Difference]: Without dead ends: 87 [2021-08-21 13:00:13,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:00:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-21 13:00:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-08-21 13:00:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 13:00:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-08-21 13:00:13,527 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-08-21 13:00:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:13,528 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-08-21 13:00:13,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-08-21 13:00:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:00:13,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:13,529 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:13,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:00:13,529 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1011707577, now seen corresponding path program 2 times [2021-08-21 13:00:13,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:13,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580291163] [2021-08-21 13:00:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:13,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:13,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:13,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580291163] [2021-08-21 13:00:13,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580291163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:13,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275626088] [2021-08-21 13:00:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:00:13,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:13,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:13,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:13,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 13:00:13,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:13,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:00:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:14,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275626088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:14,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:14,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 13:00:14,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628286696] [2021-08-21 13:00:14,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:00:14,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:00:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:00:14,991 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:15,402 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-08-21 13:00:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:00:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:00:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:15,403 INFO L225 Difference]: With dead ends: 116 [2021-08-21 13:00:15,403 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 13:00:15,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 580.6ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:00:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 13:00:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-08-21 13:00:15,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 13:00:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-08-21 13:00:15,409 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-08-21 13:00:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:15,409 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-08-21 13:00:15,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-08-21 13:00:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:00:15,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:15,411 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:15,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 13:00:15,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:15,625 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:15,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1602763079, now seen corresponding path program 3 times [2021-08-21 13:00:15,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:15,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714568287] [2021-08-21 13:00:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:15,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:15,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:15,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714568287] [2021-08-21 13:00:15,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714568287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:15,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608454508] [2021-08-21 13:00:15,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:00:15,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:15,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:15,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:15,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 13:00:16,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:00:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:00:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:16,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608454508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:16,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:16,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 13:00:16,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61659819] [2021-08-21 13:00:16,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:00:16,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:00:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:00:16,950 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:17,511 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-08-21 13:00:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:00:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:00:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:17,513 INFO L225 Difference]: With dead ends: 163 [2021-08-21 13:00:17,513 INFO L226 Difference]: Without dead ends: 149 [2021-08-21 13:00:17,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 733.8ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:00:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-21 13:00:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-08-21 13:00:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 13:00:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-08-21 13:00:17,519 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-08-21 13:00:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-08-21 13:00:17,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-08-21 13:00:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:00:17,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:17,520 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:17,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 13:00:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:17,736 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:17,736 INFO L82 PathProgramCache]: Analyzing trace with hash -995630777, now seen corresponding path program 4 times [2021-08-21 13:00:17,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:17,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528328832] [2021-08-21 13:00:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:17,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:18,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:18,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528328832] [2021-08-21 13:00:18,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528328832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:18,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069740193] [2021-08-21 13:00:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:00:18,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:18,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:18,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 13:00:18,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:18,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:18,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:00:18,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:18,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069740193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:18,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:18,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 13:00:18,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367369052] [2021-08-21 13:00:18,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:00:18,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:00:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:00:18,951 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:19,905 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-08-21 13:00:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:00:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:00:19,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:19,909 INFO L225 Difference]: With dead ends: 201 [2021-08-21 13:00:19,909 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 13:00:19,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 923.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:00:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 13:00:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-08-21 13:00:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 13:00:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-08-21 13:00:19,928 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-08-21 13:00:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:19,928 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-08-21 13:00:19,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-08-21 13:00:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:00:19,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:19,930 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:19,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:20,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:20,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2016379011, now seen corresponding path program 5 times [2021-08-21 13:00:20,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:20,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55537136] [2021-08-21 13:00:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:20,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:20,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:20,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55537136] [2021-08-21 13:00:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55537136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:20,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588569964] [2021-08-21 13:00:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:00:20,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:20,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:20,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 13:00:20,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:20,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:00:20,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:21,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588569964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:21,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:21,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 13:00:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174671193] [2021-08-21 13:00:21,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:00:21,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:00:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:00:21,252 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:21,727 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-08-21 13:00:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:00:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:00:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:21,728 INFO L225 Difference]: With dead ends: 144 [2021-08-21 13:00:21,728 INFO L226 Difference]: Without dead ends: 130 [2021-08-21 13:00:21,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:00:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-21 13:00:21,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 96. [2021-08-21 13:00:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 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 13:00:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-08-21 13:00:21,733 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 22 [2021-08-21 13:00:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:21,733 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-08-21 13:00:21,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-08-21 13:00:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:00:21,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:21,745 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:21,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:21,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:21,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash -582014845, now seen corresponding path program 6 times [2021-08-21 13:00:21,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:21,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745670417] [2021-08-21 13:00:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:21,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:22,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:22,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745670417] [2021-08-21 13:00:22,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745670417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:22,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611499393] [2021-08-21 13:00:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:00:22,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:22,204 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:22,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 13:00:22,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:00:22,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:00:22,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:23,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611499393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:23,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:23,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-21 13:00:23,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442660925] [2021-08-21 13:00:23,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:00:23,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:23,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:00:23,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:00:23,173 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:23,880 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-08-21 13:00:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:00:23,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:00:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:23,884 INFO L225 Difference]: With dead ends: 199 [2021-08-21 13:00:23,884 INFO L226 Difference]: Without dead ends: 167 [2021-08-21 13:00:23,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 716.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:00:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-21 13:00:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 94. [2021-08-21 13:00:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 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 13:00:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 185 transitions. [2021-08-21 13:00:23,894 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 185 transitions. Word has length 22 [2021-08-21 13:00:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:23,896 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 185 transitions. [2021-08-21 13:00:23,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 185 transitions. [2021-08-21 13:00:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:00:23,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:23,897 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:23,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:24,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:24,121 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1739125057, now seen corresponding path program 7 times [2021-08-21 13:00:24,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:24,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31408765] [2021-08-21 13:00:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:24,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:24,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:24,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31408765] [2021-08-21 13:00:24,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31408765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:24,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455494050] [2021-08-21 13:00:24,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:24,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:24,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:24,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:24,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 13:00:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:24,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:00:24,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:25,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455494050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:25,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:25,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 13:00:25,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916149012] [2021-08-21 13:00:25,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:00:25,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:00:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:00:25,284 INFO L87 Difference]: Start difference. First operand 94 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:25,680 INFO L93 Difference]: Finished difference Result 178 states and 341 transitions. [2021-08-21 13:00:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:00:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:00:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:25,682 INFO L225 Difference]: With dead ends: 178 [2021-08-21 13:00:25,682 INFO L226 Difference]: Without dead ends: 136 [2021-08-21 13:00:25,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:00:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-21 13:00:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2021-08-21 13:00:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 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 13:00:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 185 transitions. [2021-08-21 13:00:25,686 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 185 transitions. Word has length 22 [2021-08-21 13:00:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:25,686 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 185 transitions. [2021-08-21 13:00:25,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 185 transitions. [2021-08-21 13:00:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:00:25,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:25,687 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:25,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 13:00:25,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:25,901 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1223751555, now seen corresponding path program 8 times [2021-08-21 13:00:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:25,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189099515] [2021-08-21 13:00:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:25,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:26,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:26,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189099515] [2021-08-21 13:00:26,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189099515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:26,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630943819] [2021-08-21 13:00:26,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:00:26,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:26,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:26,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:26,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 13:00:26,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:26,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:00:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:27,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630943819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:27,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:27,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 13:00:27,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632798303] [2021-08-21 13:00:27,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:00:27,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:00:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:00:27,233 INFO L87 Difference]: Start difference. First operand 94 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:27,655 INFO L93 Difference]: Finished difference Result 222 states and 426 transitions. [2021-08-21 13:00:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:00:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:00:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:27,656 INFO L225 Difference]: With dead ends: 222 [2021-08-21 13:00:27,656 INFO L226 Difference]: Without dead ends: 180 [2021-08-21 13:00:27,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 475.6ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:00:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-21 13:00:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 100. [2021-08-21 13:00:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-08-21 13:00:27,661 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 22 [2021-08-21 13:00:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:27,661 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-08-21 13:00:27,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-08-21 13:00:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:00:27,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:27,662 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:27,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:27,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:27,873 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash -276952247, now seen corresponding path program 9 times [2021-08-21 13:00:27,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:27,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697887351] [2021-08-21 13:00:27,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:27,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:00:28,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:28,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697887351] [2021-08-21 13:00:28,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697887351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:28,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254620884] [2021-08-21 13:00:28,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:00:28,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:28,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:28,086 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:28,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 13:00:28,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:00:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:00:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:29,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254620884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:29,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:29,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-21 13:00:29,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620995581] [2021-08-21 13:00:29,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 13:00:29,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:29,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 13:00:29,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:00:29,137 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:29,506 INFO L93 Difference]: Finished difference Result 196 states and 362 transitions. [2021-08-21 13:00:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:00:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:00:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:29,507 INFO L225 Difference]: With dead ends: 196 [2021-08-21 13:00:29,507 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 13:00:29,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:00:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 13:00:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-08-21 13:00:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 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 13:00:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-08-21 13:00:29,512 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-08-21 13:00:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:29,512 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-08-21 13:00:29,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-08-21 13:00:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:00:29,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:29,513 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:29,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:29,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 13:00:29,733 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:29,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1905230277, now seen corresponding path program 10 times [2021-08-21 13:00:29,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:29,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044609713] [2021-08-21 13:00:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:29,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:00:29,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:29,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044609713] [2021-08-21 