/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:32:57,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:32:57,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:32:57,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 17:32:57,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 17:32:57,218 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:32:57,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:32:57,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:32:57,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:32:57,219 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:32:57,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:32:57,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:32:57,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:32:57,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:32:57,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:32:57,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:32:57,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:32:57,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:32:57,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:32:57,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:32:57,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:32:57,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:32:57,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:32:57,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:32:57,221 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:32:57,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:32:57,222 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:32:57,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:32:57,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:32:57,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:32:57,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:32:57,612 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:32:57,613 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:32:57,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl [2021-08-21 17:32:57,614 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-3.wvr.bpl' [2021-08-21 17:32:57,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:32:57,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:32:57,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:32:57,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:32:57,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:32:57,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:32:57,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:32:57,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:32:57,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:32:57,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:32:57,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:32:57,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:32:57,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:32:57,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/1) ... [2021-08-21 17:32:57,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:32:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:57,691 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 17:32:57,709 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 17:32:57,720 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:32:57,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:32:57,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:32:57,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:32:57,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:32:57,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:32:57,721 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:32:57,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:32:57,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:32:57,722 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 17:32:57,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:32:57,883 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 17:32:57,884 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 17:32:57,884 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 17:32:57,885 INFO L202 PluginConnector]: Adding new model unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:32:57 BoogieIcfgContainer [2021-08-21 17:32:57,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:32:57,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:32:57,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:32:57,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:32:57,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:57" (1/2) ... [2021-08-21 17:32:57,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0b07a6 and model type unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:32:57, skipping insertion in model container [2021-08-21 17:32:57,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:32:57" (2/2) ... [2021-08-21 17:32:57,890 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.bpl [2021-08-21 17:32:57,893 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:32:57,893 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:32:57,893 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:32:57,893 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:32:57,910 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:32:57,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:32:57,952 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 17:32:57,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:32:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-21 17:32:57,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:57,991 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:57,991 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:57,995 INFO L82 PathProgramCache]: Analyzing trace with hash 951723750, now seen corresponding path program 1 times [2021-08-21 17:32:58,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:58,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666328146] [2021-08-21 17:32:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:58,112 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 17:32:58,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666328146] [2021-08-21 17:32:58,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666328146] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:32:58,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:32:58,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:32:58,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088438306] [2021-08-21 17:32:58,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:32:58,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:32:58,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:32:58,127 INFO L87 Difference]: Start difference. First operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:58,158 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-08-21 17:32:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:32:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-08-21 17:32:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:58,165 INFO L225 Difference]: With dead ends: 22 [2021-08-21 17:32:58,166 INFO L226 Difference]: Without dead ends: 13 [2021-08-21 17:32:58,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:32:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-21 17:32:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-21 17:32:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2021-08-21 17:32:58,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 9 [2021-08-21 17:32:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:58,192 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-08-21 17:32:58,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2021-08-21 17:32:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 17:32:58,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:58,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:32:58,195 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash -573522217, now seen corresponding path program 1 times [2021-08-21 17:32:58,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:58,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539899325] [2021-08-21 17:32:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:58,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:58,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539899325] [2021-08-21 17:32:58,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539899325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:58,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427296807] [2021-08-21 17:32:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:58,273 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 17:32:58,278 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 17:32:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:58,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 17:32:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:58,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427296807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:58,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:58,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-21 17:32:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228473844] [2021-08-21 17:32:58,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:32:58,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:32:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:32:58,367 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:58,395 INFO L93 Difference]: Finished difference Result 15 states and 23 transitions. [2021-08-21 17:32:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:32:58,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 10 [2021-08-21 17:32:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:58,396 INFO L225 Difference]: With dead ends: 15 [2021-08-21 17:32:58,396 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 17:32:58,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:32:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 17:32:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2021-08-21 17:32:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-08-21 17:32:58,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2021-08-21 17:32:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:58,403 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-08-21 17:32:58,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2021-08-21 17:32:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 17:32:58,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:58,405 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:58,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:58,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:58,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -538265817, now seen corresponding path program 1 times [2021-08-21 17:32:58,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:58,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111644704] [2021-08-21 17:32:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:58,654 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 17:32:58,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:58,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111644704] [2021-08-21 17:32:58,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111644704] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:32:58,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:32:58,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:32:58,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64465750] [2021-08-21 17:32:58,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:32:58,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:32:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:32:58,656 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:58,674 INFO L93 Difference]: Finished difference Result 15 states and 22 transitions. [2021-08-21 17:32:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:32:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-21 17:32:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:58,676 INFO L225 Difference]: With dead ends: 15 [2021-08-21 17:32:58,676 INFO L226 Difference]: Without dead ends: 14 [2021-08-21 17:32:58,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:32:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-21 17:32:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-21 17:32:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2021-08-21 17:32:58,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 10 [2021-08-21 17:32:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:58,678 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-08-21 17:32:58,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2021-08-21 17:32:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 17:32:58,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:58,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:58,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:32:58,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:58,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2038357773, now seen corresponding path program 2 times [2021-08-21 17:32:58,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:58,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375837018] [2021-08-21 17:32:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:58,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:58,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375837018] [2021-08-21 17:32:58,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375837018] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:32:58,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:32:58,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:32:58,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299171642] [2021-08-21 17:32:58,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:32:58,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:32:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:32:58,727 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:58,739 INFO L93 Difference]: Finished difference Result 15 states and 23 transitions. [2021-08-21 17:32:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:32:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-21 17:32:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:58,740 INFO L225 Difference]: With dead ends: 15 [2021-08-21 17:32:58,740 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 17:32:58,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:32:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 17:32:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-21 17:32:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2021-08-21 17:32:58,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 10 [2021-08-21 17:32:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:58,742 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2021-08-21 17:32:58,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2021-08-21 17:32:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:32:58,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:58,743 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:58,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:32:58,743 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash -576250538, now seen corresponding path program 1 times [2021-08-21 17:32:58,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:58,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438893007] [2021-08-21 17:32:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:58,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:58,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438893007] [2021-08-21 17:32:58,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438893007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:58,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903673583] [2021-08-21 17:32:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:58,788 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 17:32:58,793 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 17:32:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:32:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:58,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903673583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:58,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:58,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 17:32:58,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358133007] [2021-08-21 17:32:58,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:32:58,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:58,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:32:58,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:32:58,871 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:58,880 INFO L93 Difference]: Finished difference Result 18 states and 29 transitions. [2021-08-21 17:32:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:32:58,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-08-21 17:32:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:58,881 INFO L225 Difference]: With dead ends: 18 [2021-08-21 17:32:58,881 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 17:32:58,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:32:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 17:32:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 17:32:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2021-08-21 17:32:58,883 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 11 [2021-08-21 17:32:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:58,883 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2021-08-21 17:32:58,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2021-08-21 17:32:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:32:58,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:58,884 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:58,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:59,100 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 17:32:59,100 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1753776889, now seen corresponding path program 2 times [2021-08-21 17:32:59,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:59,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153963043] [2021-08-21 17:32:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:59,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:59,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:59,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153963043] [2021-08-21 17:32:59,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153963043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:59,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099686815] [2021-08-21 17:32:59,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:59,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:59,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:59,162 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 17:32:59,163 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 17:32:59,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:32:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:59,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099686815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:59,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:59,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-21 17:32:59,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889627748] [2021-08-21 17:32:59,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:32:59,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:32:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:59,299 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:59,325 INFO L93 Difference]: Finished difference Result 21 states and 35 transitions. [2021-08-21 17:32:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:32:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:32:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:59,327 INFO L225 Difference]: With dead ends: 21 [2021-08-21 17:32:59,327 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 17:32:59,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 17:32:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-21 17:32:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2021-08-21 17:32:59,334 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 12 [2021-08-21 17:32:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:59,334 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2021-08-21 17:32:59,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2021-08-21 17:32:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:32:59,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:59,334 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:59,352 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 17:32:59,550 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 17:32:59,550 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:32:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash 397611894, now seen corresponding path program 3 times [2021-08-21 17:32:59,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:59,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048917205] [2021-08-21 17:32:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:59,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:59,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:59,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048917205] [2021-08-21 17:32:59,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048917205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:59,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423810711] [2021-08-21 17:32:59,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:59,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:59,594 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 17:32:59,600 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 17:32:59,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:32:59,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:59,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:32:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:59,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:32:59,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-21 17:32:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:59,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423810711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:59,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:59,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 17:32:59,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407959295] [2021-08-21 17:32:59,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:32:59,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:32:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:59,781 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:59,830 INFO L93 Difference]: Finished difference Result 50 states and 75 transitions. [2021-08-21 17:32:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:32:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 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 13 [2021-08-21 17:32:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:59,831 INFO L225 Difference]: With dead ends: 50 [2021-08-21 17:32:59,831 INFO L226 Difference]: Without dead ends: 47 [2021-08-21 17:32:59,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-21 17:32:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2021-08-21 17:32:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 55 transitions. [2021-08-21 17:32:59,834 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 55 transitions. Word has length 13 [2021-08-21 17:32:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:59,834 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 55 transitions. [2021-08-21 17:32:59,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 55 transitions. [2021-08-21 17:32:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:32:59,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:59,835 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:59,861 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 17:33:00,051 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 17:33:00,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash 563129188, now seen corresponding path program 4 times [2021-08-21 17:33:00,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:00,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630100483] [2021-08-21 17:33:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:00,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:00,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:00,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630100483] [2021-08-21 17:33:00,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630100483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:00,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643826977] [2021-08-21 17:33:00,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:00,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:00,085 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 17:33:00,086 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 17:33:00,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:00,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:33:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:00,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:00,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-21 17:33:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:00,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643826977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:00,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:00,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 17:33:00,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555441468] [2021-08-21 17:33:00,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:33:00,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:00,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:33:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:00,268 INFO L87 Difference]: Start difference. First operand 29 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17:33:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:00,319 INFO L93 Difference]: Finished difference Result 56 states and 91 transitions. [2021-08-21 17:33:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13 [2021-08-21 17:33:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:00,320 INFO L225 Difference]: With dead ends: 56 [2021-08-21 17:33:00,320 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 17:33:00,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 17:33:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-08-21 17:33:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 69 transitions. [2021-08-21 17:33:00,324 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 69 transitions. Word has length 13 [2021-08-21 17:33:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:00,324 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 69 transitions. [2021-08-21 17:33:00,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17:33:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 69 transitions. [2021-08-21 17:33:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:33:00,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:00,325 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:00,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-21 17:33:00,548 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 17:33:00,549 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:00,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:00,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1166721956, now seen corresponding path program 5 times [2021-08-21 17:33:00,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:00,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987026314] [2021-08-21 17:33:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:00,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:00,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:00,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987026314] [2021-08-21 17:33:00,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987026314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:00,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601007863] [2021-08-21 17:33:00,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:00,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:00,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:00,585 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 17:33:00,589 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 17:33:00,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:33:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:33:00,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:00,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:00,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-21 17:33:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:00,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601007863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:00,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:00,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 17:33:00,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216581052] [2021-08-21 17:33:00,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:33:00,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:33:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:00,761 INFO L87 Difference]: Start difference. First operand 34 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17:33:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:00,791 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2021-08-21 17:33:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13 [2021-08-21 17:33:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:00,792 INFO L225 Difference]: With dead ends: 62 [2021-08-21 17:33:00,792 INFO L226 Difference]: Without dead ends: 59 [2021-08-21 17:33:00,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-21 17:33:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2021-08-21 17:33:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-08-21 17:33:00,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-08-21 17:33:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:00,795 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-08-21 17:33:00,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17:33:00,796 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-08-21 17:33:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:33:00,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:00,796 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:00,816 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 17:33:01,011 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 17:33:01,012 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1042467428, now seen corresponding path program 6 times [2021-08-21 17:33:01,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:01,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82859] [2021-08-21 17:33:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:01,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:01,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:01,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82859] [2021-08-21 17:33:01,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:01,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208977320] [2021-08-21 17:33:01,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:01,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:01,047 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 17:33:01,048 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 17:33:01,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:01,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:33:01,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:01,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:01,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-08-21 17:33:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:01,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208977320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:01,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:01,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-08-21 17:33:01,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499509237] [2021-08-21 17:33:01,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:33:01,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:33:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:01,215 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17:33:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:01,254 INFO L93 Difference]: Finished difference Result 69 states and 125 transitions. [2021-08-21 17:33:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 13 [2021-08-21 17:33:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:01,254 INFO L225 Difference]: With dead ends: 69 [2021-08-21 17:33:01,255 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 17:33:01,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 17:33:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2021-08-21 17:33:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.239130434782609) internal successors, (103), 46 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 103 transitions. [2021-08-21 17:33:01,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 103 transitions. Word has length 13 [2021-08-21 17:33:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:01,258 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 103 transitions. [2021-08-21 17:33:01,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17:33:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 103 transitions. [2021-08-21 17:33:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:01,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:01,259 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:01,277 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 17:33:01,475 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 17:33:01,475 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:01,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1628812569, now seen corresponding path program 7 times [2021-08-21 17:33:01,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:01,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697456157] [2021-08-21 17:33:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:01,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:01,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:01,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697456157] [2021-08-21 17:33:01,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697456157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:01,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252037183] [2021-08-21 17:33:01,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:01,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:01,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:01,546 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 17:33:01,548 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 17:33:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:01,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:01,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:01,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252037183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:01,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:01,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:33:01,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974396241] [2021-08-21 17:33:01,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:01,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:01,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:01,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:01,669 INFO L87 Difference]: Start difference. First operand 47 states and 103 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:01,740 INFO L93 Difference]: Finished difference Result 66 states and 133 transitions. [2021-08-21 17:33:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:33:01,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:01,741 INFO L225 Difference]: With dead ends: 66 [2021-08-21 17:33:01,741 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 17:33:01,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 17:33:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2021-08-21 17:33:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 113 transitions. [2021-08-21 17:33:01,756 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 113 transitions. Word has length 14 [2021-08-21 17:33:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:01,757 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 113 transitions. [2021-08-21 17:33:01,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 113 transitions. [2021-08-21 17:33:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:01,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:01,757 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:01,779 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 17:33:01,976 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 17:33:01,977 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash -535864169, now seen corresponding path program 8 times [2021-08-21 17:33:01,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:01,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520567432] [2021-08-21 17:33:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:01,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:02,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:02,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520567432] [2021-08-21 