13:00:29,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044609713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:29,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638136891] [2021-08-21 13:00:29,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:00:29,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:29,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:29,965 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:29,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 13:00:30,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:00:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:31,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638136891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:31,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:31,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-21 13:00:31,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918867960] [2021-08-21 13:00:31,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 13:00:31,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 13:00:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:00:31,352 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:31,891 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-08-21 13:00:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:00:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:00:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:31,892 INFO L225 Difference]: With dead ends: 183 [2021-08-21 13:00:31,892 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 13:00:31,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:00:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 13:00:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-08-21 13:00:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 13:00:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-08-21 13:00:31,897 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-08-21 13:00:31,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:31,897 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-08-21 13:00:31,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-08-21 13:00:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:00:31,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:31,898 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:31,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:32,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:32,109 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash -310443191, now seen corresponding path program 11 times [2021-08-21 13:00:32,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:32,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149061820] [2021-08-21 13:00:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:32,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:00:32,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:32,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149061820] [2021-08-21 13:00:32,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149061820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:32,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667654343] [2021-08-21 13:00:32,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:00:32,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:32,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:32,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:32,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 13:00:32,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:00:32,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:32,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 13:00:32,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667654343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:33,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:33,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 13:00:33,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022934841] [2021-08-21 13:00:33,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:00:33,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:00:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:00:33,933 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:34,843 INFO L93 Difference]: Finished difference Result 193 states and 361 transitions. [2021-08-21 13:00:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:00:34,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:00:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:34,845 INFO L225 Difference]: With dead ends: 193 [2021-08-21 13:00:34,845 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 13:00:34,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1008.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:00:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 13:00:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 124. [2021-08-21 13:00:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 13:00:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-08-21 13:00:34,855 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-08-21 13:00:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:34,856 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-08-21 13:00:34,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-08-21 13:00:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:00:34,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:34,857 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:34,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:35,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 13:00:35,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 290399277, now seen corresponding path program 12 times [2021-08-21 13:00:35,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:35,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044198041] [2021-08-21 13:00:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:35,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:35,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:35,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044198041] [2021-08-21 13:00:35,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044198041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:35,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329402505] [2021-08-21 13:00:35,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:00:35,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:35,301 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:35,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 13:00:35,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:00:35,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:00:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:36,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329402505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:36,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:36,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 13:00:36,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635532533] [2021-08-21 13:00:36,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:00:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:00:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:00:36,576 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:36,951 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-08-21 13:00:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:00:36,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:00:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:36,952 INFO L225 Difference]: With dead ends: 168 [2021-08-21 13:00:36,952 INFO L226 Difference]: Without dead ends: 143 [2021-08-21 13:00:36,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 540.9ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:00:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-21 13:00:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-08-21 13:00:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 13:00:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-08-21 13:00:36,956 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-08-21 13:00:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:36,956 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-08-21 13:00:36,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-08-21 13:00:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:00:36,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:36,957 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:36,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:37,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 13:00:37,173 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:37,173 INFO L82 PathProgramCache]: Analyzing trace with hash 51506161, now seen corresponding path program 13 times [2021-08-21 13:00:37,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:37,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291142119] [2021-08-21 13:00:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:37,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:37,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:37,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291142119] [2021-08-21 13:00:37,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291142119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:37,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670507688] [2021-08-21 13:00:37,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:37,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:37,393 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:37,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 13:00:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:00:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:38,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670507688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:38,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:38,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 13:00:38,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815333407] [2021-08-21 13:00:38,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 13:00:38,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 13:00:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:00:38,729 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:39,162 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-08-21 13:00:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:00:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:00:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:39,164 INFO L225 Difference]: With dead ends: 163 [2021-08-21 13:00:39,164 INFO L226 Difference]: Without dead ends: 138 [2021-08-21 13:00:39,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:00:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-21 13:00:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-08-21 13:00:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:00:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-08-21 13:00:39,168 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-08-21 13:00:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-08-21 13:00:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-08-21 13:00:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:00:39,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:39,169 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:39,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:39,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 13:00:39,377 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash -144321993, now seen corresponding path program 14 times [2021-08-21 13:00:39,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:39,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483395059] [2021-08-21 13:00:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:39,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:39,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:39,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483395059] [2021-08-21 13:00:39,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483395059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:39,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71329735] [2021-08-21 13:00:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:00:39,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:39,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:39,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 13:00:40,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:40,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:00:40,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:41,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71329735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:41,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:41,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-21 13:00:41,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543204865] [2021-08-21 13:00:41,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:00:41,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:41,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:00:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:00:41,096 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:41,714 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-08-21 13:00:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:00:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:00:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:41,716 INFO L225 Difference]: With dead ends: 277 [2021-08-21 13:00:41,716 INFO L226 Difference]: Without dead ends: 263 [2021-08-21 13:00:41,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:00:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-21 13:00:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-08-21 13:00:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 13:00:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-08-21 13:00:41,721 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-08-21 13:00:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:41,721 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-08-21 13:00:41,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-08-21 13:00:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:00:41,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:41,722 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:41,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:41,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 13:00:41,933 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -193889737, now seen corresponding path program 15 times [2021-08-21 13:00:41,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:41,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260879472] [2021-08-21 13:00:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:41,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:42,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:42,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260879472] [2021-08-21 13:00:42,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260879472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:42,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527721174] [2021-08-21 13:00:42,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:00:42,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:42,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:42,190 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:42,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 13:00:42,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:00:42,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:00:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:43,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527721174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:43,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:43,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 13:00:43,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491352814] [2021-08-21 13:00:43,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:00:43,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:00:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:00:43,726 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:45,098 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-08-21 13:00:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 13:00:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:00:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:45,100 INFO L225 Difference]: With dead ends: 345 [2021-08-21 13:00:45,100 INFO L226 Difference]: Without dead ends: 331 [2021-08-21 13:00:45,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1400.2ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 13:00:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-08-21 13:00:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-08-21 13:00:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 13:00:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-08-21 13:00:45,107 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-08-21 13:00:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:45,107 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-08-21 13:00:45,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-08-21 13:00:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:00:45,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:45,108 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:45,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:45,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:45,321 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1874386377, now seen corresponding path program 16 times [2021-08-21 13:00:45,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:45,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599204934] [2021-08-21 13:00:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:45,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:45,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:45,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599204934] [2021-08-21 13:00:45,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599204934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:45,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164933956] [2021-08-21 13:00:45,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:00:45,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:45,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:45,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:45,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 13:00:46,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:00:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:47,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164933956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:47,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:47,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 13:00:47,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477279256] [2021-08-21 13:00:47,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:00:47,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:00:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:00:47,189 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:49,081 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-08-21 13:00:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 13:00:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:00:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:49,083 INFO L225 Difference]: With dead ends: 351 [2021-08-21 13:00:49,083 INFO L226 Difference]: Without dead ends: 337 [2021-08-21 13:00:49,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 1748.3ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 13:00:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-21 13:00:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-08-21 13:00:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states 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 13:00:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-08-21 13:00:49,089 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-08-21 13:00:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:49,089 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-08-21 13:00:49,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-08-21 13:00:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:00:49,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:49,090 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:49,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:49,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 13:00:49,291 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:49,291 INFO L82 PathProgramCache]: Analyzing trace with hash -177812937, now seen corresponding path program 17 times [2021-08-21 13:00:49,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:49,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829217360] [2021-08-21 13:00:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:49,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:49,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829217360] [2021-08-21 13:00:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829217360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962696580] [2021-08-21 13:00:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:00:49,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:49,559 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:49,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 13:00:50,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:00:50,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:50,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:00:50,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:51,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962696580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:51,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:51,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-21 13:00:51,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082935362] [2021-08-21 13:00:51,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:00:51,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:00:51,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:00:51,472 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:54,789 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-08-21 13:00:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-21 13:00:54,790 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:00:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:54,791 INFO L225 Difference]: With dead ends: 411 [2021-08-21 13:00:54,791 INFO L226 Difference]: Without dead ends: 366 [2021-08-21 13:00:54,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 3013.2ms TimeCoverageRelationStatistics Valid=1068, Invalid=7862, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 13:00:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-08-21 13:00:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-08-21 13:00:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 13:00:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-08-21 13:00:54,798 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-08-21 13:00:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:54,798 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-08-21 13:00:54,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-08-21 13:00:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:00:54,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:54,799 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:54,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:55,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:55,013 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 887148975, now seen corresponding path program 18 times [2021-08-21 13:00:55,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:55,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108019378] [2021-08-21 13:00:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:55,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:55,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:55,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108019378] [2021-08-21 13:00:55,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108019378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:55,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897494143] [2021-08-21 13:00:55,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:00:55,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:55,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:55,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:55,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 13:00:56,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:00:56,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:00:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:57,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897494143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:57,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:57,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 13:00:57,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485629999] [2021-08-21 13:00:57,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:00:57,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:57,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:00:57,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:00:57,043 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:58,008 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-08-21 13:00:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:00:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:00:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:58,010 INFO L225 Difference]: With dead ends: 331 [2021-08-21 13:00:58,010 INFO L226 Difference]: Without dead ends: 317 [2021-08-21 13:00:58,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:00:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-21 13:00:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-08-21 13:00:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 13:00:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-08-21 13:00:58,016 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-08-21 13:00:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:58,017 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-08-21 13:00:58,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-08-21 13:00:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:00:58,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:58,017 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:58,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:58,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:58,232 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:00:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:58,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1711244881, now seen corresponding path program 19 times [2021-08-21 13:00:58,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:58,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172513741] [2021-08-21 13:00:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:58,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:58,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:58,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172513741] [2021-08-21 13:00:58,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172513741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:58,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791747117] [2021-08-21 13:00:58,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:58,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:58,505 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:58,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 13:00:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:59,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:00:59,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:00,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791747117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:00,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:00,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 13:01:00,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687156409] [2021-08-21 13:01:00,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:01:00,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:00,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:01:00,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:01:00,200 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:01,552 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-08-21 13:01:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 13:01:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:01,554 INFO L225 Difference]: With dead ends: 389 [2021-08-21 13:01:01,554 INFO L226 Difference]: Without dead ends: 357 [2021-08-21 13:01:01,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1316.3ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 13:01:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-21 13:01:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-08-21 13:01:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 13:01:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-08-21 13:01:01,561 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-08-21 13:01:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:01,561 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-08-21 13:01:01,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-08-21 13:01:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:01,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:01,562 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:01,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:01,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:01,777 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1426612203, now seen corresponding path program 20 times [2021-08-21 13:01:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:01,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815455217] [2021-08-21 13:01:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:01,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:02,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:02,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815455217] [2021-08-21 13:01:02,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815455217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:02,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747999079] [2021-08-21 13:01:02,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:01:02,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:02,028 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:02,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 13:01:03,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:01:03,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:01:03,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:03,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747999079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:03,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:03,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 13:01:03,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054178526] [2021-08-21 13:01:03,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:01:03,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:01:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:01:03,821 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:04,940 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-08-21 13:01:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:01:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:04,942 INFO L225 Difference]: With dead ends: 364 [2021-08-21 13:01:04,942 INFO L226 Difference]: Without dead ends: 322 [2021-08-21 13:01:04,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1109.5ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:01:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-21 13:01:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-08-21 13:01:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 13:01:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-08-21 13:01:04,948 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-08-21 13:01:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:04,948 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-08-21 13:01:04,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-08-21 13:01:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:04,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:04,949 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:04,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:05,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:05,164 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:05,164 INFO L82 PathProgramCache]: Analyzing trace with hash 648255859, now seen corresponding path program 21 times [2021-08-21 13:01:05,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:05,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913803288] [2021-08-21 13:01:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:05,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:05,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:05,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913803288] [2021-08-21 13:01:05,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913803288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:05,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362104159] [2021-08-21 13:01:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:05,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:05,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:05,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:05,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 13:01:06,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:01:06,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:06,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:01:06,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:07,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362104159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:07,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:07,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-21 13:01:07,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476934813] [2021-08-21 13:01:07,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:01:07,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:01:07,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:01:07,351 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:08,407 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-08-21 13:01:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:01:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:08,409 INFO L225 Difference]: With dead ends: 410 [2021-08-21 13:01:08,409 INFO L226 Difference]: Without dead ends: 396 [2021-08-21 13:01:08,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1111.3ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:01:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-21 13:01:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-08-21 13:01:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 13:01:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-08-21 13:01:08,416 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-08-21 13:01:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:08,416 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-08-21 13:01:08,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-08-21 13:01:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:08,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:08,417 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:08,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:08,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 13:01:08,633 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:08,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1950137997, now seen corresponding path program 22 times [2021-08-21 13:01:08,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:08,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299488000] [2021-08-21 13:01:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:08,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:08,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299488000] [2021-08-21 13:01:08,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299488000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34660209] [2021-08-21 13:01:08,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:08,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:08,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:08,898 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:08,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 13:01:10,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:01:10,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:10,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:01:10,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:10,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34660209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:10,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:10,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 13:01:10,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561158110] [2021-08-21 13:01:10,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:01:10,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:10,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:01:10,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:01:10,759 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:12,513 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-08-21 13:01:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 13:01:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:12,515 INFO L225 Difference]: With dead ends: 464 [2021-08-21 13:01:12,515 INFO L226 Difference]: Without dead ends: 432 [2021-08-21 13:01:12,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1498.0ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 13:01:12,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-21 13:01:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-08-21 13:01:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 13:01:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-08-21 13:01:12,522 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-08-21 13:01:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:12,522 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-08-21 13:01:12,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-08-21 13:01:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:12,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:12,523 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:12,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:12,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 13:01:12,737 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1187719087, now seen corresponding path program 23 times [2021-08-21 13:01:12,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:12,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335109533] [2021-08-21 13:01:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:12,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:12,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:12,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335109533] [2021-08-21 13:01:12,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335109533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:12,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385101019] [2021-08-21 13:01:12,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:01:12,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:12,981 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:12,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 13:01:14,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:01:14,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:01:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:14,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385101019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:14,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:14,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 13:01:14,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659194641] [2021-08-21 13:01:14,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:01:14,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:01:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:01:14,831 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:15,913 INFO L93 Difference]: Finished difference Result 459 states and 944 transitions. [2021-08-21 13:01:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:01:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:15,915 INFO L225 Difference]: With dead ends: 459 [2021-08-21 13:01:15,915 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 13:01:15,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1066.3ms TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:01:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 13:01:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 210. [2021-08-21 13:01:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.148325358851675) internal successors, (449), 209 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 13:01:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 449 transitions. [2021-08-21 13:01:15,934 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 449 transitions. Word has length 27 [2021-08-21 13:01:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:15,934 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 449 transitions. [2021-08-21 13:01:15,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 449 transitions. [2021-08-21 13:01:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:15,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:15,936 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:15,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:16,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:16,149 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -144371597, now seen corresponding path program 24 times [2021-08-21 13:01:16,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:16,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791712331] [2021-08-21 13:01:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:16,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:16,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:16,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791712331] [2021-08-21 13:01:16,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791712331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:16,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458271288] [2021-08-21 13:01:16,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:01:16,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:16,389 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:16,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 13:01:17,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:01:17,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:01:17,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:18,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458271288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:18,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:18,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 13:01:18,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497295686] [2021-08-21 13:01:18,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:01:18,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:01:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:01:18,362 INFO L87 Difference]: Start difference. First operand 210 states and 449 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:19,697 INFO L93 Difference]: Finished difference Result 504 states and 1024 transitions. [2021-08-21 13:01:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 13:01:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:19,698 INFO L225 Difference]: With dead ends: 504 [2021-08-21 13:01:19,698 INFO L226 Difference]: Without dead ends: 462 [2021-08-21 13:01:19,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1184.8ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:01:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-21 13:01:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 186. [2021-08-21 13:01:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1135135135135137) internal successors, (391), 185 states have internal predecessors, (391), 0 states have call successors, (0), 0 states 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 13:01:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 391 transitions. [2021-08-21 13:01:19,704 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 391 transitions. Word has length 27 [2021-08-21 13:01:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:19,704 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 391 transitions. [2021-08-21 13:01:19,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 391 transitions. [2021-08-21 13:01:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:19,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:19,705 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:19,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:19,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:19,913 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1153733039, now seen corresponding path program 25 times [2021-08-21 13:01:19,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:19,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466082865] [2021-08-21 13:01:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:19,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:20,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:20,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466082865] [2021-08-21 13:01:20,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466082865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:20,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947825399] [2021-08-21 13:01:20,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:01:20,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:20,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:20,111 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:20,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 13:01:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:01:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:22,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947825399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:22,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:22,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 13:01:22,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095274096] [2021-08-21 13:01:22,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:01:22,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:01:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:01:22,172 INFO L87 Difference]: Start difference. First operand 186 states and 391 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:23,181 INFO L93 Difference]: Finished difference Result 537 states and 1060 transitions. [2021-08-21 13:01:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:01:23,190 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:23,192 INFO L225 Difference]: With dead ends: 537 [2021-08-21 13:01:23,192 INFO L226 Difference]: Without dead ends: 523 [2021-08-21 13:01:23,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 960.9ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:01:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-21 13:01:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 267. [2021-08-21 13:01:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.206766917293233) internal successors, (587), 266 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 13:01:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 587 transitions. [2021-08-21 13:01:23,198 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 587 transitions. Word has length 27 [2021-08-21 13:01:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:23,199 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 587 transitions. [2021-08-21 13:01:23,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 587 transitions. [2021-08-21 13:01:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:23,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:23,200 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:23,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:23,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 13:01:23,425 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:23,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1444660817, now seen corresponding path program 26 times [2021-08-21 13:01:23,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:23,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141999451] [2021-08-21 13:01:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:23,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:23,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:23,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141999451] [2021-08-21 13:01:23,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141999451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:23,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799592079] [2021-08-21 13:01:23,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:01:23,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:23,627 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:23,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 13:01:24,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:01:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:01:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:25,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799592079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:25,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:25,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:01:25,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814664287] [2021-08-21 13:01:25,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:01:25,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:25,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:01:25,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:01:25,784 INFO L87 Difference]: Start difference. First operand 267 states and 587 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:27,491 INFO L93 Difference]: Finished difference Result 602 states and 1204 transitions. [2021-08-21 13:01:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 13:01:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:27,493 INFO L225 Difference]: With dead ends: 602 [2021-08-21 13:01:27,493 INFO L226 Difference]: Without dead ends: 582 [2021-08-21 13:01:27,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1497.8ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 13:01:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-08-21 13:01:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 267. [2021-08-21 13:01:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.206766917293233) internal successors, (587), 266 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 13:01:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 587 transitions. [2021-08-21 13:01:27,500 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 587 transitions. Word has length 27 [2021-08-21 13:01:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:27,500 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 587 transitions. [2021-08-21 13:01:27,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 587 transitions. [2021-08-21 13:01:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:27,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:27,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:27,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:27,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 13:01:27,717 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1693196267, now seen corresponding path program 27 times [2021-08-21 13:01:27,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:27,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350160180] [2021-08-21 13:01:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:27,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:27,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:27,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350160180] [2021-08-21 