17:33:02,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520567432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:02,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431165064] [2021-08-21 17:33:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:02,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:02,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:02,026 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 17:33:02,027 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 17:33:02,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:02,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:02,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:02,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:02,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431165064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:02,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:02,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:33:02,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255661529] [2021-08-21 17:33:02,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:02,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:02,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:02,144 INFO L87 Difference]: Start difference. First operand 50 states and 113 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:02,212 INFO L93 Difference]: Finished difference Result 86 states and 158 transitions. [2021-08-21 17:33:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:33:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:02,213 INFO L225 Difference]: With dead ends: 86 [2021-08-21 17:33:02,213 INFO L226 Difference]: Without dead ends: 84 [2021-08-21 17:33:02,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:33:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-21 17:33:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2021-08-21 17:33:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 133 transitions. [2021-08-21 17:33:02,215 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 133 transitions. Word has length 14 [2021-08-21 17:33:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:02,216 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 133 transitions. [2021-08-21 17:33:02,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 133 transitions. [2021-08-21 17:33:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:02,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:02,216 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:02,234 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 17:33:02,432 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 17:33:02,432 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:02,433 INFO L82 PathProgramCache]: Analyzing trace with hash 311712087, now seen corresponding path program 9 times [2021-08-21 17:33:02,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:02,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780466109] [2021-08-21 17:33:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:02,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:02,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:02,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780466109] [2021-08-21 17:33:02,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780466109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:02,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038020065] [2021-08-21 17:33:02,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:02,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:02,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:02,471 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 17:33:02,502 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 17:33:02,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:33:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:02,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038020065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:02,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:02,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:02,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731075716] [2021-08-21 17:33:02,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:02,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:02,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:02,591 INFO L87 Difference]: Start difference. First operand 60 states and 133 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:02,634 INFO L93 Difference]: Finished difference Result 87 states and 161 transitions. [2021-08-21 17:33:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:33:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:02,635 INFO L225 Difference]: With dead ends: 87 [2021-08-21 17:33:02,635 INFO L226 Difference]: Without dead ends: 87 [2021-08-21 17:33:02,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-21 17:33:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2021-08-21 17:33:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 133 transitions. [2021-08-21 17:33:02,638 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 133 transitions. Word has length 14 [2021-08-21 17:33:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:02,638 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 133 transitions. [2021-08-21 17:33:02,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 133 transitions. [2021-08-21 17:33:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:02,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:02,638 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:02,656 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 17:33:02,854 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 17:33:02,854 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash 300204649, now seen corresponding path program 10 times [2021-08-21 17:33:02,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:02,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090221875] [2021-08-21 17:33:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:02,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:02,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:02,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090221875] [2021-08-21 17:33:02,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090221875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:02,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351706463] [2021-08-21 17:33:02,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:02,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:02,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:02,892 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 17:33:02,893 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 17:33:02,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:02,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:03,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351706463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:03,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:03,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:03,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520926974] [2021-08-21 17:33:03,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:03,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:03,010 INFO L87 Difference]: Start difference. First operand 60 states and 133 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:03,055 INFO L93 Difference]: Finished difference Result 93 states and 172 transitions. [2021-08-21 17:33:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:03,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:03,056 INFO L225 Difference]: With dead ends: 93 [2021-08-21 17:33:03,056 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 17:33:03,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 17:33:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-08-21 17:33:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.28125) internal successors, (146), 64 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 146 transitions. [2021-08-21 17:33:03,058 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 146 transitions. Word has length 14 [2021-08-21 17:33:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:03,058 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 146 transitions. [2021-08-21 17:33:03,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 146 transitions. [2021-08-21 17:33:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:03,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:03,059 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:03,077 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 17:33:03,275 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 17:33:03,275 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1101820877, now seen corresponding path program 11 times [2021-08-21 17:33:03,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:03,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776256410] [2021-08-21 17:33:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:03,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:03,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:03,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776256410] [2021-08-21 17:33:03,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776256410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:03,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336101377] [2021-08-21 17:33:03,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:03,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:03,324 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 17:33:03,325 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 17:33:03,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:33:03,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:03,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336101377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:03,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:03,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:03,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151406569] [2021-08-21 17:33:03,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:03,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:03,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:03,448 INFO L87 Difference]: Start difference. First operand 65 states and 146 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:03,481 INFO L93 Difference]: Finished difference Result 91 states and 180 transitions. [2021-08-21 17:33:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:33:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:03,481 INFO L225 Difference]: With dead ends: 91 [2021-08-21 17:33:03,482 INFO L226 Difference]: Without dead ends: 91 [2021-08-21 17:33:03,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-21 17:33:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-08-21 17:33:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.323529411764706) internal successors, (158), 68 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 158 transitions. [2021-08-21 17:33:03,484 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 158 transitions. Word has length 14 [2021-08-21 17:33:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:03,484 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 158 transitions. [2021-08-21 17:33:03,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 158 transitions. [2021-08-21 17:33:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:03,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:03,485 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:03,503 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 17:33:03,700 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 17:33:03,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1418139057, now seen corresponding path program 12 times [2021-08-21 17:33:03,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:03,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824801979] [2021-08-21 17:33:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:03,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:03,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:03,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824801979] [2021-08-21 17:33:03,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824801979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:03,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384487082] [2021-08-21 17:33:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:03,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:03,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:03,753 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 17:33:03,753 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 17:33:03,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:33:03,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:03,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384487082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:03,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:03,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:03,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253067724] [2021-08-21 17:33:03,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:03,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:03,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:03,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:03,917 INFO L87 Difference]: Start difference. First operand 69 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:03,953 INFO L93 Difference]: Finished difference Result 97 states and 186 transitions. [2021-08-21 17:33:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:33:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:03,954 INFO L225 Difference]: With dead ends: 97 [2021-08-21 17:33:03,954 INFO L226 Difference]: Without dead ends: 97 [2021-08-21 17:33:03,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:03,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-21 17:33:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 69. [2021-08-21 17:33:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.323529411764706) internal successors, (158), 68 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 158 transitions. [2021-08-21 17:33:03,956 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 158 transitions. Word has length 14 [2021-08-21 17:33:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:03,956 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 158 transitions. [2021-08-21 17:33:03,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 158 transitions. [2021-08-21 17:33:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:03,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:03,957 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:03,983 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 17:33:04,157 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 17:33:04,157 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash 292474251, now seen corresponding path program 13 times [2021-08-21 17:33:04,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:04,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816719297] [2021-08-21 17:33:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:04,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:04,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:04,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816719297] [2021-08-21 17:33:04,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816719297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:04,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827141076] [2021-08-21 17:33:04,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:04,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:04,214 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 17:33:04,215 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 17:33:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:04,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827141076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:04,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:04,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:33:04,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277627354] [2021-08-21 17:33:04,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:04,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:04,389 INFO L87 Difference]: Start difference. First operand 69 states and 158 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:04,438 INFO L93 Difference]: Finished difference Result 100 states and 192 transitions. [2021-08-21 17:33:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:04,439 INFO L225 Difference]: With dead ends: 100 [2021-08-21 17:33:04,439 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 17:33:04,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 17:33:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2021-08-21 17:33:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.323529411764706) internal successors, (158), 68 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 158 transitions. [2021-08-21 17:33:04,442 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 158 transitions. Word has length 14 [2021-08-21 17:33:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:04,442 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 158 transitions. [2021-08-21 17:33:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 158 transitions. [2021-08-21 17:33:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:04,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:04,443 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:04,459 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 17:33:04,656 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 17:33:04,657 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1785573263, now seen corresponding path program 14 times [2021-08-21 17:33:04,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:04,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328271820] [2021-08-21 17:33:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:04,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:04,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:04,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328271820] [2021-08-21 17:33:04,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328271820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:04,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787582223] [2021-08-21 17:33:04,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:04,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:04,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:04,693 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 17:33:04,699 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 17:33:04,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:04,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:04,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787582223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:04,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:04,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:04,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029526299] [2021-08-21 17:33:04,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:04,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:04,834 INFO L87 Difference]: Start difference. First operand 69 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:04,878 INFO L93 Difference]: Finished difference Result 103 states and 199 transitions. [2021-08-21 17:33:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:04,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:04,879 INFO L225 Difference]: With dead ends: 103 [2021-08-21 17:33:04,879 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 17:33:04,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 17:33:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2021-08-21 17:33:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 75 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 175 transitions. [2021-08-21 17:33:04,881 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 175 transitions. Word has length 14 [2021-08-21 17:33:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:04,881 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 175 transitions. [2021-08-21 17:33:04,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 175 transitions. [2021-08-21 17:33:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:04,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:04,882 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:04,907 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 17:33:05,098 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 17:33:05,098 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:05,099 INFO L82 PathProgramCache]: Analyzing trace with hash -983957035, now seen corresponding path program 15 times [2021-08-21 17:33:05,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:05,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566803654] [2021-08-21 17:33:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:05,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:05,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:05,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566803654] [2021-08-21 17:33:05,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566803654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:05,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725113087] [2021-08-21 17:33:05,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:05,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:05,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:05,148 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 17:33:05,149 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 17:33:05,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:33:05,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:05,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:05,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725113087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:05,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:05,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:05,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671574435] [2021-08-21 17:33:05,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:05,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:05,300 INFO L87 Difference]: Start difference. First operand 76 states and 175 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:05,329 INFO L93 Difference]: Finished difference Result 108 states and 215 transitions. [2021-08-21 17:33:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:33:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:05,330 INFO L225 Difference]: With dead ends: 108 [2021-08-21 17:33:05,330 INFO L226 Difference]: Without dead ends: 108 [2021-08-21 17:33:05,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-21 17:33:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 80. [2021-08-21 17:33:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.367088607594937) internal successors, (187), 79 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 187 transitions. [2021-08-21 17:33:05,332 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 187 transitions. Word has length 14 [2021-08-21 17:33:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:05,332 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 187 transitions. [2021-08-21 17:33:05,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 187 transitions. [2021-08-21 17:33:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:05,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:05,333 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:05,349 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 17:33:05,549 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 17:33:05,549 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash 791050327, now seen corresponding path program 16 times [2021-08-21 17:33:05,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:05,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512271682] [2021-08-21 17:33:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:05,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:05,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:05,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512271682] [2021-08-21 17:33:05,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512271682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:05,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089167788] [2021-08-21 17:33:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:05,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:05,587 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 17:33:05,588 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 17:33:05,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:05,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:05,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:05,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089167788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:05,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:05,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 17:33:05,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578850026] [2021-08-21 17:33:05,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:33:05,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:33:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:33:05,739 INFO L87 Difference]: Start difference. First operand 80 states and 187 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:05,767 INFO L93 Difference]: Finished difference Result 106 states and 211 transitions. [2021-08-21 17:33:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:33:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:05,767 INFO L225 Difference]: With dead ends: 106 [2021-08-21 17:33:05,768 INFO L226 Difference]: Without dead ends: 106 [2021-08-21 17:33:05,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-21 17:33:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2021-08-21 17:33:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.367088607594937) internal successors, (187), 79 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 187 transitions. [2021-08-21 17:33:05,770 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 187 transitions. Word has length 14 [2021-08-21 17:33:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:05,770 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 187 transitions. [2021-08-21 17:33:05,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 187 transitions. [2021-08-21 17:33:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:05,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:05,770 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:05,786 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 17:33:05,986 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 17:33:05,986 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:05,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1793303661, now seen corresponding path program 17 times [2021-08-21 17:33:05,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:05,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525151652] [2021-08-21 17:33:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:05,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:06,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:06,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525151652] [2021-08-21 17:33:06,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525151652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:06,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109847588] [2021-08-21 17:33:06,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:06,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:06,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:06,040 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 17:33:06,041 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 17:33:06,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:33:06,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:06,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:06,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109847588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:06,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:06,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:33:06,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87697286] [2021-08-21 17:33:06,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:06,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:06,179 INFO L87 Difference]: Start difference. First operand 80 states and 187 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:06,229 INFO L93 Difference]: Finished difference Result 107 states and 213 transitions. [2021-08-21 17:33:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:06,230 INFO L225 Difference]: With dead ends: 107 [2021-08-21 17:33:06,230 INFO L226 Difference]: Without dead ends: 107 [2021-08-21 17:33:06,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-21 17:33:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2021-08-21 17:33:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.367088607594937) internal successors, (187), 79 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 187 transitions. [2021-08-21 17:33:06,232 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 187 transitions. Word has length 14 [2021-08-21 17:33:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:06,232 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 187 transitions. [2021-08-21 17:33:06,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 187 transitions. [2021-08-21 17:33:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:06,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:06,233 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:06,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 17:33:06,448 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 17:33:06,449 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash -303898665, now seen corresponding path program 18 times [2021-08-21 17:33:06,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:06,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727325015] [2021-08-21 17:33:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:06,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:06,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:06,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727325015] [2021-08-21 17:33:06,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727325015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:06,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272543781] [2021-08-21 17:33:06,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:06,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:06,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:06,507 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 17:33:06,539 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 17:33:06,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:33:06,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:06,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272543781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:06,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:06,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:33:06,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885631730] [2021-08-21 17:33:06,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:06,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:06,672 INFO L87 Difference]: Start difference. First operand 80 states and 187 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:06,738 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2021-08-21 17:33:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:06,739 INFO L225 Difference]: With dead ends: 104 [2021-08-21 17:33:06,739 INFO L226 Difference]: Without dead ends: 104 [2021-08-21 17:33:06,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-21 17:33:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-08-21 17:33:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.364705882352941) internal successors, (201), 85 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 201 transitions. [2021-08-21 17:33:06,741 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 201 transitions. Word has length 14 [2021-08-21 17:33:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 201 transitions. [2021-08-21 17:33:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 201 transitions. [2021-08-21 17:33:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:06,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:06,742 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:06,761 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 17:33:06,961 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 17:33:06,961 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:06,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2020179095, now seen corresponding path program 19 times [2021-08-21 17:33:06,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:06,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745714193] [2021-08-21 17:33:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:06,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:07,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:07,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745714193] [2021-08-21 17:33:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745714193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:07,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307298700] [2021-08-21 17:33:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:07,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:07,006 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 17:33:07,007 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 17:33:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:07,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307298700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:07,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:07,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 17:33:07,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207213831] [2021-08-21 17:33:07,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:07,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:07,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:07,206 INFO L87 Difference]: Start difference. First operand 86 states and 201 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:07,272 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2021-08-21 17:33:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:33:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:07,273 INFO L225 Difference]: With dead ends: 127 [2021-08-21 17:33:07,274 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 17:33:07,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 17:33:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-08-21 17:33:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.36) internal successors, (236), 100 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 236 transitions. [2021-08-21 17:33:07,277 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 236 transitions. Word has length 14 [2021-08-21 17:33:07,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:07,277 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 236 transitions. [2021-08-21 17:33:07,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 236 transitions. [2021-08-21 17:33:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:07,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:07,278 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:07,301 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 17:33:07,482 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 17:33:07,482 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:07,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1218562867, now seen corresponding path program 20 times [2021-08-21 17:33:07,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:07,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967090746] [2021-08-21 17:33:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:07,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:07,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:07,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967090746] [2021-08-21 17:33:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967090746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:07,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52773875] [2021-08-21 17:33:07,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:07,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:07,534 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 17:33:07,536 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 17:33:07,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:07,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52773875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:07,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:07,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 17:33:07,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554337772] [2021-08-21 17:33:07,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:07,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:07,751 INFO L87 Difference]: Start difference. First operand 101 states and 236 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:07,797 INFO L93 Difference]: Finished difference Result 143 states and 293 transitions. [2021-08-21 17:33:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:33:07,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:07,798 