13:01:27,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350160180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:27,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950906913] [2021-08-21 13:01:27,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:27,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:27,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:27,918 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:27,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 13:01:29,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:01:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:01:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:30,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950906913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:30,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:30,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:01:30,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416437118] [2021-08-21 13:01:30,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:01:30,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:01:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:01:30,022 INFO L87 Difference]: Start difference. First operand 267 states and 587 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:31,679 INFO L93 Difference]: Finished difference Result 653 states and 1315 transitions. [2021-08-21 13:01:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 13:01:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:31,681 INFO L225 Difference]: With dead ends: 653 [2021-08-21 13:01:31,681 INFO L226 Difference]: Without dead ends: 617 [2021-08-21 13:01:31,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1403.7ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 13:01:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-21 13:01:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 265. [2021-08-21 13:01:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1856060606060606) internal successors, (577), 264 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 13:01:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 577 transitions. [2021-08-21 13:01:31,688 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 577 transitions. Word has length 27 [2021-08-21 13:01:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:31,688 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 577 transitions. [2021-08-21 13:01:31,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 577 transitions. [2021-08-21 13:01:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:31,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:31,689 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:31,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:31,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 13:01:31,916 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:31,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1820958903, now seen corresponding path program 28 times [2021-08-21 13:01:31,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:31,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799083386] [2021-08-21 13:01:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:31,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:32,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:32,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799083386] [2021-08-21 13:01:32,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799083386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:32,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540776991] [2021-08-21 13:01:32,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:32,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:32,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:32,137 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:32,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 13:01:33,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:01:33,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:33,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:01:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:34,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540776991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:34,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:34,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 13:01:34,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149729777] [2021-08-21 13:01:34,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:01:34,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:34,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:01:34,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:01:34,338 INFO L87 Difference]: Start difference. First operand 265 states and 577 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:34,845 INFO L93 Difference]: Finished difference Result 389 states and 799 transitions. [2021-08-21 13:01:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:01:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:34,846 INFO L225 Difference]: With dead ends: 389 [2021-08-21 13:01:34,847 INFO L226 Difference]: Without dead ends: 375 [2021-08-21 13:01:34,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:01:34,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-21 13:01:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 277. [2021-08-21 13:01:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 13:01:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-08-21 13:01:34,851 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 27 [2021-08-21 13:01:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:34,852 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-08-21 13:01:34,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-08-21 13:01:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:34,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:34,853 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:34,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:35,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:35,069 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash 140462263, now seen corresponding path program 29 times [2021-08-21 13:01:35,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:35,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768149018] [2021-08-21 13:01:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:35,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:35,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:35,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768149018] [2021-08-21 13:01:35,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768149018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:35,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117668726] [2021-08-21 13:01:35,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:01:35,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:35,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:35,307 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:35,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 13:01:36,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:01:36,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:01:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:37,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117668726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:37,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:37,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-21 13:01:37,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181414235] [2021-08-21 13:01:37,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:01:37,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:01:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:01:37,551 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:38,491 INFO L93 Difference]: Finished difference Result 464 states and 955 transitions. [2021-08-21 13:01:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:01:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:38,493 INFO L225 Difference]: With dead ends: 464 [2021-08-21 13:01:38,493 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 13:01:38,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 949.9ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:01:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 13:01:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 279. [2021-08-21 13:01:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.197841726618705) internal successors, (611), 278 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 13:01:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 611 transitions. [2021-08-21 13:01:38,502 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 611 transitions. Word has length 27 [2021-08-21 13:01:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:38,502 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 611 transitions. [2021-08-21 13:01:38,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 611 transitions. [2021-08-21 13:01:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:38,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:38,503 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:38,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 13:01:38,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:38,717 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1837035703, now seen corresponding path program 30 times [2021-08-21 13:01:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:38,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969988262] [2021-08-21 13:01:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:38,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:38,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:38,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969988262] [2021-08-21 13:01:38,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969988262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:38,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780175303] [2021-08-21 13:01:38,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:01:38,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:38,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:38,981 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:38,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 13:01:40,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:01:40,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:01:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:41,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780175303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:41,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:41,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:01:41,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749810712] [2021-08-21 13:01:41,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:01:41,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:01:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:01:41,261 INFO L87 Difference]: Start difference. First operand 279 states and 611 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:42,576 INFO L93 Difference]: Finished difference Result 543 states and 1114 transitions. [2021-08-21 13:01:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:01:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:42,578 INFO L225 Difference]: With dead ends: 543 [2021-08-21 13:01:42,578 INFO L226 Difference]: Without dead ends: 511 [2021-08-21 13:01:42,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1248.5ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:01:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-08-21 13:01:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 277. [2021-08-21 13:01:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 13:01:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-08-21 13:01:42,584 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 27 [2021-08-21 13:01:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:42,585 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-08-21 13:01:42,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-08-21 13:01:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:42,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:42,586 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:42,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 13:01:42,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:42,801 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1093541423, now seen corresponding path program 31 times [2021-08-21 13:01:42,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:42,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666519002] [2021-08-21 13:01:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:42,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:43,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:43,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666519002] [2021-08-21 13:01:43,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666519002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:43,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683452081] [2021-08-21 13:01:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:01:43,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:43,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:43,025 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:43,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 13:01:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:01:44,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:45,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683452081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:45,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:45,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:01:45,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313235715] [2021-08-21 13:01:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:01:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:01:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:01:45,438 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:46,421 INFO L93 Difference]: Finished difference Result 491 states and 1033 transitions. [2021-08-21 13:01:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:01:46,422 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:46,424 INFO L225 Difference]: With dead ends: 491 [2021-08-21 13:01:46,424 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 13:01:46,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 921.0ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:01:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 13:01:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 277. [2021-08-21 13:01:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 13:01:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-08-21 13:01:46,430 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 27 [2021-08-21 13:01:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:46,430 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-08-21 13:01:46,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-08-21 13:01:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:46,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:46,431 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:46,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:46,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 13:01:46,641 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash -778012489, now seen corresponding path program 32 times [2021-08-21 13:01:46,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:46,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574440738] [2021-08-21 13:01:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:46,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:46,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:46,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574440738] [2021-08-21 13:01:46,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574440738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:46,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827342433] [2021-08-21 13:01:46,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:01:46,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:46,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:46,881 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:46,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 13:01:48,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:01:48,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:01:48,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827342433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:49,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:49,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 13:01:49,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634375144] [2021-08-21 13:01:49,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:01:49,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:01:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:01:49,320 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:50,091 INFO L93 Difference]: Finished difference Result 466 states and 977 transitions. [2021-08-21 13:01:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:01:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:50,093 INFO L225 Difference]: With dead ends: 466 [2021-08-21 13:01:50,093 INFO L226 Difference]: Without dead ends: 452 [2021-08-21 13:01:50,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 837.3ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:01:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-21 13:01:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 297. [2021-08-21 13:01:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.199324324324324) internal successors, (651), 296 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 13:01:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 651 transitions. [2021-08-21 13:01:50,099 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 651 transitions. Word has length 27 [2021-08-21 13:01:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:50,099 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 651 transitions. [2021-08-21 13:01:50,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 651 transitions. [2021-08-21 13:01:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:50,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:50,100 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:50,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:50,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:50,313 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:50,313 INFO L82 PathProgramCache]: Analyzing trace with hash 918560951, now seen corresponding path program 33 times [2021-08-21 13:01:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:50,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595196395] [2021-08-21 13:01:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:50,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:50,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:50,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595196395] [2021-08-21 13:01:50,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595196395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:50,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510655850] [2021-08-21 13:01:50,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:50,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:50,525 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:50,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 13:01:52,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:01:52,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:01:52,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:53,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510655850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:53,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:53,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:01:53,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800368877] [2021-08-21 13:01:53,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:01:53,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:01:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:01:53,055 INFO L87 Difference]: Start difference. First operand 297 states and 651 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:54,399 INFO L93 Difference]: Finished difference Result 571 states and 1205 transitions. [2021-08-21 13:01:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:01:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:54,401 INFO L225 Difference]: With dead ends: 571 [2021-08-21 13:01:54,401 INFO L226 Difference]: Without dead ends: 539 [2021-08-21 13:01:54,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 1197.7ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:01:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-21 13:01:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 297. [2021-08-21 13:01:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.199324324324324) internal successors, (651), 296 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 13:01:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 651 transitions. [2021-08-21 13:01:54,407 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 651 transitions. Word has length 27 [2021-08-21 13:01:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:54,408 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 651 transitions. [2021-08-21 13:01:54,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 651 transitions. [2021-08-21 13:01:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:54,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:54,408 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:54,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:54,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:54,617 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:54,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:54,617 INFO L82 PathProgramCache]: Analyzing trace with hash -238549261, now seen corresponding path program 34 times [2021-08-21 13:01:54,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:54,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112986094] [2021-08-21 13:01:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:54,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:54,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:54,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112986094] [2021-08-21 13:01:54,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112986094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:54,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024875925] [2021-08-21 13:01:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:54,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:54,848 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:54,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 13:01:56,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:01:56,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:01:56,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024875925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:57,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:57,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:01:57,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476402514] [2021-08-21 13:01:57,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:01:57,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:01:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:01:57,326 INFO L87 Difference]: Start difference. First operand 297 states and 651 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:58,296 INFO L93 Difference]: Finished difference Result 629 states and 1349 transitions. [2021-08-21 13:01:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:01:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:01:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:58,298 INFO L225 Difference]: With dead ends: 629 [2021-08-21 13:01:58,298 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 13:01:58,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 956.2ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:01:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 13:01:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 291. [2021-08-21 13:01:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.196551724137931) internal successors, (637), 290 states have internal predecessors, (637), 0 states have call successors, (0), 0 states 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 13:01:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 637 transitions. [2021-08-21 13:01:58,303 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 637 transitions. Word has length 27 [2021-08-21 13:01:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:58,304 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 637 transitions. [2021-08-21 13:01:58,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 637 transitions. [2021-08-21 13:01:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:01:58,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:58,304 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:58,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 13:01:58,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 13:01:58,505 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:01:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash 183791603, now seen corresponding path program 35 times [2021-08-21 13:01:58,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:58,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675334940] [2021-08-21 13:01:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:58,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:58,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:58,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675334940] [2021-08-21 13:01:58,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675334940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:58,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085157577] [2021-08-21 