INFO L225 Difference]: With dead ends: 143 [2021-08-21 17:33:07,798 INFO L226 Difference]: Without dead ends: 143 [2021-08-21 17:33:07,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-21 17:33:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 106. [2021-08-21 17:33:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.3904761904761904) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 251 transitions. [2021-08-21 17:33:07,802 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 251 transitions. Word has length 14 [2021-08-21 17:33:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:07,802 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 251 transitions. [2021-08-21 17:33:07,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 251 transitions. [2021-08-21 17:33:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:07,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:07,802 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:07,851 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 17:33:08,023 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 17:33:08,023 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:08,023 INFO L82 PathProgramCache]: Analyzing trace with hash 556444495, now seen corresponding path program 21 times [2021-08-21 17:33:08,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:08,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548557985] [2021-08-21 17:33:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:08,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:08,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:08,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548557985] [2021-08-21 17:33:08,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548557985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:08,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952766909] [2021-08-21 17:33:08,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:08,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:08,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:08,101 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 17:33:08,101 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 17:33:08,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:33:08,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:08,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:08,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952766909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:08,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:08,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 17:33:08,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890666961] [2021-08-21 17:33:08,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:33:08,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:33:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:33:08,280 INFO L87 Difference]: Start difference. First operand 106 states and 251 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:08,325 INFO L93 Difference]: Finished difference Result 127 states and 270 transitions. [2021-08-21 17:33:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:08,326 INFO L225 Difference]: With dead ends: 127 [2021-08-21 17:33:08,326 INFO L226 Difference]: Without dead ends: 127 [2021-08-21 17:33:08,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-21 17:33:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2021-08-21 17:33:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.375) internal successors, (247), 104 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 17:33:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 247 transitions. [2021-08-21 17:33:08,329 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 247 transitions. Word has length 14 [2021-08-21 17:33:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:08,329 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 247 transitions. [2021-08-21 17:33:08,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 247 transitions. [2021-08-21 17:33:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:08,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:08,330 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:08,349 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 17:33:08,546 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 17:33:08,547 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2027909493, now seen corresponding path program 22 times [2021-08-21 17:33:08,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:08,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604296074] [2021-08-21 17:33:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:08,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:08,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:08,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604296074] [2021-08-21 17:33:08,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604296074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:08,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498296976] [2021-08-21 17:33:08,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:08,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:08,596 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 17:33:08,597 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 17:33:08,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:08,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:08,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:08,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498296976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:08,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:08,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 17:33:08,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522000215] [2021-08-21 17:33:08,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:33:08,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:33:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:08,788 INFO L87 Difference]: Start difference. First operand 105 states and 247 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:08,883 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2021-08-21 17:33:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:33:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:08,884 INFO L225 Difference]: With dead ends: 133 [2021-08-21 17:33:08,884 INFO L226 Difference]: Without dead ends: 133 [2021-08-21 17:33:08,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:33:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-21 17:33:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2021-08-21 17:33:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.372549019607843) internal successors, (242), 102 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 242 transitions. [2021-08-21 17:33:08,887 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 242 transitions. Word has length 14 [2021-08-21 17:33:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 242 transitions. [2021-08-21 17:33:08,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 242 transitions. [2021-08-21 17:33:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:08,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:08,887 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:08,905 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 17:33:09,103 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 17:33:09,103 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash -538504497, now seen corresponding path program 23 times [2021-08-21 17:33:09,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:09,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887816539] [2021-08-21 17:33:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:09,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:09,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:09,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887816539] [2021-08-21 17:33:09,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887816539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:09,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939906145] [2021-08-21 17:33:09,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:09,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:09,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:09,165 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 17:33:09,174 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 17:33:09,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:33:09,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:09,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939906145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:09,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:09,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 17:33:09,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893088188] [2021-08-21 17:33:09,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:33:09,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:33:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:09,365 INFO L87 Difference]: Start difference. First operand 103 states and 242 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:09,430 INFO L93 Difference]: Finished difference Result 118 states and 265 transitions. [2021-08-21 17:33:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:33:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:09,431 INFO L225 Difference]: With dead ends: 118 [2021-08-21 17:33:09,431 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 17:33:09,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 17:33:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-08-21 17:33:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.372549019607843) internal successors, (242), 102 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 242 transitions. [2021-08-21 17:33:09,433 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 242 transitions. Word has length 14 [2021-08-21 17:33:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:09,433 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 242 transitions. [2021-08-21 17:33:09,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 242 transitions. [2021-08-21 17:33:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:33:09,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:09,434 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:09,452 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 17:33:09,649 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 17:33:09,650 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1611589877, now seen corresponding path program 24 times [2021-08-21 17:33:09,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:09,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985836750] [2021-08-21 17:33:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:09,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:09,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:09,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985836750] [2021-08-21 17:33:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985836750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:09,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827520807] [2021-08-21 17:33:09,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:09,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:09,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:09,707 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 17:33:09,708 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 17:33:09,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:09,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:33:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827520807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:09,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:09,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 17:33:09,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172538034] [2021-08-21 17:33:09,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:09,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:09,913 INFO L87 Difference]: Start difference. First operand 103 states and 242 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:10,046 INFO L93 Difference]: Finished difference Result 141 states and 318 transitions. [2021-08-21 17:33:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 14 [2021-08-21 17:33:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:10,047 INFO L225 Difference]: With dead ends: 141 [2021-08-21 17:33:10,047 INFO L226 Difference]: Without dead ends: 141 [2021-08-21 17:33:10,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:33:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-21 17:33:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2021-08-21 17:33:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.336283185840708) internal successors, (264), 113 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 264 transitions. [2021-08-21 17:33:10,049 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 264 transitions. Word has length 14 [2021-08-21 17:33:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:10,049 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 264 transitions. [2021-08-21 17:33:10,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 264 transitions. [2021-08-21 17:33:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:33:10,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:10,050 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:10,066 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 17:33:10,266 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 17:33:10,266 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:10,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1069486918, now seen corresponding path program 25 times [2021-08-21 17:33:10,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:10,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245245668] [2021-08-21 17:33:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:10,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:10,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:10,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245245668] [2021-08-21 17:33:10,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245245668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:10,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746322488] [2021-08-21 17:33:10,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:10,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:10,325 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 17:33:10,326 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 17:33:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:10,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:10,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746322488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:10,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:10,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-21 17:33:10,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590699119] [2021-08-21 17:33:10,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:10,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:10,557 INFO L87 Difference]: Start difference. First operand 114 states and 264 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:10,637 INFO L93 Difference]: Finished difference Result 404 states and 896 transitions. [2021-08-21 17:33:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:10,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 15 [2021-08-21 17:33:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:10,639 INFO L225 Difference]: With dead ends: 404 [2021-08-21 17:33:10,639 INFO L226 Difference]: Without dead ends: 404 [2021-08-21 17:33:10,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:10,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-21 17:33:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 305. [2021-08-21 17:33:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.3289473684210527) internal successors, (708), 304 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 708 transitions. [2021-08-21 17:33:10,645 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 708 transitions. Word has length 15 [2021-08-21 17:33:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:10,645 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 708 transitions. [2021-08-21 17:33:10,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 708 transitions. [2021-08-21 17:33:10,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:33:10,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:10,646 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:10,664 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 17:33:10,861 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 17:33:10,862 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash -704236937, now seen corresponding path program 26 times [2021-08-21 17:33:10,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:10,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275074912] [2021-08-21 17:33:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:10,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:10,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275074912] [2021-08-21 17:33:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275074912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167292907] [2021-08-21 17:33:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:10,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:10,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:10,916 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 17:33:10,917 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 17:33:11,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:11,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:33:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:33:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167292907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:11,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:11,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 17:33:11,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823224723] [2021-08-21 17:33:11,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:11,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:11,169 INFO L87 Difference]: Start difference. First operand 305 states and 708 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:11,260 INFO L93 Difference]: Finished difference Result 442 states and 943 transitions. [2021-08-21 17:33:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:33:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:11,261 INFO L225 Difference]: With dead ends: 442 [2021-08-21 17:33:11,261 INFO L226 Difference]: Without dead ends: 442 [2021-08-21 17:33:11,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:33:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-08-21 17:33:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 191. [2021-08-21 17:33:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1526315789473682) internal successors, (409), 190 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 409 transitions. [2021-08-21 17:33:11,268 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 409 transitions. Word has length 16 [2021-08-21 17:33:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:11,268 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 409 transitions. [2021-08-21 17:33:11,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 409 transitions. [2021-08-21 17:33:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:33:11,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:11,268 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:11,289 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 17:33:11,484 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 17:33:11,484 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash 144898406, now seen corresponding path program 27 times [2021-08-21 17:33:11,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:11,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620444411] [2021-08-21 17:33:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:11,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:11,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:11,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620444411] [2021-08-21 17:33:11,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620444411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:11,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221808556] [2021-08-21 17:33:11,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:11,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:11,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:11,541 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 17:33:11,543 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 17:33:11,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:33:11,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:33:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:11,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:11,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 17:33:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:12,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221808556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:12,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:12,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-21 17:33:12,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186401192] [2021-08-21 17:33:12,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:33:12,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:12,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:33:12,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:12,303 INFO L87 Difference]: Start difference. First operand 191 states and 409 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:12,377 INFO L93 Difference]: Finished difference Result 241 states and 499 transitions. [2021-08-21 17:33:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:12,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:33:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:12,378 INFO L225 Difference]: With dead ends: 241 [2021-08-21 17:33:12,378 INFO L226 Difference]: Without dead ends: 238 [2021-08-21 17:33:12,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-21 17:33:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 219. [2021-08-21 17:33:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.165137614678899) internal successors, (472), 218 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 472 transitions. [2021-08-21 17:33:12,382 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 472 transitions. Word has length 17 [2021-08-21 17:33:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:12,382 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 472 transitions. [2021-08-21 17:33:12,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 472 transitions. [2021-08-21 17:33:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:33:12,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:12,382 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:12,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:12,598 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 17:33:12,599 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:12,599 INFO L82 PathProgramCache]: Analyzing trace with hash 973236826, now seen corresponding path program 28 times [2021-08-21 17:33:12,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:12,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746541616] [2021-08-21 17:33:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:12,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:12,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:12,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746541616] [2021-08-21 17:33:12,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746541616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:12,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574263727] [2021-08-21 17:33:12,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:12,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:12,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:12,647 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 17:33:12,648 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 17:33:12,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:12,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:33:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:13,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:13,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 17:33:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:13,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574263727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:13,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:13,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-21 17:33:13,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787451342] [2021-08-21 17:33:13,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:33:13,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:33:13,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:13,504 INFO L87 Difference]: Start difference. First operand 219 states and 472 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:13,602 INFO L93 Difference]: Finished difference Result 268 states and 566 transitions. [2021-08-21 17:33:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:33:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:13,603 INFO L225 Difference]: With dead ends: 268 [2021-08-21 17:33:13,603 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 17:33:13,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 17:33:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 249. [2021-08-21 17:33:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.1774193548387095) internal successors, (540), 248 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 540 transitions. [2021-08-21 17:33:13,608 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 540 transitions. Word has length 17 [2021-08-21 17:33:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:13,608 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 540 transitions. [2021-08-21 17:33:13,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 540 transitions. [2021-08-21 17:33:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:33:13,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:13,608 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:13,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:13,824 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 17:33:13,825 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash 376863910, now seen corresponding path program 29 times [2021-08-21 17:33:13,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:13,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471403557] [2021-08-21 17:33:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:13,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:13,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:13,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471403557] [2021-08-21 17:33:13,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471403557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:13,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538872727] [2021-08-21 17:33:13,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:13,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:13,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:13,872 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 17:33:13,872 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 17:33:14,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:33:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:14,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:33:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:14,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:14,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 17:33:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:14,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538872727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:14,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:14,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-21 17:33:14,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598895980] [2021-08-21 17:33:14,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:33:14,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:14,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:33:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:14,545 INFO L87 Difference]: Start difference. First operand 249 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:14,662 INFO L93 Difference]: Finished difference Result 307 states and 655 transitions. [2021-08-21 17:33:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:33:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:14,663 INFO L225 Difference]: With dead ends: 307 [2021-08-21 17:33:14,663 INFO L226 Difference]: Without dead ends: 304 [2021-08-21 17:33:14,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-21 17:33:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 287. [2021-08-21 17:33:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.195804195804196) internal successors, (628), 286 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 628 transitions. [2021-08-21 17:33:14,670 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 628 transitions. Word has length 17 [2021-08-21 17:33:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:14,670 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 628 transitions. [2021-08-21 17:33:14,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 628 transitions. [2021-08-21 17:33:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:33:14,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:14,671 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:14,710 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 17:33:14,887 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 17:33:14,887 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -930827302, now seen corresponding path program 30 times [2021-08-21 17:33:14,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:14,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793845159] [2021-08-21 17:33:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:14,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:14,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:14,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793845159] [2021-08-21 17:33:14,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793845159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:14,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541324152] [2021-08-21 17:33:14,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:14,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:14,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:14,965 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 17:33:14,970 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 17:33:15,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:33:15,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:15,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:33:15,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:15,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:15,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 17:33:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:15,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541324152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:15,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:15,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-21 17:33:15,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956403122] [2021-08-21 17:33:15,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:33:15,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:33:15,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:15,860 INFO L87 Difference]: Start difference. First operand 287 states and 628 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:15,964 INFO L93 Difference]: Finished difference Result 363 states and 778 transitions. [2021-08-21 17:33:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:15,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:33:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:15,966 INFO L225 Difference]: With dead ends: 363 [2021-08-21 17:33:15,966 INFO L226 Difference]: Without dead ends: 360 [2021-08-21 17:33:15,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-21 17:33:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 336. [2021-08-21 17:33:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.2208955223880595) internal successors, (744), 335 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 744 transitions. [2021-08-21 17:33:15,971 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 744 transitions. Word has length 17 [2021-08-21 17:33:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:15,971 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 744 transitions. [2021-08-21 17:33:15,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:15,972 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 744 transitions. [2021-08-21 17:33:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:33:15,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:15,972 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:15,990 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 17:33:16,188 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 17:33:16,188 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1480418086, now seen corresponding path program 31 times [2021-08-21 17:33:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:16,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585854082] [2021-08-21 17:33:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:16,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:16,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:16,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585854082] [2021-08-21 17:33:16,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585854082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:16,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569014048] [2021-08-21 17:33:16,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:16,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:16,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:16,240 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 17:33:16,241 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 17:33:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:16,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:33:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:16,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:16,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 17:33:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:16,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569014048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:16,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:16,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-21 17:33:16,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304249034] [2021-08-21 17:33:16,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:33:16,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:16,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:33:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:16,962 INFO L87 Difference]: Start difference. First operand 336 states and 744 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:17,065 INFO L93 Difference]: Finished difference Result 398 states and 864 transitions. [2021-08-21 17:33:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:17,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:33:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:17,067 INFO L225 Difference]: With dead ends: 398 [2021-08-21 17:33:17,067 INFO L226 Difference]: Without dead ends: 395 [2021-08-21 17:33:17,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-21 17:33:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 380. [2021-08-21 17:33:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2189973614775726) internal successors, (841), 379 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 17:33:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 841 transitions. [2021-08-21 17:33:17,073 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 841 transitions. Word has length 17 [2021-08-21 17:33:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:17,073 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 841 transitions. [2021-08-21 17:33:17,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 841 transitions. [2021-08-21 17:33:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:33:17,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:17,074 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:17,092 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 17:33:17,290 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 17:33:17,290 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1080386214, now seen corresponding path program 32 times [2021-08-21 17:33:17,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:17,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105269657] [2021-08-21 17:33:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:17,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:17,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:17,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105269657] [2021-08-21 17:33:17,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105269657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:17,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821925314] [2021-08-21 