13:01:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:01:58,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:58,718 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:58,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 13:02:00,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:02:00,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:02:00,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:01,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085157577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:01,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-21 13:02:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856437528] [2021-08-21 13:02:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:02:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:02:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:02:01,378 INFO L87 Difference]: Start difference. First operand 291 states and 637 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:02,191 INFO L93 Difference]: Finished difference Result 586 states and 1209 transitions. [2021-08-21 13:02:02,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:02:02,192 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:02,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:02,194 INFO L225 Difference]: With dead ends: 586 [2021-08-21 13:02:02,194 INFO L226 Difference]: Without dead ends: 572 [2021-08-21 13:02:02,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 846.9ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:02:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-21 13:02:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 360. [2021-08-21 13:02:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.2256267409470754) internal successors, (799), 359 states have internal predecessors, (799), 0 states have call successors, (0), 0 states 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 13:02:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 799 transitions. [2021-08-21 13:02:02,199 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 799 transitions. Word has length 27 [2021-08-21 13:02:02,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:02,200 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 799 transitions. [2021-08-21 13:02:02,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 799 transitions. [2021-08-21 13:02:02,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:02,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:02,201 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:02,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 13:02:02,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 13:02:02,417 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:02,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1880365043, now seen corresponding path program 36 times [2021-08-21 13:02:02,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:02,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413697234] [2021-08-21 13:02:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:02,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:02,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:02,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413697234] [2021-08-21 13:02:02,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413697234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:02,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132632076] [2021-08-21 13:02:02,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:02:02,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:02,619 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:02,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 13:02:04,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:02:04,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:04,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:02:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:05,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132632076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:05,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:05,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:02:05,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386797060] [2021-08-21 13:02:05,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:02:05,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:02:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:02:05,270 INFO L87 Difference]: Start difference. First operand 360 states and 799 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:06,847 INFO L93 Difference]: Finished difference Result 658 states and 1370 transitions. [2021-08-21 13:02:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 13:02:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:06,850 INFO L225 Difference]: With dead ends: 658 [2021-08-21 13:02:06,850 INFO L226 Difference]: Without dead ends: 638 [2021-08-21 13:02:06,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1408.2ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 13:02:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-21 13:02:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 354. [2021-08-21 13:02:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.223796033994334) internal successors, (785), 353 states have internal predecessors, (785), 0 states have call successors, (0), 0 states 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 13:02:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 785 transitions. [2021-08-21 13:02:06,859 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 785 transitions. Word has length 27 [2021-08-21 13:02:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:06,859 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 785 transitions. [2021-08-21 13:02:06,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 785 transitions. [2021-08-21 13:02:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:06,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:06,860 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:06,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 13:02:07,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 13:02:07,069 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash 723254831, now seen corresponding path program 37 times [2021-08-21 13:02:07,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:07,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236074309] [2021-08-21 13:02:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:07,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:07,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236074309] [2021-08-21 13:02:07,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236074309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041535908] [2021-08-21 13:02:07,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:02:07,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:07,285 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:07,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 13:02:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:09,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:02:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:09,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041535908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:09,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:09,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-21 13:02:09,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965976168] [2021-08-21 13:02:09,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:02:09,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:02:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:02:09,926 INFO L87 Difference]: Start difference. First operand 354 states and 785 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:11,283 INFO L93 Difference]: Finished difference Result 688 states and 1439 transitions. [2021-08-21 13:02:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 13:02:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:11,285 INFO L225 Difference]: With dead ends: 688 [2021-08-21 13:02:11,285 INFO L226 Difference]: Without dead ends: 652 [2021-08-21 13:02:11,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1228.0ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:02:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-21 13:02:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 358. [2021-08-21 13:02:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.2212885154061626) internal successors, (793), 357 states have internal predecessors, (793), 0 states have call successors, (0), 0 states 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 13:02:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 793 transitions. [2021-08-21 13:02:11,291 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 793 transitions. Word has length 27 [2021-08-21 13:02:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:11,291 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 793 transitions. [2021-08-21 13:02:11,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 793 transitions. [2021-08-21 13:02:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:11,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:11,292 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:11,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:11,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 13:02:11,494 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash -45150409, now seen corresponding path program 38 times [2021-08-21 13:02:11,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:11,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006608136] [2021-08-21 13:02:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:11,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:11,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:11,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006608136] [2021-08-21 13:02:11,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006608136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:11,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34776908] [2021-08-21 13:02:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:02:11,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:11,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:11,704 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:11,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 13:02:13,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:02:13,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:02:13,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:14,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34776908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:14,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:14,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-21 13:02:14,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678192978] [2021-08-21 13:02:14,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:02:14,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:02:14,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:02:14,455 INFO L87 Difference]: Start difference. First operand 358 states and 793 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:15,162 INFO L93 Difference]: Finished difference Result 640 states and 1341 transitions. [2021-08-21 13:02:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:02:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:15,164 INFO L225 Difference]: With dead ends: 640 [2021-08-21 13:02:15,164 INFO L226 Difference]: Without dead ends: 626 [2021-08-21 13:02:15,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:02:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-08-21 13:02:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 440. [2021-08-21 13:02:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2391799544419135) internal successors, (983), 439 states have internal predecessors, (983), 0 states have call successors, (0), 0 states 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 13:02:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 983 transitions. [2021-08-21 13:02:15,171 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 983 transitions. Word has length 27 [2021-08-21 13:02:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:15,171 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 983 transitions. [2021-08-21 13:02:15,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 983 transitions. [2021-08-21 13:02:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:15,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:15,173 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:15,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:15,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 13:02:15,385 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1651423031, now seen corresponding path program 39 times [2021-08-21 13:02:15,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:15,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273912291] [2021-08-21 13:02:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:15,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:15,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:15,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273912291] [2021-08-21 13:02:15,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273912291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:15,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767407650] [2021-08-21 13:02:15,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:02:15,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:15,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:15,624 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:15,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 13:02:17,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:02:17,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:17,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 13:02:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:18,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767407650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:18,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:18,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-21 13:02:18,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472301280] [2021-08-21 13:02:18,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:02:18,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:02:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:02:18,405 INFO L87 Difference]: Start difference. First operand 440 states and 983 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:19,796 INFO L93 Difference]: Finished difference Result 725 states and 1540 transitions. [2021-08-21 13:02:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:02:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:19,798 INFO L225 Difference]: With dead ends: 725 [2021-08-21 13:02:19,798 INFO L226 Difference]: Without dead ends: 705 [2021-08-21 13:02:19,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1220.8ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:02:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-08-21 13:02:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 379. [2021-08-21 13:02:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2248677248677247) internal successors, (841), 378 states have internal predecessors, (841), 0 states have call successors, (0), 0 states 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 13:02:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 841 transitions. [2021-08-21 13:02:19,804 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 841 transitions. Word has length 27 [2021-08-21 13:02:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:19,804 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 841 transitions. [2021-08-21 13:02:19,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 841 transitions. [2021-08-21 13:02:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:19,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:19,805 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:19,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 13:02:20,021 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1716949619, now seen corresponding path program 40 times [2021-08-21 13:02:20,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:20,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522887079] [2021-08-21 13:02:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:20,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:20,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:20,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522887079] [2021-08-21 13:02:20,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522887079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:20,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264216905] [2021-08-21 13:02:20,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:02:20,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:20,249 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:20,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 13:02:22,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:02:22,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:02:22,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264216905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:23,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-21 13:02:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873182052] [2021-08-21 13:02:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:02:23,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:02:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:02:23,113 INFO L87 Difference]: Start difference. First operand 379 states and 841 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:23,730 INFO L93 Difference]: Finished difference Result 659 states and 1361 transitions. [2021-08-21 13:02:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:02:23,730 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:23,732 INFO L225 Difference]: With dead ends: 659 [2021-08-21 13:02:23,732 INFO L226 Difference]: Without dead ends: 645 [2021-08-21 13:02:23,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:02:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-08-21 13:02:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 451. [2021-08-21 13:02:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.2644444444444445) internal successors, (1019), 450 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states 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 13:02:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1019 transitions. [2021-08-21 13:02:23,742 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1019 transitions. Word has length 27 [2021-08-21 13:02:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:23,742 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 1019 transitions. [2021-08-21 13:02:23,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1019 transitions. [2021-08-21 13:02:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:23,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:23,744 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:23,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 13:02:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 13:02:23,957 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:23,957 INFO L82 PathProgramCache]: Analyzing trace with hash 36452979, now seen corresponding path program 41 times [2021-08-21 13:02:23,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:23,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802477493] [2021-08-21 13:02:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:23,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:24,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:24,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802477493] [2021-08-21 13:02:24,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802477493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:24,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314751879] [2021-08-21 13:02:24,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:02:24,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:24,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:24,185 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:24,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 13:02:26,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:02:26,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:02:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:27,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314751879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:27,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:27,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-21 13:02:27,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846469591] [2021-08-21 13:02:27,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:02:27,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:27,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:02:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:02:27,082 INFO L87 Difference]: Start difference. First operand 451 states and 1019 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:28,274 INFO L93 Difference]: Finished difference Result 757 states and 1589 transitions. [2021-08-21 13:02:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:02:28,275 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:28,278 INFO L225 Difference]: With dead ends: 757 [2021-08-21 13:02:28,278 INFO L226 Difference]: Without dead ends: 743 [2021-08-21 13:02:28,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1140.2ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:02:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-08-21 13:02:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 452. [2021-08-21 13:02:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.2749445676274944) internal successors, (1026), 451 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 13:02:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1026 transitions. [2021-08-21 13:02:28,287 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1026 transitions. Word has length 27 [2021-08-21 13:02:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:28,288 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1026 transitions. [2021-08-21 13:02:28,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1026 transitions. [2021-08-21 13:02:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:28,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:28,289 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:28,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:28,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 13:02:28,509 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1733026419, now seen corresponding path program 42 times [2021-08-21 13:02:28,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:28,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789559850] [2021-08-21 13:02:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:28,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:28,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:28,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789559850] [2021-08-21 13:02:28,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789559850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:28,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87547007] [2021-08-21 13:02:28,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:02:28,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:28,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:28,770 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:28,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 13:02:31,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:02:31,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:02:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:31,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87547007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:31,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:31,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-21 13:02:31,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537309846] [2021-08-21 13:02:31,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:02:31,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:02:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:02:31,670 INFO L87 Difference]: Start difference. First operand 452 states and 1026 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:33,410 INFO L93 Difference]: Finished difference Result 787 states and 1669 transitions. [2021-08-21 13:02:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 13:02:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:33,413 INFO L225 Difference]: With dead ends: 787 [2021-08-21 13:02:33,413 INFO L226 Difference]: Without dead ends: 751 [2021-08-21 13:02:33,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 1536.7ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 13:02:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-21 13:02:33,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 445. [2021-08-21 13:02:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.259009009009009) internal successors, (1003), 444 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states 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 13:02:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1003 transitions. [2021-08-21 13:02:33,423 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1003 transitions. Word has length 27 [2021-08-21 13:02:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:33,424 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1003 transitions. [2021-08-21 13:02:33,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1003 transitions. [2021-08-21 13:02:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:33,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:33,425 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:33,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:33,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:33,629 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash 989532139, now seen corresponding path program 43 times [2021-08-21 13:02:33,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:33,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909829582] [2021-08-21 13:02:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:33,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:33,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:33,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909829582] [2021-08-21 13:02:33,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909829582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:33,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096506717] [2021-08-21 13:02:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:02:33,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:33,884 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:33,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 13:02:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:36,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:02:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096506717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:36,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:36,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-21 13:02:36,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69544832] [2021-08-21 13:02:36,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:02:36,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:02:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:02:36,856 INFO L87 Difference]: Start difference. First operand 445 states and 1003 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:37,651 INFO L93 Difference]: Finished difference Result 743 states and 1560 transitions. [2021-08-21 13:02:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:02:37,652 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:37,654 INFO L225 Difference]: With dead ends: 743 [2021-08-21 13:02:37,654 INFO L226 Difference]: Without dead ends: 717 [2021-08-21 13:02:37,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 789.1ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:02:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-08-21 13:02:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 484. [2021-08-21 13:02:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.2546583850931676) internal successors, (1089), 483 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states 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 13:02:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1089 transitions. [2021-08-21 13:02:37,661 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1089 transitions. Word has length 27 [2021-08-21 13:02:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:37,662 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1089 transitions. [2021-08-21 13:02:37,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1089 transitions. [2021-08-21 13:02:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 13:02:37,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:37,663 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:37,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 13:02:37,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:37,877 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash -342558545, now seen corresponding path program 44 times [2021-08-21 13:02:37,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:37,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403806343] [2021-08-21 13:02:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:37,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:38,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:38,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403806343] [2021-08-21 13:02:38,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403806343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:38,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796807134] [2021-08-21 13:02:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:02:38,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:38,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:38,161 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:38,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 13:02:40,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:02:40,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:02:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:41,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796807134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:41,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:41,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-21 13:02:41,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58763588] [2021-08-21 13:02:41,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 13:02:41,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 13:02:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:02:41,201 INFO L87 Difference]: Start difference. First operand 484 states and 1089 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:42,443 INFO L93 Difference]: Finished difference Result 813 states and 1766 transitions. [2021-08-21 13:02:42,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:02:42,444 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 13:02:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:42,446 INFO L225 Difference]: With dead ends: 813 [2021-08-21 13:02:42,446 INFO L226 Difference]: Without dead ends: 777 [2021-08-21 13:02:42,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1125.0ms TimeCoverageRelationStatistics Valid=542, Invalid=2998, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:02:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-08-21 13:02:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 431. [2021-08-21 13:02:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.2488372093023257) internal successors, (967), 430 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 967 transitions. [2021-08-21 13:02:42,453 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 967 transitions. Word has length 27 [2021-08-21 13:02:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:42,454 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 967 transitions. [2021-08-21 13:02:42,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 967 transitions. [2021-08-21 13:02:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:02:42,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:42,454 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:42,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 13:02:42,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 13:02:42,655 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash -836906575, now seen corresponding path program 45 times [2021-08-21 13:02:42,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:42,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103926109] [2021-08-21 13:02:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:42,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:02:42,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:42,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103926109] [2021-08-21 13:02:42,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103926109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:42,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878890973] [2021-08-21 13:02:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:02:42,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:42,981 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:43,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 13:02:45,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:02:45,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:45,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:02:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:46,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878890973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:46,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:46,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-21 13:02:46,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341756108] [2021-08-21 13:02:46,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:02:46,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:02:46,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:02:46,291 INFO L87 Difference]: Start difference. First operand 431 states and 967 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:47,119 INFO L93 Difference]: Finished difference Result 597 states and 1282 transitions. [2021-08-21 13:02:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:02:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:02:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:47,121 INFO L225 Difference]: With dead ends: 597 [2021-08-21 13:02:47,121 INFO L226 Difference]: Without dead ends: 523 [2021-08-21 13:02:47,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 963.1ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:02:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-21 13:02:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 478. [2021-08-21 13:02:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.19706498951782) internal successors, (1048), 477 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 13:02:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1048 transitions. [2021-08-21 13:02:47,127 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1048 transitions. Word has length 29 [2021-08-21 13:02:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:47,127 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1048 transitions. [2021-08-21 13:02:47,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1048 transitions. [2021-08-21 13:02:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:02:47,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:47,128 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:47,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 13:02:47,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 13:02:47,338 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:47,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1394843693, now seen corresponding path program 46 times [2021-08-21 13:02:47,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:47,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988857298] [2021-08-21 13:02:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:47,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:47,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:47,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988857298] [2021-08-21 13:02:47,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988857298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:47,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997743720] [2021-08-21 13:02:47,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:02:47,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:47,641 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:47,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 13:02:50,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:02:50,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:50,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:02:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:51,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997743720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:51,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:51,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-21 13:02:51,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89359262] [2021-08-21 13:02:51,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:02:51,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:02:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:02:51,002 INFO L87 Difference]: Start difference. First operand 478 states and 1048 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:51,992 INFO L93 Difference]: Finished difference Result 568 states and 1202 transitions. [2021-08-21 13:02:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:02:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:02:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:51,994 INFO L225 Difference]: With dead ends: 568 [2021-08-21 13:02:51,994 INFO L226 Difference]: Without dead ends: 544 [2021-08-21 13:02:51,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1157.5ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:02:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-21 13:02:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 481. [2021-08-21 13:02:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.19375) internal successors, (1053), 480 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 13:02:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1053 transitions. [2021-08-21 13:02:52,000 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1053 transitions. Word has length 29 [2021-08-21 13:02:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:52,000 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1053 transitions. [2021-08-21 13:02:52,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1053 transitions. [2021-08-21 13:02:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:02:52,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:52,001 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:52,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 13:02:52,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 13:02:52,201 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash -820829775, now seen corresponding path program 47 times [2021-08-21 13:02:52,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:52,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757567216] [2021-08-21 13:02:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:52,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:02:52,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:52,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757567216] [2021-08-21 13:02:52,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757567216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:52,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733511481] [2021-08-21 13:02:52,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:02:52,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:52,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:52,493 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:52,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 13:02:55,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:02:55,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:02:55,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:02:55,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:02:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:02:55,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733511481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:55,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:02:55,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-21 13:02:55,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752176267] [2021-08-21 13:02:55,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 13:02:55,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:02:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 13:02:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:02:55,831 INFO L87 Difference]: Start difference. First operand 481 states and 1053 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:57,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:02:57,139 INFO L93 Difference]: Finished difference Result 602 states and 1271 transitions. [2021-08-21 13:02:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:02:57,139 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:02:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:02:57,141 INFO L225 Difference]: With dead ends: 602 [2021-08-21 13:02:57,141 INFO L226 Difference]: Without dead ends: 576 [2021-08-21 13:02:57,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1371.8ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:02:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-08-21 13:02:57,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 463. [2021-08-21 13:02:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.2012987012987013) internal successors, (1017), 462 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states 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 13:02:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1017 transitions. [2021-08-21 13:02:57,148 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1017 transitions. Word has length 29 [2021-08-21 13:02:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:02:57,148 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1017 transitions. [2021-08-21 13:02:57,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:02:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1017 transitions. [2021-08-21 13:02:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:02:57,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:02:57,150 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:02:57,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 13:02:57,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:57,350 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:02:57,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:02:57,350 INFO L82 PathProgramCache]: Analyzing trace with hash -783308743, now seen corresponding path program 48 times [2021-08-21 13:02:57,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:02:57,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99691364] [2021-08-21 13:02:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:02:57,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:02:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:02:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:02:57,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:02:57,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99691364] [2021-08-21 13:02:57,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99691364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:02:57,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110198772] [2021-08-21 13:02:57,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:02:57,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:02:57,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:02:57,659 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:02:57,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 13:03:00,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:03:00,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:00,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:03:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:01,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110198772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:01,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:01,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:03:01,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442151026] [2021-08-21 13:03:01,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:03:01,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:03:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:01,040 INFO L87 Difference]: Start difference. First operand 463 states and 1017 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:01,919 INFO L93 Difference]: Finished difference Result 659 states and 1394 transitions. [2021-08-21 13:03:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:03:01,919 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) Word has length 29 [2021-08-21 13:03:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:01,921 INFO L225 Difference]: With dead ends: 659 [2021-08-21 13:03:01,921 INFO L226 Difference]: Without dead ends: 605 [2021-08-21 13:03:01,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 987.2ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:03:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-21 13:03:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 503. [2021-08-21 13:03:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.189243027888446) internal successors, (1099), 502 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states 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 13:03:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1099 transitions. [2021-08-21 13:03:01,929 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1099 transitions. Word has length 29 [2021-08-21 13:03:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:01,929 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1099 transitions. [2021-08-21 13:03:01,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1099 transitions. [2021-08-21 13:03:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:01,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:01,931 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:01,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:02,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 13:03:02,145 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1398873781, now seen corresponding path program 49 times [2021-08-21 13:03:02,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:02,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228515969] [2021-08-21 13:03:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:02,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:03:02,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:02,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228515969] [2021-08-21 13:03:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228515969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:02,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826391117] [2021-08-21 13:03:02,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:03:02,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:02,405 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:02,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 13:03:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:05,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:03:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:05,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826391117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:05,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:05,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:03:05,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172735028] [2021-08-21 13:03:05,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:03:05,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:03:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:05,819 INFO L87 Difference]: Start difference. First operand 503 states and 1099 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:07,023 INFO L93 Difference]: Finished difference Result 665 states and 1402 transitions. [2021-08-21 13:03:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:03:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) Word has length 29 [2021-08-21 13:03:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:07,026 INFO L225 Difference]: With dead ends: 665 [2021-08-21 13:03:07,026 INFO L226 Difference]: Without dead ends: 643 [2021-08-21 13:03:07,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1228.6ms TimeCoverageRelationStatistics Valid=514, Invalid=3392, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:03:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-08-21 13:03:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 504. [2021-08-21 13:03:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.1868787276341948) internal successors, (1100), 503 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states 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 13:03:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1100 transitions. [2021-08-21 13:03:07,034 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1100 transitions. Word has length 29 [2021-08-21 13:03:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:07,034 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1100 transitions. [2021-08-21 13:03:07,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1100 transitions. [2021-08-21 13:03:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:07,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:07,035 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:07,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:07,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:07,236 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash -816799687, now seen corresponding path program 50 times [2021-08-21 13:03:07,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:07,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182166604] [2021-08-21 13:03:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:07,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:03:07,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:07,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182166604] [2021-08-21 13:03:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182166604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:07,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983984016] [2021-08-21 13:03:07,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:03:07,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:07,593 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:07,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 13:03:10,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:03:10,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:10,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:03:10,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:11,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983984016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:11,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:11,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:03:11,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133444443] [2021-08-21 13:03:11,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:03:11,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:11,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:03:11,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:11,111 INFO L87 Difference]: Start difference. First operand 504 states and 1100 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:12,564 INFO L93 Difference]: Finished difference Result 708 states and 1488 transitions. [2021-08-21 13:03:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 13:03:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) Word has length 29 [2021-08-21 13:03:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:12,566 INFO L225 Difference]: With dead ends: 708 [2021-08-21 13:03:12,566 INFO L226 Difference]: Without dead ends: 682 [2021-08-21 13:03:12,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1476.3ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 13:03:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-21 13:03:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 485. [2021-08-21 13:03:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.18801652892562) internal successors, (1059), 484 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states 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 13:03:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1059 transitions. [2021-08-21 13:03:12,576 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1059 transitions. Word has length 29 [2021-08-21 13:03:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:12,576 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1059 transitions. [2021-08-21 13:03:12,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1059 transitions. [2021-08-21 13:03:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:12,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:12,577 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:12,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:12,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 13:03:12,781 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash -454850335, now seen corresponding path program 51 times [2021-08-21 13:03:12,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:12,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303484540] [2021-08-21 13:03:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:12,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:13,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:13,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303484540] [2021-08-21 13:03:13,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303484540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:13,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156935248] [2021-08-21 13:03:13,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:03:13,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:13,077 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:13,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 13:03:15,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:03:15,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:03:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:16,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156935248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:16,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:16,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-21 13:03:16,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77452223] [2021-08-21 13:03:16,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:03:16,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:03:16,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:03:16,750 INFO L87 Difference]: Start difference. First operand 485 states and 1059 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:17,641 INFO L93 Difference]: Finished difference Result 694 states and 1464 transitions. [2021-08-21 13:03:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:03:17,641 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:03:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:17,642 INFO L225 Difference]: With dead ends: 694 [2021-08-21 13:03:17,643 INFO L226 Difference]: Without dead ends: 617 [2021-08-21 13:03:17,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 991.6ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:03:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-21 13:03:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 501. [2021-08-21 13:03:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.182) internal successors, (1091), 500 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states 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 13:03:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1091 transitions. [2021-08-21 13:03:17,649 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1091 transitions. Word has length 29 [2021-08-21 13:03:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:17,649 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1091 transitions. [2021-08-21 13:03:17,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1091 transitions. [2021-08-21 13:03:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:17,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:17,650 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:17,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:17,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 13:03:17,850 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1947308465, now seen corresponding path program 52 times [2021-08-21 13:03:17,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:17,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759259876] [2021-08-21 13:03:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:17,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:03:18,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:18,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759259876] [2021-08-21 13:03:18,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759259876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:18,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284378818] [2021-08-21 13:03:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:03:18,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:18,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:18,097 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:18,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 13:03:20,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:03:20,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:20,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:03:20,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:21,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284378818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:21,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:21,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:03:21,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741320347] [2021-08-21 13:03:21,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:03:21,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:03:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:21,684 INFO L87 Difference]: Start difference. First operand 501 states and 1091 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:22,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:22,750 INFO L93 Difference]: Finished difference Result 724 states and 1537 transitions. [2021-08-21 13:03:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:03:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:03:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:22,752 INFO L225 Difference]: With dead ends: 724 [2021-08-21 13:03:22,752 INFO L226 Difference]: Without dead ends: 672 [2021-08-21 13:03:22,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1067.4ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:03:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-21 13:03:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 585. [2021-08-21 13:03:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1780821917808217) internal successors, (1272), 584 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 13:03:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1272 transitions. [2021-08-21 13:03:22,760 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1272 transitions. Word has length 29 [2021-08-21 13:03:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:22,760 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1272 transitions. [2021-08-21 13:03:22,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1272 transitions. [2021-08-21 13:03:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:22,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:22,761 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:22,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:22,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:22,973 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -115908563, now seen corresponding path program 53 times [2021-08-21 13:03:22,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:22,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261920654] [2021-08-21 13:03:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:22,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:23,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:23,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261920654] [2021-08-21 13:03:23,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261920654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:23,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520877423] [2021-08-21 13:03:23,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:03:23,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:23,223 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:23,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 13:03:26,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:03:26,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:26,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:03:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:26,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520877423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:26,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:26,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:03:26,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392210926] [2021-08-21 13:03:26,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:03:26,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:03:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:26,828 INFO L87 Difference]: Start difference. First operand 585 states and 1272 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:28,183 INFO L93 Difference]: Finished difference Result 750 states and 1578 transitions. [2021-08-21 13:03:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 13:03:28,183 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:03:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:28,185 INFO L225 Difference]: With dead ends: 750 [2021-08-21 13:03:28,185 INFO L226 Difference]: Without dead ends: 726 [2021-08-21 13:03:28,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1375.2ms TimeCoverageRelationStatistics Valid=612, Invalid=4080, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 13:03:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-08-21 13:03:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 586. [2021-08-21 13:03:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1709401709401708) internal successors, (1270), 585 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states 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 13:03:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1270 transitions. [2021-08-21 13:03:28,191 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1270 transitions. Word has length 29 [2021-08-21 13:03:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:28,192 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1270 transitions. [2021-08-21 13:03:28,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1270 transitions. [2021-08-21 13:03:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:28,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:28,192 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:28,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 13:03:28,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 13:03:28,393 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1963385265, now seen corresponding path program 54 times [2021-08-21 13:03:28,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:28,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270325015] [2021-08-21 13:03:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:28,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:03:28,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:28,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270325015] [2021-08-21 13:03:28,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270325015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:28,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231900972] [2021-08-21 13:03:28,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:03:28,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:28,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:28,648 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:28,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 13:03:31,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:03:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:31,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:03:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:32,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231900972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:32,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:32,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:03:32,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960299905] [2021-08-21 13:03:32,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:03:32,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:32,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:03:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:32,447 INFO L87 Difference]: Start difference. First operand 586 states and 1270 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:34,259 INFO L93 Difference]: Finished difference Result 803 states and 1683 transitions. [2021-08-21 13:03:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 13:03:34,260 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:03:34,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:34,261 INFO L225 Difference]: With dead ends: 803 [2021-08-21 13:03:34,261 INFO L226 Difference]: Without dead ends: 777 [2021-08-21 13:03:34,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1688.1ms TimeCoverageRelationStatistics Valid=810, Invalid=4592, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 13:03:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-08-21 13:03:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 567. [2021-08-21 13:03:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.1607773851590104) internal successors, (1223), 566 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states 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 13:03:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1223 transitions. [2021-08-21 13:03:34,268 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1223 transitions. Word has length 29 [2021-08-21 13:03:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:34,268 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1223 transitions. [2021-08-21 13:03:34,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1223 transitions. [2021-08-21 13:03:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:34,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:34,269 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:34,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:34,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 13:03:34,470 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:34,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1115782371, now seen corresponding path program 55 times [2021-08-21 13:03:34,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:34,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203887698] [2021-08-21 13:03:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:34,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:34,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203887698] [2021-08-21 13:03:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203887698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283867862] [2021-08-21 13:03:34,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:03:34,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:34,765 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:34,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 13:03:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:37,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:03:37,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:38,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283867862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:38,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:38,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-21 13:03:38,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397377960] [2021-08-21 13:03:38,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:03:38,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:03:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:03:38,797 INFO L87 Difference]: Start difference. First operand 567 states and 1223 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:39,610 INFO L93 Difference]: Finished difference Result 727 states and 1532 transitions. [2021-08-21 13:03:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:03:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:03:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:39,612 INFO L225 Difference]: With dead ends: 727 [2021-08-21 13:03:39,612 INFO L226 Difference]: Without dead ends: 705 [2021-08-21 13:03:39,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 912.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:03:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-08-21 13:03:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 592. [2021-08-21 13:03:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.1573604060913705) internal successors, (1275), 591 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 13:03:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1275 transitions. [2021-08-21 13:03:39,620 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1275 transitions. Word has length 29 [2021-08-21 13:03:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:39,620 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1275 transitions. [2021-08-21 13:03:39,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1275 transitions. [2021-08-21 13:03:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:39,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:39,622 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:39,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:39,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:39,845 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:39,845 INFO L82 PathProgramCache]: Analyzing trace with hash 963511457, now seen corresponding path program 56 times [2021-08-21 13:03:39,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:39,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405332481] [2021-08-21 13:03:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:39,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:40,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:40,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405332481] [2021-08-21 13:03:40,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405332481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:40,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716749513] [2021-08-21 13:03:40,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:03:40,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:40,149 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:40,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 13:03:43,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:03:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 13:03:43,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:44,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716749513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:44,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:44,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-21 13:03:44,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383934992] [2021-08-21 13:03:44,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:03:44,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:44,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:03:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:03:44,278 INFO L87 Difference]: Start difference. First operand 592 states and 1275 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:45,212 INFO L93 Difference]: Finished difference Result 850 states and 1794 transitions. [2021-08-21 13:03:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:03:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:03:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:45,213 INFO L225 Difference]: With dead ends: 850 [2021-08-21 13:03:45,213 INFO L226 Difference]: Without dead ends: 817 [2021-08-21 13:03:45,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1010.9ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:03:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-08-21 13:03:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 591. [2021-08-21 13:03:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.1576271186440676) internal successors, (1273), 590 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states 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 13:03:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1273 transitions. [2021-08-21 13:03:45,221 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1273 transitions. Word has length 29 [2021-08-21 13:03:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:45,221 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1273 transitions. [2021-08-21 13:03:45,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1273 transitions. [2021-08-21 13:03:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:45,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:45,223 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:45,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:45,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:45,437 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash -112199699, now seen corresponding path program 57 times [2021-08-21 13:03:45,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:45,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904724805] [2021-08-21 13:03:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:45,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:45,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:45,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904724805] [2021-08-21 13:03:45,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904724805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:45,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129282826] [2021-08-21 13:03:45,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:03:45,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:45,813 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:45,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 13:03:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:03:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:03:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129282826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:50,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:50,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-21 13:03:50,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839479924] [2021-08-21 13:03:50,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:03:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:03:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:03:50,156 INFO L87 Difference]: Start difference. First operand 591 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:51,421 INFO L93 Difference]: Finished difference Result 1023 states and 2130 transitions. [2021-08-21 13:03:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:03:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:03:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:51,423 INFO L225 Difference]: With dead ends: 1023 [2021-08-21 13:03:51,423 INFO L226 Difference]: Without dead ends: 976 [2021-08-21 13:03:51,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1267.1ms TimeCoverageRelationStatistics Valid=434, Invalid=2872, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:03:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-21 13:03:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 607. [2021-08-21 13:03:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.1617161716171616) internal successors, (1310), 606 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states 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 13:03:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1310 transitions. [2021-08-21 13:03:51,431 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1310 transitions. Word has length 29 [2021-08-21 13:03:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:51,431 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1310 transitions. [2021-08-21 13:03:51,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:03:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1310 transitions. [2021-08-21 13:03:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:51,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:51,432 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:51,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 13:03:51,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:51,632 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1093730631, now seen corresponding path program 58 times [2021-08-21 13:03:51,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:51,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913792075] [2021-08-21 