17:33:17,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:17,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:17,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:17,343 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 17:33:17,344 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 17:33:17,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:17,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:17,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:33:17,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:17,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:17,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 17:33:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:18,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821925314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:18,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:18,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-21 17:33:18,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769465575] [2021-08-21 17:33:18,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:33:18,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:33:18,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:18,165 INFO L87 Difference]: Start difference. First operand 380 states and 841 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:18,273 INFO L93 Difference]: Finished difference Result 433 states and 944 transitions. [2021-08-21 17:33:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:33:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:18,275 INFO L225 Difference]: With dead ends: 433 [2021-08-21 17:33:18,275 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 17:33:18,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 17:33:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 418. [2021-08-21 17:33:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.223021582733813) internal successors, (927), 417 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 927 transitions. [2021-08-21 17:33:18,282 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 927 transitions. Word has length 17 [2021-08-21 17:33:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:18,282 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 927 transitions. [2021-08-21 17:33:18,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 927 transitions. [2021-08-21 17:33:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:33:18,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:18,283 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:18,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:18,496 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 17:33:18,496 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1139059110, now seen corresponding path program 33 times [2021-08-21 17:33:18,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:18,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87972067] [2021-08-21 17:33:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:18,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:18,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:18,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87972067] [2021-08-21 17:33:18,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87972067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:18,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337624463] [2021-08-21 17:33:18,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:18,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:18,555 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 17:33:18,556 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 17:33:18,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:33:18,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:33:18,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:18,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:33:18,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-08-21 17:33:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:19,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337624463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:19,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:19,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-21 17:33:19,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684926630] [2021-08-21 17:33:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:33:19,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:33:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:19,411 INFO L87 Difference]: Start difference. First operand 418 states and 927 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:19,550 INFO L93 Difference]: Finished difference Result 467 states and 1015 transitions. [2021-08-21 17:33:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:33:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:19,552 INFO L225 Difference]: With dead ends: 467 [2021-08-21 17:33:19,552 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 17:33:19,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 17:33:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 447. [2021-08-21 17:33:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.226457399103139) internal successors, (993), 446 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 993 transitions. [2021-08-21 17:33:19,560 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 993 transitions. Word has length 17 [2021-08-21 17:33:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:19,560 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 993 transitions. [2021-08-21 17:33:19,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 993 transitions. [2021-08-21 17:33:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:19,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:19,561 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:19,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:19,777 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 17:33:19,777 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash 219952295, now seen corresponding path program 34 times [2021-08-21 17:33:19,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:19,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714262426] [2021-08-21 17:33:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:19,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:19,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:19,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714262426] [2021-08-21 17:33:19,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714262426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:19,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656822362] [2021-08-21 17:33:19,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:19,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:19,850 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 17:33:19,851 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 17:33:20,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:20,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656822362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:20,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:20,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:20,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404666911] [2021-08-21 17:33:20,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:20,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:20,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:20,168 INFO L87 Difference]: Start difference. First operand 447 states and 993 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:20,308 INFO L93 Difference]: Finished difference Result 531 states and 1108 transitions. [2021-08-21 17:33:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:33:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:20,310 INFO L225 Difference]: With dead ends: 531 [2021-08-21 17:33:20,311 INFO L226 Difference]: Without dead ends: 528 [2021-08-21 17:33:20,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:33:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-08-21 17:33:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 468. [2021-08-21 17:33:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.21627408993576) internal successors, (1035), 467 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1035 transitions. [2021-08-21 17:33:20,321 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1035 transitions. Word has length 18 [2021-08-21 17:33:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:20,321 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1035 transitions. [2021-08-21 17:33:20,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1035 transitions. [2021-08-21 17:33:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:20,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:20,322 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:20,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:20,545 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 17:33:20,545 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:20,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash -993331251, now seen corresponding path program 35 times [2021-08-21 17:33:20,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:20,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653944497] [2021-08-21 17:33:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:20,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:20,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:20,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653944497] [2021-08-21 17:33:20,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653944497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:20,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932844133] [2021-08-21 17:33:20,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:20,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:20,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:20,609 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 17:33:20,616 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 17:33:20,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:33:20,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:20,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:20,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932844133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:20,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:20,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:20,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717961841] [2021-08-21 17:33:20,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:20,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:20,906 INFO L87 Difference]: Start difference. First operand 468 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:20,958 INFO L93 Difference]: Finished difference Result 542 states and 1131 transitions. [2021-08-21 17:33:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:20,960 INFO L225 Difference]: With dead ends: 542 [2021-08-21 17:33:20,960 INFO L226 Difference]: Without dead ends: 542 [2021-08-21 17:33:20,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-08-21 17:33:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 444. [2021-08-21 17:33:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.2099322799097068) internal successors, (979), 443 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 979 transitions. [2021-08-21 17:33:20,974 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 979 transitions. Word has length 18 [2021-08-21 17:33:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:20,974 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 979 transitions. [2021-08-21 17:33:20,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 979 transitions. [2021-08-21 17:33:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:20,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:20,975 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:21,006 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 17:33:21,191 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 17:33:21,191 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash 128639539, now seen corresponding path program 36 times [2021-08-21 17:33:21,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:21,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987914177] [2021-08-21 17:33:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:21,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:21,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:21,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987914177] [2021-08-21 17:33:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987914177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:21,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982319010] [2021-08-21 17:33:21,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:21,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:21,259 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 17:33:21,292 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 17:33:21,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:21,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:21,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982319010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:21,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:21,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:21,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878001774] [2021-08-21 17:33:21,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:21,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:21,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:21,562 INFO L87 Difference]: Start difference. First operand 444 states and 979 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:21,640 INFO L93 Difference]: Finished difference Result 524 states and 1088 transitions. [2021-08-21 17:33:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:33:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:21,642 INFO L225 Difference]: With dead ends: 524 [2021-08-21 17:33:21,642 INFO L226 Difference]: Without dead ends: 523 [2021-08-21 17:33:21,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-21 17:33:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 466. [2021-08-21 17:33:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.206451612903226) internal successors, (1026), 465 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 17:33:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1026 transitions. [2021-08-21 17:33:21,650 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1026 transitions. Word has length 18 [2021-08-21 17:33:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:21,650 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1026 transitions. [2021-08-21 17:33:21,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1026 transitions. [2021-08-21 17:33:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:21,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:21,651 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:21,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 17:33:21,868 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 17:33:21,868 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1589704167, now seen corresponding path program 37 times [2021-08-21 17:33:21,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:21,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878172626] [2021-08-21 17:33:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:21,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:21,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:21,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878172626] [2021-08-21 17:33:21,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878172626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:21,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39591675] [2021-08-21 17:33:21,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:21,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:21,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:21,930 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 17:33:21,931 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 17:33:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:22,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:22,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39591675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:22,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:22,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:22,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031777812] [2021-08-21 17:33:22,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:22,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:22,216 INFO L87 Difference]: Start difference. First operand 466 states and 1026 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:22,258 INFO L93 Difference]: Finished difference Result 551 states and 1135 transitions. [2021-08-21 17:33:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:22,259 INFO L225 Difference]: With dead ends: 551 [2021-08-21 17:33:22,259 INFO L226 Difference]: Without dead ends: 551 [2021-08-21 17:33:22,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-21 17:33:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 467. [2021-08-21 17:33:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.2060085836909873) internal successors, (1028), 466 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1028 transitions. [2021-08-21 17:33:22,267 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1028 transitions. Word has length 18 [2021-08-21 17:33:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:22,267 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1028 transitions. [2021-08-21 17:33:22,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1028 transitions. [2021-08-21 17:33:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:22,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:22,268 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:22,313 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 17:33:22,482 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 17:33:22,482 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:22,482 INFO L82 PathProgramCache]: Analyzing trace with hash 120909141, now seen corresponding path program 38 times [2021-08-21 17:33:22,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:22,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514694623] [2021-08-21 17:33:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:22,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:22,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:22,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514694623] [2021-08-21 17:33:22,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514694623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:22,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547123267] [2021-08-21 17:33:22,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:22,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:22,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:22,557 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 17:33:22,582 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 17:33:22,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:22,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:22,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547123267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:22,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:22,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:33:22,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761197888] [2021-08-21 17:33:22,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:22,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:22,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:22,845 INFO L87 Difference]: Start difference. First operand 467 states and 1028 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:22,904 INFO L93 Difference]: Finished difference Result 589 states and 1211 transitions. [2021-08-21 17:33:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:33:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:22,906 INFO L225 Difference]: With dead ends: 589 [2021-08-21 17:33:22,906 INFO L226 Difference]: Without dead ends: 589 [2021-08-21 17:33:22,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-21 17:33:22,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 442. [2021-08-21 17:33:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.199546485260771) internal successors, (970), 441 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 970 transitions. [2021-08-21 17:33:22,913 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 970 transitions. Word has length 18 [2021-08-21 17:33:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:22,913 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 970 transitions. [2021-08-21 17:33:22,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 970 transitions. [2021-08-21 17:33:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:22,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:22,914 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:22,949 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 17:33:23,129 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 17:33:23,129 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1179051673, now seen corresponding path program 39 times [2021-08-21 17:33:23,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:23,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488397487] [2021-08-21 17:33:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:23,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:23,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:23,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488397487] [2021-08-21 17:33:23,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488397487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:23,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838832626] [2021-08-21 17:33:23,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:23,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:23,194 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 17:33:23,195 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 17:33:23,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:33:23,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:23,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:23,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838832626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:23,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:23,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:23,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465588139] [2021-08-21 17:33:23,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:23,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:23,463 INFO L87 Difference]: Start difference. First operand 442 states and 970 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:23,546 INFO L93 Difference]: Finished difference Result 522 states and 1081 transitions. [2021-08-21 17:33:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:33:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:23,547 INFO L225 Difference]: With dead ends: 522 [2021-08-21 17:33:23,547 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 17:33:23,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 17:33:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 466. [2021-08-21 17:33:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.193548387096774) internal successors, (1020), 465 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1020 transitions. [2021-08-21 17:33:23,554 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1020 transitions. Word has length 18 [2021-08-21 17:33:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:23,554 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1020 transitions. [2021-08-21 17:33:23,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1020 transitions. [2021-08-21 17:33:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:23,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:23,555 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:23,574 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 17:33:23,772 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 17:33:23,772 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:23,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1397571917, now seen corresponding path program 40 times [2021-08-21 17:33:23,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:23,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955211591] [2021-08-21 17:33:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:23,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:23,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:23,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955211591] [2021-08-21 17:33:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955211591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:23,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143488582] [2021-08-21 17:33:23,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:23,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:23,830 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 17:33:23,832 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 17:33:24,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:24,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:24,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143488582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:24,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:24,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:24,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143033547] [2021-08-21 17:33:24,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:24,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:24,096 INFO L87 Difference]: Start difference. First operand 466 states and 1020 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:24,136 INFO L93 Difference]: Finished difference Result 543 states and 1115 transitions. [2021-08-21 17:33:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:24,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:24,138 INFO L225 Difference]: With dead ends: 543 [2021-08-21 17:33:24,138 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 17:33:24,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 17:33:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 466. [2021-08-21 17:33:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.193548387096774) internal successors, (1020), 465 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1020 transitions. [2021-08-21 17:33:24,145 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1020 transitions. Word has length 18 [2021-08-21 17:33:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:24,145 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1020 transitions. [2021-08-21 17:33:24,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1020 transitions. [2021-08-21 17:33:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:24,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:24,146 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:24,178 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 17:33:24,361 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 17:33:24,361 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1186782071, now seen corresponding path program 41 times [2021-08-21 17:33:24,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:24,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322989824] [2021-08-21 17:33:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:24,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:24,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:24,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322989824] [2021-08-21 17:33:24,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322989824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:24,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370240021] [2021-08-21 17:33:24,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:24,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:24,416 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 17:33:24,417 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 17:33:24,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:33:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:24,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370240021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:24,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:24,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:33:24,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387699610] [2021-08-21 17:33:24,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:24,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:24,702 INFO L87 Difference]: Start difference. First operand 466 states and 1020 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:24,769 INFO L93 Difference]: Finished difference Result 585 states and 1192 transitions. [2021-08-21 17:33:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:33:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:24,771 INFO L225 Difference]: With dead ends: 585 [2021-08-21 17:33:24,771 INFO L226 Difference]: Without dead ends: 585 [2021-08-21 17:33:24,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-21 17:33:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 439. [2021-08-21 17:33:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.1872146118721463) internal successors, (958), 438 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 958 transitions. [2021-08-21 17:33:24,778 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 958 transitions. Word has length 18 [2021-08-21 17:33:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:24,778 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 958 transitions. [2021-08-21 17:33:24,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 958 transitions. [2021-08-21 17:33:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:24,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:24,779 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:24,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:24,992 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 17:33:24,993 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash 302622925, now seen corresponding path program 42 times [2021-08-21 17:33:24,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:24,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241320998] [2021-08-21 17:33:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:24,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:25,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:25,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241320998] [2021-08-21 17:33:25,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241320998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:25,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638553677] [2021-08-21 17:33:25,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:25,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:25,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:25,050 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 17:33:25,051 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 17:33:25,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:33:25,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:25,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638553677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:25,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:25,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:33:25,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860655452] [2021-08-21 17:33:25,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:25,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:25,386 INFO L87 Difference]: Start difference. First operand 439 states and 958 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:25,469 INFO L93 Difference]: Finished difference Result 769 states and 1610 transitions. [2021-08-21 17:33:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:33:25,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:25,471 INFO L225 Difference]: With dead ends: 769 [2021-08-21 17:33:25,471 INFO L226 Difference]: Without dead ends: 769 [2021-08-21 17:33:25,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-21 17:33:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 610. [2021-08-21 17:33:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 2.2036124794745486) internal successors, (1342), 609 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1342 transitions. [2021-08-21 17:33:25,479 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1342 transitions. Word has length 18 [2021-08-21 17:33:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:25,479 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1342 transitions. [2021-08-21 17:33:25,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1342 transitions. [2021-08-21 17:33:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:25,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:25,481 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:25,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:25,697 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 17:33:25,697 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1232193715, now seen corresponding path program 43 times [2021-08-21 17:33:25,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:25,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044192794] [2021-08-21 17:33:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:25,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:25,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:25,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044192794] [2021-08-21 17:33:25,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044192794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:25,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354913077] [2021-08-21 17:33:25,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:25,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:25,750 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 17:33:25,751 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 17:33:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:26,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:26,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:26,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354913077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:26,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:26,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:26,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785502756] [2021-08-21 17:33:26,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:26,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:26,086 INFO L87 Difference]: Start difference. First operand 610 states and 1342 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:26,158 INFO L93 Difference]: Finished difference Result 726 states and 1537 transitions. [2021-08-21 17:33:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:33:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:26,161 INFO L225 Difference]: With dead ends: 726 [2021-08-21 17:33:26,161 INFO L226 Difference]: Without dead ends: 725 [2021-08-21 17:33:26,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-08-21 17:33:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 673. [2021-08-21 17:33:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 2.1904761904761907) internal successors, (1472), 672 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1472 transitions. [2021-08-21 17:33:26,169 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1472 transitions. Word has length 18 [2021-08-21 17:33:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:26,169 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1472 transitions. [2021-08-21 17:33:26,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1472 transitions. [2021-08-21 17:33:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:26,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:26,170 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:26,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:26,387 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 17:33:26,387 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash -486149991, now seen corresponding path program 44 times [2021-08-21 17:33:26,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:26,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539975015] [2021-08-21 17:33:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:26,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:26,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:26,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539975015] [2021-08-21 17:33:26,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539975015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:26,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246778376] [2021-08-21 17:33:26,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:26,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:26,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:26,437 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 17:33:26,438 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 17:33:26,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:26,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:26,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246778376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:26,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:26,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:26,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480474477] [2021-08-21 17:33:26,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:26,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:26,768 INFO L87 Difference]: Start difference. First operand 673 states and 1472 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:26,807 INFO L93 Difference]: Finished difference Result 723 states and 1513 transitions. [2021-08-21 17:33:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:26,809 INFO L225 Difference]: With dead ends: 723 [2021-08-21 17:33:26,809 INFO L226 Difference]: Without dead ends: 723 [2021-08-21 17:33:26,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-08-21 17:33:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 665. [2021-08-21 17:33:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1792168674698793) internal successors, (1447), 664 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1447 transitions. [2021-08-21 17:33:26,817 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1447 transitions. Word has length 18 [2021-08-21 17:33:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:26,817 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1447 transitions. [2021-08-21 17:33:26,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1447 transitions. [2021-08-21 17:33:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:26,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:26,818 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:26,834 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 17:33:27,034 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 17:33:27,034 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1224463317, now seen corresponding path program 45 times [2021-08-21 17:33:27,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:27,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308688744] [2021-08-21 17:33:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:27,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:27,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:27,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308688744] [2021-08-21 17:33:27,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308688744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:27,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464394417] [2021-08-21 17:33:27,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:27,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:27,092 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 17:33:27,093 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 17:33:27,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:33:27,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:27,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464394417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:27,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:27,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:33:27,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101993879] [2021-08-21 17:33:27,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:27,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:27,440 INFO L87 Difference]: Start difference. First operand 665 states and 1447 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:27,500 INFO L93 Difference]: Finished difference Result 765 states and 1590 transitions. [2021-08-21 17:33:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:27,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:27,502 INFO L225 Difference]: With dead ends: 765 [2021-08-21 17:33:27,502 INFO L226 Difference]: Without dead ends: 765 [2021-08-21 17:33:27,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-08-21 17:33:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 620. [2021-08-21 17:33:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.1760904684975766) internal successors, (1347), 619 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1347 transitions. [2021-08-21 17:33:27,510 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1347 transitions. Word has length 18 [2021-08-21 17:33:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:27,510 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1347 transitions. [2021-08-21 17:33:27,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1347 transitions. [2021-08-21 17:33:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:27,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:27,511 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:27,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:27,728 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 17:33:27,728 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1581098983, now seen corresponding path program 46 times [2021-08-21 17:33:27,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:27,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9840906] [2021-08-21 17:33:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:27,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:27,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:27,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9840906] [2021-08-21 17:33:27,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9840906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:27,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244693273] [2021-08-21 17:33:27,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:27,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:27,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:27,787 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 17:33:27,788 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 17:33:28,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:28,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244693273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:28,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:28,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:33:28,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669410960] [2021-08-21 17:33:28,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:28,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:28,127 INFO L87 Difference]: Start difference. First operand 620 states and 1347 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:28,193 INFO L93 Difference]: Finished difference Result 930 states and 1975 transitions. [2021-08-21 17:33:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:28,195 INFO L225 Difference]: With dead ends: 930 [2021-08-21 17:33:28,195 INFO L226 Difference]: Without dead ends: 930 [2021-08-21 17:33:28,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:33:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-21 17:33:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 856. [2021-08-21 17:33:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.1777777777777776) internal successors, (1862), 855 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1862 transitions. [2021-08-21 17:33:28,205 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1862 transitions. Word has length 18 [2021-08-21 17:33:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:28,205 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1862 transitions. [2021-08-21 17:33:28,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1862 transitions. [2021-08-21 17:33:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:28,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:28,206 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:28,223 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 17:33:28,422 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 17:33:28,423 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1640782933, now seen corresponding path program 47 times [2021-08-21 17:33:28,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:28,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301016887] [2021-08-21 17:33:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:28,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:28,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:28,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301016887] [2021-08-21 17:33:28,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301016887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:28,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719705298] [2021-08-21 17:33:28,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:28,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:28,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:28,489 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 17:33:28,490 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 17:33:28,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:33:28,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:28,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:28,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:28,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719705298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:28,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:28,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:33:28,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53317948] [2021-08-21 17:33:28,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:28,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:28,857 INFO L87 Difference]: Start difference. First operand 856 states and 1862 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:28,971 INFO L93 Difference]: Finished difference Result 1192 states and 2541 transitions. [2021-08-21 17:33:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:28,974 INFO L225 Difference]: With dead ends: 1192 [2021-08-21 17:33:28,974 INFO L226 Difference]: Without dead ends: 1192 [2021-08-21 17:33:28,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:33:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-08-21 17:33:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1096. [2021-08-21 17:33:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.1780821917808217) internal successors, (2385), 1095 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 2385 transitions. [2021-08-21 17:33:28,986 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 2385 transitions. Word has length 18 [2021-08-21 17:33:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:28,986 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 2385 transitions. [2021-08-21 17:33:28,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 2385 transitions. [2021-08-21 17:33:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:28,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:28,988 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:29,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 17:33:29,204 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 17:33:29,204 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash -667075315, now seen corresponding path program 48 times [2021-08-21 17:33:29,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:29,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152695572] [2021-08-21 17:33:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:29,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:29,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:29,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152695572] [2021-08-21 17:33:29,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152695572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:29,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461022090] [2021-08-21 17:33:29,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:29,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:29,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:29,256 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 17:33:29,275 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 17:33:29,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:33:29,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461022090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:29,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:29,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 17:33:29,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429853718] [2021-08-21 17:33:29,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:33:29,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:33:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:33:29,628 INFO L87 Difference]: Start difference. First operand 1096 states and 2385 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:29,702 INFO L93 Difference]: Finished difference Result 1396 states and 3009 transitions. [2021-08-21 17:33:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:33:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 17:33:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:29,706 INFO L225 Difference]: With dead ends: 1396 [2021-08-21 17:33:29,706 INFO L226 Difference]: Without dead ends: 1394 [2021-08-21 17:33:29,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-08-21 17:33:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1367. [2021-08-21 17:33:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 2.1830161054172765) internal successors, (2982), 1366 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2982 transitions. [2021-08-21 17:33:29,722 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2982 transitions. Word has length 18 [2021-08-21 17:33:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:29,723 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 2982 transitions. [2021-08-21 17:33:29,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2982 transitions. [2021-08-21 17:33:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:29,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:29,724 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:29,741 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 17:33:29,940 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 17:33:29,941 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash -498128435, now seen corresponding path program 49 times [2021-08-21 17:33:29,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:29,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279203198] [2021-08-21 17:33:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:29,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:29,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:29,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279203198] [2021-08-21 17:33:29,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279203198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:29,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965463749] [2021-08-21 17:33:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:29,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:29,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:29,995 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 17:33:29,996 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 17:33:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:30,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965463749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:30,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:30,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:30,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771477485] [2021-08-21 17:33:30,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:30,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:30,391 INFO L87 Difference]: Start difference. First operand 1367 states and 2982 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:30,478 INFO L93 Difference]: Finished difference Result 1698 states and 3655 transitions. [2021-08-21 17:33:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:33:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-08-21 17:33:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:30,483 INFO L225 Difference]: With dead ends: 1698 [2021-08-21 17:33:30,483 INFO L226 Difference]: Without dead ends: 1698 [2021-08-21 17:33:30,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-08-21 17:33:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1557. [2021-08-21 17:33:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 2.18573264781491) internal successors, (3401), 1556 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 3401 transitions. [2021-08-21 17:33:30,503 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 3401 transitions. Word has length 18 [2021-08-21 17:33:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:30,503 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 3401 transitions. [2021-08-21 17:33:30,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 3401 transitions. [2021-08-21 17:33:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:30,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:30,505 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:30,522 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 17:33:30,722 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 17:33:30,722 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash 595963153, now seen corresponding path program 50 times [2021-08-21 17:33:30,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:30,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961404787] [2021-08-21 17:33:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:30,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:30,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:30,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961404787] [2021-08-21 17:33:30,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961404787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:30,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302117719] [2021-08-21 17:33:30,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:30,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:30,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:30,780 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 17:33:30,781 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 17:33:31,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:31,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:31,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302117719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:31,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:33:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91547150] [2021-08-21 17:33:31,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:31,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:31,092 INFO L87 Difference]: Start difference. First operand 1557 states and 3401 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:31,181 INFO L93 Difference]: Finished difference Result 1952 states and 4171 transitions. [2021-08-21 17:33:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:33:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:31,187 INFO L225 Difference]: With dead ends: 1952 [2021-08-21 17:33:31,187 INFO L226 Difference]: Without dead ends: 1952 [2021-08-21 17:33:31,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-08-21 17:33:31,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1049. [2021-08-21 17:33:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.1727099236641223) internal successors, (2277), 1048 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2277 transitions. [2021-08-21 17:33:31,203 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2277 transitions. Word has length 18 [2021-08-21 17:33:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:31,203 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 2277 transitions. [2021-08-21 17:33:31,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2277 transitions. [2021-08-21 17:33:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:31,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:31,204 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:31,221 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 17:33:31,406 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 17:33:31,406 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash -477122227, now seen corresponding path program 51 times [2021-08-21 17:33:31,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:31,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292129534] [2021-08-21 17:33:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:31,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:31,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:31,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292129534] [2021-08-21 17:33:31,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292129534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:31,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903219081] [2021-08-21 17:33:31,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:31,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:31,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:31,480 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 17:33:31,481 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 17:33:31,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:33:31,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:31,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:31,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903219081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:31,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:31,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:33:31,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349814197] [2021-08-21 17:33:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:31,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:31,865 INFO L87 Difference]: Start difference. First operand 1049 states and 2277 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:31,978 INFO L93 Difference]: Finished difference Result 1282 states and 2741 transitions. [2021-08-21 17:33:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:31,979 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:31,981 INFO L225 Difference]: With dead ends: 1282 [2021-08-21 17:33:31,981 INFO L226 Difference]: Without dead ends: 1282 [2021-08-21 17:33:31,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:33:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-08-21 17:33:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1060. [2021-08-21 17:33:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.174693106704438) internal successors, (2303), 1059 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 2303 transitions. [2021-08-21 17:33:31,993 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 2303 transitions. Word has length 18 [2021-08-21 17:33:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:31,993 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 2303 transitions. [2021-08-21 17:33:31,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 2303 transitions. [2021-08-21 17:33:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:31,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:31,994 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:32,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:32,211 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 17:33:32,211 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1328610585, now seen corresponding path program 52 times [2021-08-21 17:33:32,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:32,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508954168] [2021-08-21 17:33:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:32,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:32,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:32,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508954168] [2021-08-21 17:33:32,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508954168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:32,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434732970] [2021-08-21 17:33:32,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:32,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:32,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:32,270 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 17:33:32,271 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 17:33:32,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:32,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:32,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:32,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:32,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434732970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:32,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:32,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:32,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599855850] [2021-08-21 17:33:32,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:32,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:32,584 INFO L87 Difference]: Start difference. First operand 1060 states and 2303 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:32,655 INFO L93 Difference]: Finished difference Result 1131 states and 2398 transitions. [2021-08-21 17:33:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:33:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:32,657 INFO L225 Difference]: With dead ends: 1131 [2021-08-21 17:33:32,657 INFO L226 Difference]: Without dead ends: 1129 [2021-08-21 17:33:32,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-08-21 17:33:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1031. [2021-08-21 17:33:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.1679611650485437) internal successors, (2233), 1030 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2233 transitions. [2021-08-21 17:33:32,669 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2233 transitions. Word has length 18 [2021-08-21 17:33:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:32,669 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 2233 transitions. [2021-08-21 17:33:32,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2233 transitions. [2021-08-21 17:33:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:32,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:32,670 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:32,687 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 17:33:32,887 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 17:33:32,887 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1248013005, now seen corresponding path program 53 times [2021-08-21 17:33:32,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:32,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473428544] [2021-08-21 17:33:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:32,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:32,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:32,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473428544] [2021-08-21 17:33:32,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473428544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:32,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237387658] [2021-08-21 17:33:32,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:32,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:32,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:32,947 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 17:33:32,948 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 17:33:33,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:33:33,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:33,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:33,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237387658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:33,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:33,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:33,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928719922] [2021-08-21 17:33:33,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:33,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:33,274 INFO L87 Difference]: Start difference. First operand 1031 states and 2233 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:33,333 INFO L93 Difference]: Finished difference Result 1096 states and 2311 transitions. [2021-08-21 17:33:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:33:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:33,335 INFO L225 Difference]: With dead ends: 1096 [2021-08-21 17:33:33,335 INFO L226 Difference]: Without dead ends: 1096 [2021-08-21 17:33:33,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-08-21 17:33:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1029. [2021-08-21 17:33:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.164396887159533) internal successors, (2225), 1028 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2225 transitions. [2021-08-21 17:33:33,347 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2225 transitions. Word has length 18 [2021-08-21 17:33:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:33,348 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 2225 transitions. [2021-08-21 17:33:33,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2225 transitions. [2021-08-21 17:33:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:33,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:33,349 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:33,380 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 17:33:33,565 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 17:33:33,565 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1336340983, now seen corresponding path program 54 times [2021-08-21 17:33:33,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:33,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133546386] [2021-08-21 17:33:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:33,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:33,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:33,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133546386] [2021-08-21 17:33:33,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133546386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:33,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466390183] [2021-08-21 17:33:33,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:33,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:33,641 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 17:33:33,642 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 17:33:34,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:33:34,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:34,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466390183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:34,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:34,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:33:34,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085756345] [2021-08-21 17:33:34,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:34,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:34,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:34,063 INFO L87 Difference]: Start difference. First operand 1029 states and 2225 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:34,125 INFO L93 Difference]: Finished difference Result 1068 states and 2252 transitions. [2021-08-21 17:33:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:33:34,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:34,127 INFO L225 Difference]: With dead ends: 1068 [2021-08-21 17:33:34,127 INFO L226 Difference]: Without dead ends: 1068 [2021-08-21 17:33:34,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-08-21 17:33:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1011. [2021-08-21 17:33:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.1574257425742576) internal successors, (2179), 1010 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2179 transitions. [2021-08-21 17:33:34,137 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2179 transitions. Word has length 18 [2021-08-21 17:33:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:34,138 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 2179 transitions. [2021-08-21 17:33:34,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2179 transitions. [2021-08-21 17:33:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:34,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:34,139 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:34,180 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 17:33:34,356 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 17:33:34,356 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 153064013, now seen corresponding path program 55 times [2021-08-21 17:33:34,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:34,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626828408] [2021-08-21 17:33:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:34,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:34,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:34,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626828408] [2021-08-21 17:33:34,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626828408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:34,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077049382] [2021-08-21 17:33:34,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:34,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:34,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:34,461 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 17:33:34,545 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 17:33:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:34,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:34,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077049382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:34,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:34,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:34,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100500197] [2021-08-21 17:33:34,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:34,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:34,925 INFO L87 Difference]: Start difference. First operand 1011 states and 2179 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:35,003 INFO L93 Difference]: Finished difference Result 1113 states and 2335 transitions. [2021-08-21 17:33:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:33:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:35,005 INFO L225 Difference]: With dead ends: 1113 [2021-08-21 17:33:35,005 INFO L226 Difference]: Without dead ends: 1113 [2021-08-21 17:33:35,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-21 17:33:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 984. [2021-08-21 17:33:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 2.154628687690743) internal successors, (2118), 983 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2118 transitions. [2021-08-21 17:33:35,016 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2118 transitions. Word has length 18 [2021-08-21 17:33:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:35,017 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 2118 transitions. [2021-08-21 17:33:35,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2118 transitions. [2021-08-21 17:33:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:35,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:35,018 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:35,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 17:33:35,233 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 17:33:35,233 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -920021367, now seen corresponding path program 56 times [2021-08-21 17:33:35,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:35,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383851534] [2021-08-21 17:33:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:35,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:35,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:35,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383851534] [2021-08-21 17:33:35,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383851534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:35,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156967747] [2021-08-21 17:33:35,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:35,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:35,295 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 17:33:35,296 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 17:33:35,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:35,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:35,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156967747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:35,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:35,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:35,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431233455] [2021-08-21 17:33:35,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:35,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:35,737 INFO L87 Difference]: Start difference. First operand 984 states and 2118 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:35,863 INFO L93 Difference]: Finished difference Result 1213 states and 2568 transitions. [2021-08-21 17:33:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:33:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:35,865 INFO L225 Difference]: With dead ends: 1213 [2021-08-21 17:33:35,865 INFO L226 Difference]: Without dead ends: 1213 [2021-08-21 17:33:35,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:33:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-08-21 17:33:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1032. [2021-08-21 17:33:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.1561590688651795) internal successors, (2223), 