13:03:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:51,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:03:51,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:51,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913792075] [2021-08-21 13:03:51,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913792075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:51,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918198455] [2021-08-21 13:03:51,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:03:51,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:51,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:51,893 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:51,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 13:03:55,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:03:55,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:03:55,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:03:55,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:03:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:03:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918198455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:55,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:03:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:03:55,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614392320] [2021-08-21 13:03:55,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:03:55,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:03:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:03:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:03:55,911 INFO L87 Difference]: Start difference. First operand 607 states and 1310 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:03:56,700 INFO L93 Difference]: Finished difference Result 679 states and 1433 transitions. [2021-08-21 13:03:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:03:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) Word has length 29 [2021-08-21 13:03:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:03:56,702 INFO L225 Difference]: With dead ends: 679 [2021-08-21 13:03:56,702 INFO L226 Difference]: Without dead ends: 611 [2021-08-21 13:03:56,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 983.2ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:03:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-08-21 13:03:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 580. [2021-08-21 13:03:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.01727115716753) internal successors, (1168), 579 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states 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 13:03:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1168 transitions. [2021-08-21 13:03:56,709 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1168 transitions. Word has length 29 [2021-08-21 13:03:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:03:56,710 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1168 transitions. [2021-08-21 13:03:56,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:03:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1168 transitions. [2021-08-21 13:03:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:03:56,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:03:56,710 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:03:56,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 13:03:56,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 13:03:56,911 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:03:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:03:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1088451893, now seen corresponding path program 59 times [2021-08-21 13:03:56,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:03:56,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256901373] [2021-08-21 13:03:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:03:56,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:03:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:03:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:03:57,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:03:57,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256901373] [2021-08-21 13:03:57,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256901373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:03:57,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401095244] [2021-08-21 13:03:57,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:03:57,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:03:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:03:57,249 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:03:57,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 13:04:00,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:04:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:04:00,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:04:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:01,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401095244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:01,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:01,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:04:01,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650827245] [2021-08-21 13:04:01,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:04:01,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:04:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:04:01,353 INFO L87 Difference]: Start difference. First operand 580 states and 1168 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:04:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:02,606 INFO L93 Difference]: Finished difference Result 708 states and 1416 transitions. [2021-08-21 13:04:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:04:02,606 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) Word has length 29 [2021-08-21 13:04:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:02,607 INFO L225 Difference]: With dead ends: 708 [2021-08-21 13:04:02,607 INFO L226 Difference]: Without dead ends: 684 [2021-08-21 13:04:02,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1366.3ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 13:04:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-21 13:04:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 588. [2021-08-21 13:04:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0034071550255534) internal successors, (1176), 587 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 13:04:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1176 transitions. [2021-08-21 13:04:02,615 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1176 transitions. Word has length 29 [2021-08-21 13:04:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:02,615 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1176 transitions. [2021-08-21 13:04:02,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:04:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1176 transitions. [2021-08-21 13:04:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:04:02,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:04:02,616 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:04:02,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 13:04:02,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 13:04:02,821 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:04:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:04:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1127221575, now seen corresponding path program 60 times [2021-08-21 13:04:02,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:04:02,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643248922] [2021-08-21 13:04:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:04:02,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:04:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 13:04:03,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:04:03,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643248922] [2021-08-21 13:04:03,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643248922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:03,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949908062] [2021-08-21 13:04:03,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:04:03,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:03,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:04:03,084 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:04:03,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 13:04:06,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:04:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:04:06,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:04:06,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:07,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949908062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:07,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:07,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-21 13:04:07,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277865492] [2021-08-21 13:04:07,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 13:04:07,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:07,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 13:04:07,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:04:07,242 INFO L87 Difference]: Start difference. First operand 588 states and 1176 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:04:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:08,737 INFO L93 Difference]: Finished difference Result 764 states and 1518 transitions. [2021-08-21 13:04:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:04:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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) Word has length 29 [2021-08-21 13:04:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:08,738 INFO L225 Difference]: With dead ends: 764 [2021-08-21 13:04:08,738 INFO L226 Difference]: Without dead ends: 738 [2021-08-21 13:04:08,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1463.6ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:04:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-08-21 13:04:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 454. [2021-08-21 13:04:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.988962472406181) internal successors, (901), 453 states have internal predecessors, (901), 0 states have call successors, (0), 0 states 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 13:04:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 901 transitions. [2021-08-21 13:04:08,746 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 901 transitions. Word has length 29 [2021-08-21 13:04:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:08,746 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 901 transitions. [2021-08-21 13:04:08,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 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 13:04:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 901 transitions. [2021-08-21 13:04:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:04:08,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:04:08,747 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:04:08,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 13:04:08,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 13:04:08,947 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:04:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:04:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash -765272223, now seen corresponding path program 61 times [2021-08-21 13:04:08,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:04:08,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319659199] [2021-08-21 13:04:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:04:08,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:04:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:04:09,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:04:09,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319659199] [2021-08-21 13:04:09,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319659199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:09,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949502441] [2021-08-21 13:04:09,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:04:09,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:09,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:04:09,193 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:04:09,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 13:04:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:12,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:04:12,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:13,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949502441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:13,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:13,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-21 13:04:13,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124967030] [2021-08-21 13:04:13,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:04:13,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:04:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:04:13,441 INFO L87 Difference]: Start difference. First operand 454 states and 901 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:14,298 INFO L93 Difference]: Finished difference Result 701 states and 1384 transitions. [2021-08-21 13:04:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:04:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:04:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:14,300 INFO L225 Difference]: With dead ends: 701 [2021-08-21 13:04:14,300 INFO L226 Difference]: Without dead ends: 676 [2021-08-21 13:04:14,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:04:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-21 13:04:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 512. [2021-08-21 13:04:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.990215264187867) internal successors, (1017), 511 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states 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 13:04:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1017 transitions. [2021-08-21 13:04:14,309 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1017 transitions. Word has length 29 [2021-08-21 13:04:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:14,309 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1017 transitions. [2021-08-21 13:04:14,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1017 transitions. [2021-08-21 13:04:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:04:14,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:04:14,311 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:04:14,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 13:04:14,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:14,535 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:04:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:04:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 110491549, now seen corresponding path program 62 times [2021-08-21 13:04:14,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:04:14,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186299198] [2021-08-21 13:04:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:04:14,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:04:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:14,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:04:14,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186299198] [2021-08-21 13:04:14,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186299198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:14,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659049234] [2021-08-21 13:04:14,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:04:14,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:14,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:04:14,825 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:04:14,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 13:04:18,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:04:18,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:04:18,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:04:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:19,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659049234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:19,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:19,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-21 13:04:19,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435501597] [2021-08-21 13:04:19,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 13:04:19,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 13:04:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:04:19,205 INFO L87 Difference]: Start difference. First operand 512 states and 1017 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:20,206 INFO L93 Difference]: Finished difference Result 731 states and 1449 transitions. [2021-08-21 13:04:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:04:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:04:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:20,207 INFO L225 Difference]: With dead ends: 731 [2021-08-21 13:04:20,207 INFO L226 Difference]: Without dead ends: 702 [2021-08-21 13:04:20,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1103.5ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:04:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-21 13:04:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 317. [2021-08-21 13:04:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.981012658227848) internal successors, (626), 316 states have internal predecessors, (626), 0 states have call successors, (0), 0 states 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 13:04:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 626 transitions. [2021-08-21 13:04:20,212 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 626 transitions. Word has length 29 [2021-08-21 13:04:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:20,212 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 626 transitions. [2021-08-21 13:04:20,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 626 transitions. [2021-08-21 13:04:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 13:04:20,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:04:20,213 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:04:20,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 13:04:20,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:20,423 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 13:04:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:04:20,423 INFO L82 PathProgramCache]: Analyzing trace with hash -859449887, now seen corresponding path program 63 times [2021-08-21 13:04:20,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:04:20,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797610054] [2021-08-21 13:04:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:04:20,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:04:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:04:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:20,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:04:20,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797610054] [2021-08-21 13:04:20,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797610054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:20,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814332977] [2021-08-21 13:04:20,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:04:20,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:04:20,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:04:20,714 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:04:20,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 13:04:24,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:04:24,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:04:24,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 13:04:24,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:04:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:04:25,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814332977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:04:25,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:04:25,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-21 13:04:25,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545816253] [2021-08-21 13:04:25,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 13:04:25,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:04:25,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 13:04:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:04:25,123 INFO L87 Difference]: Start difference. First operand 317 states and 626 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:04:26,187 INFO L93 Difference]: Finished difference Result 382 states and 749 transitions. [2021-08-21 13:04:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:04:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 13:04:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:04:26,188 INFO L225 Difference]: With dead ends: 382 [2021-08-21 13:04:26,188 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 13:04:26,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1131.5ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:04:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 13:04:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 13:04:26,189 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 13:04:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 13:04:26,189 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-08-21 13:04:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:04:26,189 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 13:04:26,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:04:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 13:04:26,189 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 13:04:26,191 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:04:26,192 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:04:26,192 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:04:26,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 13:04:26,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 13:04:26,401 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:04:26,401 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:04:26,402 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:04:26 BasicIcfg [2021-08-21 13:04:26,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:04:26,403 INFO L168 Benchmark]: Toolchain (without parser) took 253891.12 ms. Allocated memory was 167.8 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 148.8 MB in the beginning and 241.4 MB in the end (delta: -92.6 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-21 13:04:26,404 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 167.8 MB. Free memory is still 149.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:04:26,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.23 ms. Allocated memory is still 167.8 MB. Free memory was 148.6 MB in the beginning and 147.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:04:26,405 INFO L168 Benchmark]: Boogie Preprocessor took 17.27 ms. Allocated memory is still 167.8 MB. Free memory was 147.3 MB in the beginning and 146.3 MB in the end (delta: 953.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:04:26,405 INFO L168 Benchmark]: RCFGBuilder took 242.55 ms. Allocated memory is still 167.8 MB. Free memory was 146.2 MB in the beginning and 133.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:04:26,406 INFO L168 Benchmark]: TraceAbstraction took 253589.31 ms. Allocated memory was 167.8 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 133.5 MB in the beginning and 241.4 MB in the end (delta: -107.9 MB). Peak memory consumption was 985.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:04:26,407 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 0.15 ms. Allocated memory is still 167.8 MB. Free memory is still 149.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.23 ms. Allocated memory is still 167.8 MB. Free memory was 148.6 MB in the beginning and 147.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.27 ms. Allocated memory is still 167.8 MB. Free memory was 147.3 MB in the beginning and 146.3 MB in the end (delta: 953.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 242.55 ms. Allocated memory is still 167.8 MB. Free memory was 146.2 MB in the beginning and 133.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 253589.31 ms. Allocated memory was 167.8 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 133.5 MB in the beginning and 241.4 MB in the end (delta: -107.9 MB). Peak memory consumption was 985.1 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: 55]: 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, 34 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 253485.6ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 69.7ms, AutomataDifference: 66659.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1323 SDtfs, 8374 SDslu, 14366 SDs, 0 SdLazy, 47580 SolverSat, 4125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19823.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4275 GetRequests, 866 SyntacticMatches, 86 SemanticMatches, 3323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56996 ImplicationChecksByTransitivity, 66813.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=607occurred in iteration=59, InterpolantAutomatonStates: 2593, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 456.2ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10312 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 192.6ms SsaConstructionTime, 756.7ms SatisfiabilityAnalysisTime, 64592.6ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55207 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 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 13:04:26,444 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...