1031 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2223 transitions. [2021-08-21 17:33:35,877 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2223 transitions. Word has length 18 [2021-08-21 17:33:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:35,877 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 2223 transitions. [2021-08-21 17:33:35,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2223 transitions. [2021-08-21 17:33:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:35,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:35,878 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:35,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:36,093 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 17:33:36,094 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash 174070221, now seen corresponding path program 57 times [2021-08-21 17:33:36,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:36,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435753147] [2021-08-21 17:33:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:36,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:36,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:36,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435753147] [2021-08-21 17:33:36,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435753147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:36,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802414085] [2021-08-21 17:33:36,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:36,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:36,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:36,193 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 17:33:36,256 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 17:33:36,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:33:36,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:36,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802414085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:36,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:36,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:36,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105147132] [2021-08-21 17:33:36,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:36,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:36,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:36,654 INFO L87 Difference]: Start difference. First operand 1032 states and 2223 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:36,870 INFO L93 Difference]: Finished difference Result 1301 states and 2760 transitions. [2021-08-21 17:33:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:33:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:36,872 INFO L225 Difference]: With dead ends: 1301 [2021-08-21 17:33:36,872 INFO L226 Difference]: Without dead ends: 1301 [2021-08-21 17:33:36,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:33:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-08-21 17:33:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1214. [2021-08-21 17:33:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.14921681780709) internal successors, (2607), 1213 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2607 transitions. [2021-08-21 17:33:36,886 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2607 transitions. Word has length 18 [2021-08-21 17:33:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:36,886 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2607 transitions. [2021-08-21 17:33:36,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2607 transitions. [2021-08-21 17:33:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:36,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:36,887 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:36,904 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 17:33:37,101 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 17:33:37,102 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:37,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1897625835, now seen corresponding path program 58 times [2021-08-21 17:33:37,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:37,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755642076] [2021-08-21 17:33:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:37,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:37,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:37,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755642076] [2021-08-21 17:33:37,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755642076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:37,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634103336] [2021-08-21 17:33:37,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:37,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:37,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:37,159 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 17:33:37,195 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 17:33:37,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:37,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:37,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:37,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634103336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:37,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:37,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:37,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007653791] [2021-08-21 17:33:37,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:37,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:37,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:37,610 INFO L87 Difference]: Start difference. First operand 1214 states and 2607 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:37,699 INFO L93 Difference]: Finished difference Result 1318 states and 2786 transitions. [2021-08-21 17:33:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:33:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 18 [2021-08-21 17:33:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:37,701 INFO L225 Difference]: With dead ends: 1318 [2021-08-21 17:33:37,701 INFO L226 Difference]: Without dead ends: 1316 [2021-08-21 17:33:37,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:33:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-08-21 17:33:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1151. [2021-08-21 17:33:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.1469565217391304) internal successors, (2469), 1150 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2469 transitions. [2021-08-21 17:33:37,712 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2469 transitions. Word has length 18 [2021-08-21 17:33:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:37,712 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 2469 transitions. [2021-08-21 17:33:37,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17:33:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2469 transitions. [2021-08-21 17:33:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:37,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:37,715 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:37,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:37,931 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 17:33:37,931 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:37,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1707672747, now seen corresponding path program 59 times [2021-08-21 17:33:37,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:37,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946571565] [2021-08-21 17:33:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:37,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:37,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:37,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946571565] [2021-08-21 17:33:37,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946571565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:37,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946315501] [2021-08-21 17:33:37,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:37,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:37,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:38,000 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 17:33:38,001 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 17:33:38,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:33:38,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:38,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:38,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946315501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:38,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:38,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:33:38,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058499163] [2021-08-21 17:33:38,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:38,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:38,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:38,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:38,432 INFO L87 Difference]: Start difference. First operand 1151 states and 2469 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:38,541 INFO L93 Difference]: Finished difference Result 1530 states and 3235 transitions. [2021-08-21 17:33:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:38,543 INFO L225 Difference]: With dead ends: 1530 [2021-08-21 17:33:38,543 INFO L226 Difference]: Without dead ends: 1530 [2021-08-21 17:33:38,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:33:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-08-21 17:33:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1360. [2021-08-21 17:33:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.1456953642384105) internal successors, (2916), 1359 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2916 transitions. [2021-08-21 17:33:38,600 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2916 transitions. Word has length 18 [2021-08-21 17:33:38,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:38,600 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2916 transitions. [2021-08-21 17:33:38,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2916 transitions. [2021-08-21 17:33:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:38,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:38,601 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:38,644 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 17:33:38,817 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 17:33:38,818 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2144395409, now seen corresponding path program 60 times [2021-08-21 17:33:38,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:38,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292970526] [2021-08-21 17:33:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:38,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:38,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:38,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292970526] [2021-08-21 17:33:38,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292970526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:38,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321992797] [2021-08-21 17:33:38,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:38,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:38,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:38,889 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 17:33:38,956 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 17:33:39,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:39,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:39,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321992797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:39,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:39,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:39,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10026936] [2021-08-21 17:33:39,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:39,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:39,366 INFO L87 Difference]: Start difference. First operand 1360 states and 2916 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:39,465 INFO L93 Difference]: Finished difference Result 1649 states and 3477 transitions. [2021-08-21 17:33:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:33:39,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:39,467 INFO L225 Difference]: With dead ends: 1649 [2021-08-21 17:33:39,467 INFO L226 Difference]: Without dead ends: 1649 [2021-08-21 17:33:39,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:33:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-08-21 17:33:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1102. [2021-08-21 17:33:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 2.147138964577657) internal successors, (2364), 1101 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 2364 transitions. [2021-08-21 17:33:39,482 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 2364 transitions. Word has length 18 [2021-08-21 17:33:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:39,482 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 2364 transitions. [2021-08-21 17:33:39,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 2364 transitions. [2021-08-21 17:33:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:39,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:39,484 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:39,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:39,700 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 17:33:39,701 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1056480299, now seen corresponding path program 61 times [2021-08-21 17:33:39,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:39,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147390510] [2021-08-21 17:33:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:39,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:39,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:39,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147390510] [2021-08-21 17:33:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147390510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:39,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968825512] [2021-08-21 17:33:39,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:39,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:39,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:39,785 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 17:33:39,786 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 17:33:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:40,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968825512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:40,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:40,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:40,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343184718] [2021-08-21 17:33:40,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:40,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:40,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:40,248 INFO L87 Difference]: Start difference. First operand 1102 states and 2364 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:40,396 INFO L93 Difference]: Finished difference Result 1339 states and 2830 transitions. [2021-08-21 17:33:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:33:40,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:40,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:40,399 INFO L225 Difference]: With dead ends: 1339 [2021-08-21 17:33:40,399 INFO L226 Difference]: Without dead ends: 1339 [2021-08-21 17:33:40,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:33:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-08-21 17:33:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1108. [2021-08-21 17:33:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.147244805781391) internal successors, (2377), 1107 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 2377 transitions. [2021-08-21 17:33:40,411 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 2377 transitions. Word has length 18 [2021-08-21 17:33:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:40,411 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 2377 transitions. [2021-08-21 17:33:40,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 2377 transitions. [2021-08-21 17:33:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:40,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:40,413 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:40,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:40,626 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 17:33:40,627 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:40,627 INFO L82 PathProgramCache]: Analyzing trace with hash 890834739, now seen corresponding path program 62 times [2021-08-21 17:33:40,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:40,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409027324] [2021-08-21 17:33:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:40,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:40,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:40,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409027324] [2021-08-21 17:33:40,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409027324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:40,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741274605] [2021-08-21 17:33:40,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:40,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:40,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:40,690 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:40,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 17:33:41,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:41,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:41,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741274605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:41,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:41,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:41,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895464864] [2021-08-21 17:33:41,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:41,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:41,151 INFO L87 Difference]: Start difference. First operand 1108 states and 2377 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:41,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:41,232 INFO L93 Difference]: Finished difference Result 1172 states and 2464 transitions. [2021-08-21 17:33:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:41,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:41,261 INFO L225 Difference]: With dead ends: 1172 [2021-08-21 17:33:41,261 INFO L226 Difference]: Without dead ends: 1170 [2021-08-21 17:33:41,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:33:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-08-21 17:33:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1132. [2021-08-21 17:33:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 2.145888594164456) internal successors, (2427), 1131 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 2427 transitions. [2021-08-21 17:33:41,274 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 2427 transitions. Word has length 18 [2021-08-21 17:33:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:41,274 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 2427 transitions. [2021-08-21 17:33:41,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 2427 transitions. [2021-08-21 17:33:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:41,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:41,276 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:41,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:41,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 17:33:41,476 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash -827508967, now seen corresponding path program 63 times [2021-08-21 17:33:41,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:41,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584608963] [2021-08-21 17:33:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:41,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:41,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:41,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584608963] [2021-08-21 17:33:41,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584608963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:41,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565014570] [2021-08-21 17:33:41,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:41,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:41,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:41,572 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:41,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 17:33:41,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:33:41,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:41,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:41,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:42,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565014570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:42,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:42,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:33:42,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237608163] [2021-08-21 17:33:42,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:42,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:42,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:42,014 INFO L87 Difference]: Start difference. First operand 1132 states and 2427 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:42,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:42,066 INFO L93 Difference]: Finished difference Result 1197 states and 2516 transitions. [2021-08-21 17:33:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:42,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:42,067 INFO L225 Difference]: With dead ends: 1197 [2021-08-21 17:33:42,067 INFO L226 Difference]: Without dead ends: 1197 [2021-08-21 17:33:42,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-08-21 17:33:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1133. [2021-08-21 17:33:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.145759717314488) internal successors, (2429), 1132 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2429 transitions. [2021-08-21 17:33:42,093 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2429 transitions. Word has length 18 [2021-08-21 17:33:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:42,093 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2429 transitions. [2021-08-21 17:33:42,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2429 transitions. [2021-08-21 17:33:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:42,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:42,094 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:42,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:42,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:42,319 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash 883104341, now seen corresponding path program 64 times [2021-08-21 17:33:42,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:42,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203997839] [2021-08-21 17:33:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:42,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:42,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:42,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203997839] [2021-08-21 17:33:42,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203997839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:42,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226664778] [2021-08-21 17:33:42,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:42,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:42,382 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:42,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 17:33:42,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:42,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:42,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226664778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:42,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:42,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:33:42,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041745583] [2021-08-21 17:33:42,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:42,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:42,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:42,894 INFO L87 Difference]: Start difference. First operand 1133 states and 2429 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:42,983 INFO L93 Difference]: Finished difference Result 1202 states and 2523 transitions. [2021-08-21 17:33:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:33:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:42,998 INFO L225 Difference]: With dead ends: 1202 [2021-08-21 17:33:42,998 INFO L226 Difference]: Without dead ends: 1202 [2021-08-21 17:33:42,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:33:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-08-21 17:33:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1128. [2021-08-21 17:33:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 2.1437444543034605) internal successors, (2416), 1127 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 2416 transitions. [2021-08-21 17:33:43,009 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 2416 transitions. Word has length 18 [2021-08-21 17:33:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:43,009 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 2416 transitions. [2021-08-21 17:33:43,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 2416 transitions. [2021-08-21 17:33:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:43,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:43,010 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:43,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:43,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 17:33:43,230 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:43,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1922457959, now seen corresponding path program 65 times [2021-08-21 17:33:43,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:43,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787432612] [2021-08-21 17:33:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:43,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:43,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:43,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787432612] [2021-08-21 17:33:43,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787432612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:43,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55241442] [2021-08-21 17:33:43,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:43,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:43,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:43,288 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:43,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 17:33:43,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:33:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:43,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:43,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55241442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:43,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:43,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 17:33:43,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519819360] [2021-08-21 17:33:43,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:33:43,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:33:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:33:43,773 INFO L87 Difference]: Start difference. First operand 1128 states and 2416 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:43,821 INFO L93 Difference]: Finished difference Result 1468 states and 3108 transitions. [2021-08-21 17:33:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:33:43,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:43,837 INFO L225 Difference]: With dead ends: 1468 [2021-08-21 17:33:43,837 INFO L226 Difference]: Without dead ends: 1468 [2021-08-21 17:33:43,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-08-21 17:33:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1444. [2021-08-21 17:33:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.135135135135135) internal successors, (3081), 1443 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 3081 transitions. [2021-08-21 17:33:43,863 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 3081 transitions. Word has length 18 [2021-08-21 17:33:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:43,863 INFO L470 AbstractCegarLoop]: Abstraction has 1444 states and 3081 transitions. [2021-08-21 17:33:43,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 3081 transitions. [2021-08-21 17:33:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:43,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:43,864 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:43,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:44,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 17:33:44,097 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1299423957, now seen corresponding path program 66 times [2021-08-21 17:33:44,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:44,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070432535] [2021-08-21 17:33:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:44,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:44,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:44,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070432535] [2021-08-21 17:33:44,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070432535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:44,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294362716] [2021-08-21 17:33:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:44,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:44,160 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 17:33:44,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:44,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:44,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:44,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:44,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294362716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:44,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:44,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:44,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527138530] [2021-08-21 17:33:44,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:44,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:44,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:44,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:44,676 INFO L87 Difference]: Start difference. First operand 1444 states and 3081 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:44,760 INFO L93 Difference]: Finished difference Result 1518 states and 3208 transitions. [2021-08-21 17:33:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:33:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:44,762 INFO L225 Difference]: With dead ends: 1518 [2021-08-21 17:33:44,762 INFO L226 Difference]: Without dead ends: 1518 [2021-08-21 17:33:44,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:33:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-08-21 17:33:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1452. [2021-08-21 17:33:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 2.1343900758097862) internal successors, (3097), 1451 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 3097 transitions. [2021-08-21 17:33:44,776 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 3097 transitions. Word has length 18 [2021-08-21 17:33:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:44,776 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 3097 transitions. [2021-08-21 17:33:44,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 3097 transitions. [2021-08-21 17:33:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:44,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:44,777 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:44,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:44,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 17:33:44,994 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:44,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1901451751, now seen corresponding path program 67 times [2021-08-21 17:33:44,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:44,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050889581] [2021-08-21 17:33:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:44,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:45,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:45,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050889581] [2021-08-21 17:33:45,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050889581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:45,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914214949] [2021-08-21 17:33:45,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:45,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:45,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:45,093 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 17:33:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:45,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914214949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:45,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:45,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:45,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091721152] [2021-08-21 17:33:45,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:45,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:45,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:45,568 INFO L87 Difference]: Start difference. First operand 1452 states and 3097 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:45,687 INFO L93 Difference]: Finished difference Result 1610 states and 3410 transitions. [2021-08-21 17:33:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:33:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:45,689 INFO L225 Difference]: With dead ends: 1610 [2021-08-21 17:33:45,689 INFO L226 Difference]: Without dead ends: 1610 [2021-08-21 17:33:45,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:33:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-08-21 17:33:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1566. [2021-08-21 17:33:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.127156549520767) internal successors, (3329), 1565 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3329 transitions. [2021-08-21 17:33:45,703 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3329 transitions. Word has length 18 [2021-08-21 17:33:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:45,703 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 3329 transitions. [2021-08-21 17:33:45,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3329 transitions. [2021-08-21 17:33:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:45,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:45,705 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:45,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:45,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 17:33:45,921 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1950616405, now seen corresponding path program 68 times [2021-08-21 17:33:45,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:45,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782815775] [2021-08-21 17:33:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:45,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:46,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:46,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782815775] [2021-08-21 17:33:46,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782815775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:46,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509257249] [2021-08-21 17:33:46,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:46,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:46,039 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:46,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 17:33:46,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:46,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509257249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:46,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:46,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 17:33:46,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589867970] [2021-08-21 17:33:46,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:46,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:46,538 INFO L87 Difference]: Start difference. First operand 1566 states and 3329 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:46,719 INFO L93 Difference]: Finished difference Result 1773 states and 3743 transitions. [2021-08-21 17:33:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:33:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:33:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:46,721 INFO L225 Difference]: With dead ends: 1773 [2021-08-21 17:33:46,721 INFO L226 Difference]: Without dead ends: 1773 [2021-08-21 17:33:46,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-08-21 17:33:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1633. [2021-08-21 17:33:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 2.121936274509804) internal successors, (3463), 1632 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 3463 transitions. [2021-08-21 17:33:46,737 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 3463 transitions. Word has length 18 [2021-08-21 17:33:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:46,737 INFO L470 AbstractCegarLoop]: Abstraction has 1633 states and 3463 transitions. [2021-08-21 17:33:46,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 3463 transitions. [2021-08-21 17:33:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:46,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:46,738 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:46,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:46,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:46,955 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:46,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1389986291, now seen corresponding path program 69 times [2021-08-21 17:33:46,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:46,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417254793] [2021-08-21 17:33:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:46,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:47,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:47,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417254793] [2021-08-21 17:33:47,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417254793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:47,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486581953] [2021-08-21 17:33:47,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:47,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:47,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:47,062 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:47,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 17:33:47,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:33:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:47,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486581953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:47,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:47,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-08-21 17:33:47,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549881273] [2021-08-21 17:33:47,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:47,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:47,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:47,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:47,556 INFO L87 Difference]: Start difference. First operand 1633 states and 3463 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:47,667 INFO L93 Difference]: Finished difference Result 1681 states and 3511 transitions. [2021-08-21 17:33:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:33:47,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 17:33:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:47,669 INFO L225 Difference]: With dead ends: 1681 [2021-08-21 17:33:47,669 INFO L226 Difference]: Without dead ends: 1679 [2021-08-21 17:33:47,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:33:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-08-21 17:33:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1579. [2021-08-21 17:33:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 2.120405576679341) internal successors, (3346), 1578 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 3346 transitions. [2021-08-21 17:33:47,685 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 3346 transitions. Word has length 18 [2021-08-21 17:33:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:47,685 INFO L470 AbstractCegarLoop]: Abstraction has 1579 states and 3346 transitions. [2021-08-21 17:33:47,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 3346 transitions. [2021-08-21 17:33:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:47,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:47,687 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:47,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:47,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:47,903 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:47,904 INFO L82 PathProgramCache]: Analyzing trace with hash -548840755, now seen corresponding path program 70 times [2021-08-21 17:33:47,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:47,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318508290] [2021-08-21 17:33:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:47,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:48,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:48,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318508290] [2021-08-21 17:33:48,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318508290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:48,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192587095] [2021-08-21 17:33:48,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:48,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:48,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:48,004 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:48,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 17:33:48,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:48,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192587095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:48,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:48,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 17:33:48,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203307287] [2021-08-21 17:33:48,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:48,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:48,511 INFO L87 Difference]: Start difference. First operand 1579 states and 3346 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:48,879 INFO L93 Difference]: Finished difference Result 2302 states and 4804 transitions. [2021-08-21 17:33:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:33:48,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 17:33:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:48,882 INFO L225 Difference]: With dead ends: 2302 [2021-08-21 17:33:48,882 INFO L226 Difference]: Without dead ends: 2302 [2021-08-21 17:33:48,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:33:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-08-21 17:33:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1734. [2021-08-21 17:33:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.115406809001731) internal successors, (3666), 1733 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 3666 transitions. [2021-08-21 17:33:48,923 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 3666 transitions. Word has length 18 [2021-08-21 17:33:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:48,923 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 3666 transitions. [2021-08-21 17:33:48,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 3666 transitions. [2021-08-21 17:33:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:48,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:48,926 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:48,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:49,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:49,142 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1393812207, now seen corresponding path program 71 times [2021-08-21 17:33:49,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:49,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880847415] [2021-08-21 17:33:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:49,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:49,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:49,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880847415] [2021-08-21 17:33:49,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880847415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:49,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081773181] [2021-08-21 17:33:49,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:49,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:49,219 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:49,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 17:33:49,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:33:49,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:49,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:49,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081773181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:49,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:49,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 17:33:49,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514331502] [2021-08-21 17:33:49,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:49,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:49,705 INFO L87 Difference]: Start difference. First operand 1734 states and 3666 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:49,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:49,917 INFO L93 Difference]: Finished difference Result 1929 states and 4048 transitions. [2021-08-21 17:33:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:33:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 17:33:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:49,919 INFO L225 Difference]: With dead ends: 1929 [2021-08-21 17:33:49,919 INFO L226 Difference]: Without dead ends: 1929 [2021-08-21 17:33:49,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:33:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-08-21 17:33:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1725. [2021-08-21 17:33:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 2.117169373549884) internal successors, (3650), 1724 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 3650 transitions. [2021-08-21 17:33:49,938 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 3650 transitions. Word has length 18 [2021-08-21 17:33:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:49,938 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 3650 transitions. [2021-08-21 17:33:49,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 3650 transitions. [2021-08-21 17:33:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:49,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:49,940 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:49,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:50,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 17:33:50,157 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1836711347, now seen corresponding path program 72 times [2021-08-21 17:33:50,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:50,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696789532] [2021-08-21 17:33:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:50,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:50,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:50,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696789532] [2021-08-21 17:33:50,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696789532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:50,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286242729] [2021-08-21 17:33:50,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:50,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:50,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:50,226 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:50,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 17:33:50,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:33:50,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:50,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:50,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286242729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:50,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:50,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 17:33:50,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799182759] [2021-08-21 17:33:50,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:50,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:50,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:50,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:50,752 INFO L87 Difference]: Start difference. First operand 1725 states and 3650 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:50,990 INFO L93 Difference]: Finished difference Result 1930 states and 4060 transitions. [2021-08-21 17:33:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:33:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 17:33:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:50,992 INFO L225 Difference]: With dead ends: 1930 [2021-08-21 17:33:50,992 INFO L226 Difference]: Without dead ends: 1930 [2021-08-21 17:33:50,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:33:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-08-21 17:33:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1730. [2021-08-21 17:33:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.1168305378831693) internal successors, (3660), 1729 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 3660 transitions. [2021-08-21 17:33:51,009 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 3660 transitions. Word has length 18 [2021-08-21 17:33:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:51,009 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 3660 transitions. [2021-08-21 17:33:51,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 3660 transitions. [2021-08-21 17:33:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:51,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:51,011 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:51,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 17:33:51,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:51,227 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:51,227 INFO L82 PathProgramCache]: Analyzing trace with hash 974163047, now seen corresponding path program 73 times [2021-08-21 17:33:51,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:51,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038953977] [2021-08-21 17:33:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:51,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:51,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:51,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038953977] [2021-08-21 17:33:51,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038953977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:51,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18362352] [2021-08-21 17:33:51,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:51,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:51,308 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 17:33:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:51,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:51,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18362352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:51,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:51,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-08-21 17:33:51,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735008723] [2021-08-21 17:33:51,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:51,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:51,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:51,832 INFO L87 Difference]: Start difference. First operand 1730 states and 3660 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:51,914 INFO L93 Difference]: Finished difference Result 1878 states and 3936 transitions. [2021-08-21 17:33:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:33:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:33:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:51,917 INFO L225 Difference]: With dead ends: 1878 [2021-08-21 17:33:51,918 INFO L226 Difference]: Without dead ends: 1877 [2021-08-21 17:33:51,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-08-21 17:33:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1845. [2021-08-21 17:33:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 2.1182212581344904) internal successors, (3906), 1844 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 3906 transitions. [2021-08-21 17:33:51,943 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 3906 transitions. Word has length 18 [2021-08-21 17:33:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:51,943 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 3906 transitions. [2021-08-21 17:33:51,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 3906 transitions. [2021-08-21 17:33:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:51,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:51,946 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:51,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:52,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:52,160 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash -744180659, now seen corresponding path program 74 times [2021-08-21 17:33:52,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:52,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102830718] [2021-08-21 17:33:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:52,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:52,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:52,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102830718] [2021-08-21 17:33:52,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102830718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:52,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166016749] [2021-08-21 17:33:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:52,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:52,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:52,246 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 17:33:52,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:52,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:52,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166016749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:52,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:52,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2021-08-21 17:33:52,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72484183] [2021-08-21 17:33:52,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:33:52,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:33:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:33:52,985 INFO L87 Difference]: Start difference. First operand 1845 states and 3906 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:53,100 INFO L93 Difference]: Finished difference Result 1920 states and 4021 transitions. [2021-08-21 17:33:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:33:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:53,103 INFO L225 Difference]: With dead ends: 1920 [2021-08-21 17:33:53,103 INFO L226 Difference]: Without dead ends: 1920 [2021-08-21 17:33:53,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:33:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-08-21 17:33:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1847. [2021-08-21 17:33:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.118093174431203) internal successors, (3910), 1846 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:53,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 3910 transitions. [2021-08-21 17:33:53,127 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 3910 transitions. Word has length 18 [2021-08-21 17:33:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:53,127 INFO L470 AbstractCegarLoop]: Abstraction has 1847 states and 3910 transitions. [2021-08-21 17:33:53,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 3910 transitions. [2021-08-21 17:33:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:53,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:53,130 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:53,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 17:33:53,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 17:33:53,335 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash 966432649, now seen corresponding path program 75 times [2021-08-21 17:33:53,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:53,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986942639] [2021-08-21 17:33:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:53,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:53,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:53,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986942639] [2021-08-21 17:33:53,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986942639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:53,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112671138] [2021-08-21 17:33:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:53,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:53,413 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:53,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 17:33:53,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:33:53,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:53,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:53,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112671138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:53,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:53,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-08-21 17:33:53,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592093717] [2021-08-21 17:33:53,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:53,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:53,938 INFO L87 Difference]: Start difference. First operand 1847 states and 3910 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:54,075 INFO L93 Difference]: Finished difference Result 1957 states and 4095 transitions. [2021-08-21 17:33:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:33:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:33:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:54,077 INFO L225 Difference]: With dead ends: 1957 [2021-08-21 17:33:54,078 INFO L226 Difference]: Without dead ends: 1957 [2021-08-21 17:33:54,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:33:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-08-21 17:33:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1855. [2021-08-21 17:33:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 2.1175836030204964) internal successors, (3926), 1854 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 3926 transitions. [2021-08-21 17:33:54,096 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 3926 transitions. Word has length 18 [2021-08-21 17:33:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:54,096 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 3926 transitions. [2021-08-21 17:33:54,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 3926 transitions. [2021-08-21 17:33:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:54,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:54,098 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:54,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:54,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 17:33:54,311 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1839129651, now seen corresponding path program 76 times [2021-08-21 17:33:54,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:54,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62371772] [2021-08-21 17:33:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:54,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:54,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:54,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62371772] [2021-08-21 17:33:54,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62371772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:54,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744160846] [2021-08-21 17:33:54,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:54,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:54,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:54,408 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:54,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 17:33:54,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:54,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:54,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744160846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:54,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:54,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-08-21 17:33:54,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41224776] [2021-08-21 17:33:54,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:54,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:54,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:54,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:54,941 INFO L87 Difference]: Start difference. First operand 1855 states and 3926 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:55,074 INFO L93 Difference]: Finished difference Result 2328 states and 4882 transitions. [2021-08-21 17:33:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:33:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:33:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:55,077 INFO L225 Difference]: With dead ends: 2328 [2021-08-21 17:33:55,077 INFO L226 Difference]: Without dead ends: 2328 [2021-08-21 17:33:55,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:33:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-21 17:33:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2239. [2021-08-21 17:33:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2238 states have (on average 2.111260053619303) internal successors, (4725), 2238 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 4725 transitions. [2021-08-21 17:33:55,099 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 4725 transitions. Word has length 18 [2021-08-21 17:33:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:55,099 INFO L470 AbstractCegarLoop]: Abstraction has 2239 states and 4725 transitions. [2021-08-21 17:33:55,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 4725 transitions. [2021-08-21 17:33:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:55,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:55,101 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:55,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:55,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:55,317 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1382752265, now seen corresponding path program 77 times [2021-08-21 17:33:55,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:55,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616199088] [2021-08-21 17:33:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:55,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:55,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:55,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616199088] [2021-08-21 17:33:55,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616199088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:55,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144877590] [2021-08-21 17:33:55,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:55,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:55,386 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:55,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 17:33:55,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:33:55,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:55,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144877590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:55,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:55,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-08-21 17:33:55,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535426907] [2021-08-21 17:33:55,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:55,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:55,922 INFO L87 Difference]: Start difference. First operand 2239 states and 4725 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:56,082 INFO L93 Difference]: Finished difference Result 2351 states and 4943 transitions. [2021-08-21 17:33:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:33:56,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:33:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:56,084 INFO L225 Difference]: With dead ends: 2351 [2021-08-21 17:33:56,085 INFO L226 Difference]: Without dead ends: 2351 [2021-08-21 17:33:56,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:33:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-08-21 17:33:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2325. [2021-08-21 17:33:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 2.1075731497418246) internal successors, (4898), 2324 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 4898 transitions. [2021-08-21 17:33:56,114 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 4898 transitions. Word has length 18 [2021-08-21 17:33:56,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:56,114 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 4898 transitions. [2021-08-21 17:33:56,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 4898 transitions. [2021-08-21 17:33:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:56,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:56,117 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:56,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:56,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:56,334 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:56,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1818123443, now seen corresponding path program 78 times [2021-08-21 17:33:56,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:56,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942876860] [2021-08-21 17:33:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:56,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:56,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:56,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942876860] [2021-08-21 17:33:56,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942876860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:56,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55226927] [2021-08-21 17:33:56,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:56,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:56,411 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:56,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 17:33:56,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:56,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55226927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:56,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:56,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 17:33:56,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267076645] [2021-08-21 17:33:56,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:56,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:56,954 INFO L87 Difference]: Start difference. First operand 2325 states and 4898 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:57,152 INFO L93 Difference]: Finished difference Result 2395 states and 5031 transitions. [2021-08-21 17:33:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:33:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:33:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:57,155 INFO L225 Difference]: With dead ends: 2395 [2021-08-21 17:33:57,155 INFO L226 Difference]: Without dead ends: 2395 [2021-08-21 17:33:57,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:33:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-08-21 17:33:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2324. [2021-08-21 17:33:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.107619457597934) internal successors, (4896), 2323 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 4896 transitions. [2021-08-21 17:33:57,177 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 4896 transitions. Word has length 18 [2021-08-21 17:33:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:57,178 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 4896 transitions. [2021-08-21 17:33:57,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 4896 transitions. [2021-08-21 17:33:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:57,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:57,180 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:57,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:57,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 17:33:57,397 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:57,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2033944713, now seen corresponding path program 79 times [2021-08-21 17:33:57,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:57,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104490798] [2021-08-21 17:33:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:57,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:57,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:57,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104490798] [2021-08-21 17:33:57,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104490798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:57,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474082995] [2021-08-21 17:33:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:57,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:57,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:57,479 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:57,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 17:33:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:58,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:58,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474082995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:58,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:58,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-21 17:33:58,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362878037] [2021-08-21 17:33:58,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:58,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:58,062 INFO L87 Difference]: Start difference. First operand 2324 states and 4896 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:58,233 INFO L93 Difference]: Finished difference Result 2438 states and 5124 transitions. [2021-08-21 17:33:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:33:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:33:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:58,236 INFO L225 Difference]: With dead ends: 2438 [2021-08-21 17:33:58,236 INFO L226 Difference]: Without dead ends: 2438 [2021-08-21 17:33:58,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:33:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-08-21 17:33:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2352. [2021-08-21 17:33:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.1063377286261167) internal successors, (4952), 2351 states have internal predecessors, (4952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 4952 transitions. [2021-08-21 17:33:58,258 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 4952 transitions. Word has length 18 [2021-08-21 17:33:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:58,259 INFO L470 AbstractCegarLoop]: Abstraction has 2352 states and 4952 transitions. [2021-08-21 17:33:58,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 4952 transitions. [2021-08-21 17:33:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:33:58,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:58,261 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:58,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:58,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:58,478 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1188973261, now seen corresponding path program 80 times [2021-08-21 17:33:58,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:58,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115021109] [2021-08-21 17:33:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:58,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:58,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:58,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115021109] [2021-08-21 17:33:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115021109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:58,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943820917] [2021-08-21 17:33:58,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:58,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:58,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:58,564 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:58,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 17:33:59,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:59,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:59,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943820917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:59,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:59,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 17:33:59,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400660394] [2021-08-21 17:33:59,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:33:59,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:33:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:33:59,117 INFO L87 Difference]: Start difference. First operand 2352 states and 4952 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:59,371 INFO L93 Difference]: Finished difference Result 2724 states and 5696 transitions. [2021-08-21 17:33:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:33:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:33:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:59,374 INFO L225 Difference]: With dead ends: 2724 [2021-08-21 17:33:59,374 INFO L226 Difference]: Without dead ends: 2724 [2021-08-21 17:33:59,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:33:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-08-21 17:33:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2376. [2021-08-21 17:33:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 2.1052631578947367) internal successors, (5000), 2375 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 5000 transitions. [2021-08-21 17:33:59,398 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 5000 transitions. Word has length 18 [2021-08-21 17:33:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:59,398 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 5000 transitions. [2021-08-21 17:33:59,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 5000 transitions. [2021-08-21 17:33:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:33:59,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:59,400 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:59,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 17:33:59,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:59,616 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:33:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash -92801481, now seen corresponding path program 81 times [2021-08-21 17:33:59,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:59,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774516474] [2021-08-21 17:33:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:59,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:59,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:59,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774516474] [2021-08-21 17:33:59,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774516474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:59,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512217995] [2021-08-21 17:33:59,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:59,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:59,726 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:33:59,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 17:34:00,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:34:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:00,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:00,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512217995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:00,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:00,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:34:00,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653254562] [2021-08-21 17:34:00,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:34:00,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:00,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:34:00,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:00,283 INFO L87 Difference]: Start difference. First operand 2376 states and 5000 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:00,440 INFO L93 Difference]: Finished difference Result 2456 states and 5138 transitions. [2021-08-21 17:34:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:34:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 17:34:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:00,448 INFO L225 Difference]: With dead ends: 2456 [2021-08-21 17:34:00,449 INFO L226 Difference]: Without dead ends: 2453 [2021-08-21 17:34:00,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-08-21 17:34:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2380. [2021-08-21 17:34:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.1046658259773015) internal successors, (5007), 2379 states have internal predecessors, (5007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 5007 transitions. [2021-08-21 17:34:00,491 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 5007 transitions. Word has length 20 [2021-08-21 17:34:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:00,491 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 5007 transitions. [2021-08-21 17:34:00,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 5007 transitions. [2021-08-21 17:34:00,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:00,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:00,494 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:00,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 17:34:00,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 17:34:00,696 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1242718199, now seen corresponding path program 82 times [2021-08-21 17:34:00,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:00,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065718401] [2021-08-21 17:34:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:00,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:34:00,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:00,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065718401] [2021-08-21 17:34:00,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065718401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:00,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040373039] [2021-08-21 17:34:00,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:00,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:00,755 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:00,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 17:34:01,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:34:01,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:01,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:34:01,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040373039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:01,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:01,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:34:01,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329589927] [2021-08-21 17:34:01,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:34:01,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:01,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:34:01,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:34:01,301 INFO L87 Difference]: Start difference. First operand 2380 states and 5007 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:01,384 INFO L93 Difference]: Finished difference Result 2473 states and 5170 transitions. [2021-08-21 17:34:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:34:01,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:34:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:01,387 INFO L225 Difference]: With dead ends: 2473 [2021-08-21 17:34:01,387 INFO L226 Difference]: Without dead ends: 2472 [2021-08-21 17:34:01,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:34:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-21 17:34:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2377. [2021-08-21 17:34:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.1047979797979797) internal successors, (5001), 2376 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 5001 transitions. [2021-08-21 17:34:01,411 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 5001 transitions. Word has length 20 [2021-08-21 17:34:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:01,411 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 5001 transitions. [2021-08-21 17:34:01,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 5001 transitions. [2021-08-21 17:34:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:01,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:01,413 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:01,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:01,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:01,630 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1318086101, now seen corresponding path program 83 times [2021-08-21 17:34:01,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:01,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700371916] [2021-08-21 17:34:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:01,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:34:01,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:01,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700371916] [2021-08-21 17:34:01,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700371916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:01,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109409547] [2021-08-21 17:34:01,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:34:01,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:01,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:01,691 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:01,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 17:34:02,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:34:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:02,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:34:02,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109409547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:02,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:02,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:34:02,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672577506] [2021-08-21 17:34:02,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:34:02,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:34:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:34:02,260 INFO L87 Difference]: Start difference. First operand 2377 states and 5001 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:02,309 INFO L93 Difference]: Finished difference Result 2476 states and 5169 transitions. [2021-08-21 17:34:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:34:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:34:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:02,312 INFO L225 Difference]: With dead ends: 2476 [2021-08-21 17:34:02,312 INFO L226 Difference]: Without dead ends: 2475 [2021-08-21 17:34:02,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:34:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2021-08-21 17:34:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2369. [2021-08-21 17:34:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 2.105152027027027) internal successors, (4985), 2368 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 4985 transitions. [2021-08-21 17:34:02,334 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 4985 transitions. Word has length 20 [2021-08-21 17:34:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:02,334 INFO L470 AbstractCegarLoop]: Abstraction has 2369 states and 4985 transitions. [2021-08-21 17:34:02,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 4985 transitions. [2021-08-21 17:34:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:02,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:02,337 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:02,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:02,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:02,550 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:02,550 INFO L82 PathProgramCache]: Analyzing trace with hash 901359223, now seen corresponding path program 84 times [2021-08-21 17:34:02,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:02,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410832437] [2021-08-21 17:34:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:02,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:34:02,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:02,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410832437] [2021-08-21 17:34:02,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410832437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:02,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362307507] [2021-08-21 17:34:02,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:02,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:02,610 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:02,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 17:34:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:34:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:34:03,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362307507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:03,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:03,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 17:34:03,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94064831] [2021-08-21 17:34:03,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:34:03,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:34:03,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:34:03,194 INFO L87 Difference]: Start difference. First operand 2369 states and 4985 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:03,242 INFO L93 Difference]: Finished difference Result 2473 states and 5159 transitions. [2021-08-21 17:34:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:34:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:34:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:03,245 INFO L225 Difference]: With dead ends: 2473 [2021-08-21 17:34:03,245 INFO L226 Difference]: Without dead ends: 2472 [2021-08-21 17:34:03,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:34:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-21 17:34:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2364. [2021-08-21 17:34:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 2.1053745239102835) internal successors, (4975), 2363 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 4975 transitions. [2021-08-21 17:34:03,268 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 4975 transitions. Word has length 20 [2021-08-21 17:34:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:03,268 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 4975 transitions. [2021-08-21 17:34:03,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 4975 transitions. [2021-08-21 17:34:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:03,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:03,271 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:03,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:03,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 17:34:03,488 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:03,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1194188553, now seen corresponding path program 85 times [2021-08-21 17:34:03,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:03,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905627168] [2021-08-21 17:34:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:03,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:03,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:03,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905627168] [2021-08-21 17:34:03,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905627168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:03,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498707939] [2021-08-21 17:34:03,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:03,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:03,561 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:03,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 17:34:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:34:04,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498707939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:04,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:04,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:34:04,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066006016] [2021-08-21 17:34:04,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:34:04,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:04,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:34:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:34:04,190 INFO L87 Difference]: Start difference. First operand 2364 states and 4975 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:04,282 INFO L93 Difference]: Finished difference Result 2450 states and 5120 transitions. [2021-08-21 17:34:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:34:04,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 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 17:34:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:04,285 INFO L225 Difference]: With dead ends: 2450 [2021-08-21 17:34:04,285 INFO L226 Difference]: Without dead ends: 2450 [2021-08-21 17:34:04,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:34:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-08-21 17:34:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2366. [2021-08-21 17:34:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 2.1061310782241014) internal successors, (4981), 2365 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 4981 transitions. [2021-08-21 17:34:04,308 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 4981 transitions. Word has length 20 [2021-08-21 17:34:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:04,308 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 4981 transitions. [2021-08-21 17:34:04,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 4981 transitions. [2021-08-21 17:34:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:04,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:04,312 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:04,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:04,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:04,529 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 984687531, now seen corresponding path program 86 times [2021-08-21 17:34:04,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:04,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163137346] [2021-08-21 17:34:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:04,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:04,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:04,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163137346] [2021-08-21 17:34:04,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163137346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:04,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333339501] [2021-08-21 17:34:04,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:04,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:04,633 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:04,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 17:34:05,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:05,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:34:05,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333339501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:05,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:05,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 17:34:05,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628587189] [2021-08-21 17:34:05,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:34:05,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:05,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:34:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:34:05,253 INFO L87 Difference]: Start difference. First operand 2366 states and 4981 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:05,319 INFO L93 Difference]: Finished difference Result 2492 states and 5206 transitions. [2021-08-21 17:34:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:34:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:34:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:05,322 INFO L225 Difference]: With dead ends: 2492 [2021-08-21 17:34:05,322 INFO L226 Difference]: Without dead ends: 2492 [2021-08-21 17:34:05,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2021-08-21 17:34:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2345. [2021-08-21 17:34:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.1040955631399316) internal successors, (4932), 2344 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 4932 transitions. [2021-08-21 17:34:05,345 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 4932 transitions. Word has length 20 [2021-08-21 17:34:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:05,346 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 4932 transitions. [2021-08-21 17:34:05,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 4932 transitions. [2021-08-21 17:34:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:05,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:05,348 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:05,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:05,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:05,565 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash -248854767, now seen corresponding path program 87 times [2021-08-21 17:34:05,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:05,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758012276] [2021-08-21 17:34:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:05,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:05,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:05,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758012276] [2021-08-21 17:34:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758012276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:05,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107783220] [2021-08-21 17:34:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:34:05,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:05,680 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:05,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 17:34:06,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:34:06,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:06,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107783220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:06,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:06,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:34:06,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296306163] [2021-08-21 17:34:06,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:34:06,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:34:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:34:06,261 INFO L87 Difference]: Start difference. First operand 2345 states and 4932 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:06,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:06,363 INFO L93 Difference]: Finished difference Result 2517 states and 5262 transitions. [2021-08-21 17:34:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:34:06,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:34:06,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:06,382 INFO L225 Difference]: With dead ends: 2517 [2021-08-21 17:34:06,382 INFO L226 Difference]: Without dead ends: 2517 [2021-08-21 17:34:06,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:34:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-08-21 17:34:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2363. [2021-08-21 17:34:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2362 states have (on average 2.104995766299746) internal successors, (4972), 2362 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 4972 transitions. [2021-08-21 17:34:06,437 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 4972 transitions. Word has length 20 [2021-08-21 17:34:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:06,437 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 4972 transitions. [2021-08-21 17:34:06,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 4972 transitions. [2021-08-21 17:34:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:06,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:06,439 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:06,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:06,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:06,640 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -727102217, now seen corresponding path program 88 times [2021-08-21 17:34:06,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:06,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643187328] [2021-08-21 17:34:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:06,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:06,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:06,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643187328] [2021-08-21 17:34:06,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643187328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:06,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308699589] [2021-08-21 17:34:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:06,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:06,766 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:06,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 17:34:07,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:34:07,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:07,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:07,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308699589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:07,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:07,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:34:07,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537042219] [2021-08-21 17:34:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:34:07,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:34:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:34:07,398 INFO L87 Difference]: Start difference. First operand 2363 states and 4972 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:07,474 INFO L93 Difference]: Finished difference Result 2675 states and 5584 transitions. [2021-08-21 17:34:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:34:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:34:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:07,477 INFO L225 Difference]: With dead ends: 2675 [2021-08-21 17:34:07,477 INFO L226 Difference]: Without dead ends: 2675 [2021-08-21 17:34:07,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:34:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-08-21 17:34:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2544. [2021-08-21 17:34:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 2.1136453008257963) internal successors, (5375), 2543 states have internal predecessors, (5375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 5375 transitions. [2021-08-21 17:34:07,535 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 5375 transitions. Word has length 20 [2021-08-21 17:34:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:07,535 INFO L470 AbstractCegarLoop]: Abstraction has 2544 states and 5375 transitions. [2021-08-21 17:34:07,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 5375 transitions. [2021-08-21 17:34:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:07,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:07,538 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:07,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:07,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 17:34:07,738 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2033524727, now seen corresponding path program 89 times [2021-08-21 17:34:07,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:07,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747327382] [2021-08-21 17:34:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:07,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:07,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:07,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747327382] [2021-08-21 17:34:07,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747327382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:07,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256405356] [2021-08-21 17:34:07,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:34:07,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:07,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:07,840 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:07,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 17:34:08,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:34:08,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:34:08,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:08,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256405356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:08,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:08,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 17:34:08,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459259590] [2021-08-21 17:34:08,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:34:08,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:08,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:34:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:08,387 INFO L87 Difference]: Start difference. First operand 2544 states and 5375 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:08,506 INFO L93 Difference]: Finished difference Result 2743 states and 5760 transitions. [2021-08-21 17:34:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:34:08,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:34:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:08,521 INFO L225 Difference]: With dead ends: 2743 [2021-08-21 17:34:08,521 INFO L226 Difference]: Without dead ends: 2743 [2021-08-21 17:34:08,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:34:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2021-08-21 17:34:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2570. [2021-08-21 17:34:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 2.11599844297392) internal successors, (5436), 2569 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 5436 transitions. [2021-08-21 17:34:08,563 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 5436 transitions. Word has length 20 [2021-08-21 17:34:08,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:08,563 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 5436 transitions. [2021-08-21 17:34:08,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 5436 transitions. [2021-08-21 17:34:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:34:08,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:08,582 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:08,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 17:34:08,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:08,799 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2041990443, now seen corresponding path program 90 times [2021-08-21 17:34:08,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:08,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346304683] [2021-08-21 17:34:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:08,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:08,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:08,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346304683] [2021-08-21 17:34:08,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346304683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:08,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96896887] [2021-08-21 17:34:08,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:08,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:08,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:08,926 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:08,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 17:34:09,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:34:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:34:09,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96896887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:09,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:09,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-08-21 17:34:09,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20932829] [2021-08-21 17:34:09,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:34:09,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:09,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:34:09,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:34:09,550 INFO L87 Difference]: Start difference. First operand 2570 states and 5436 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:09,652 INFO L93 Difference]: Finished difference Result 2952 states and 6197 transitions. [2021-08-21 17:34:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:34:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 17:34:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:09,655 INFO L225 Difference]: With dead ends: 2952 [2021-08-21 17:34:09,655 INFO L226 Difference]: Without dead ends: 2952 [2021-08-21 17:34:09,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:34:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-08-21 17:34:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2810. [2021-08-21 17:34:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2809 states have (on average 2.121039515841937) internal successors, (5958), 2809 states have internal predecessors, (5958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 5958 transitions. [2021-08-21 17:34:09,684 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 5958 transitions. Word has length 20 [2021-08-21 17:34:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:09,684 INFO L470 AbstractCegarLoop]: Abstraction has 2810 states and 5958 transitions. [2021-08-21 17:34:09,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 5958 transitions. [2021-08-21 17:34:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:09,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:09,686 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:09,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:09,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:09,904 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1441190390, now seen corresponding path program 91 times [2021-08-21 17:34:09,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:09,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384693221] [2021-08-21 17:34:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:09,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:10,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:10,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384693221] [2021-08-21 17:34:10,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384693221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:10,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288292646] [2021-08-21 17:34:10,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:10,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:10,037 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:10,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 17:34:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:10,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:11,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:34:11,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:34:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:16,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288292646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:16,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:16,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:34:16,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778233340] [2021-08-21 17:34:16,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:16,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:16,633 INFO L87 Difference]: Start difference. First operand 2810 states and 5958 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:16,856 INFO L93 Difference]: Finished difference Result 2882 states and 6088 transitions. [2021-08-21 17:34:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:34:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:16,860 INFO L225 Difference]: With dead ends: 2882 [2021-08-21 17:34:16,860 INFO L226 Difference]: Without dead ends: 2879 [2021-08-21 17:34:16,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-08-21 17:34:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2849. [2021-08-21 17:34:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.1228932584269664) internal successors, (6046), 2848 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 6046 transitions. [2021-08-21 17:34:16,889 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 6046 transitions. Word has length 21 [2021-08-21 17:34:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:16,889 INFO L470 AbstractCegarLoop]: Abstraction has 2849 states and 6046 transitions. [2021-08-21 17:34:16,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 6046 transitions. [2021-08-21 17:34:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:16,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:16,891 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:16,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:17,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:17,105 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1342147236, now seen corresponding path program 92 times [2021-08-21 17:34:17,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:17,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262622144] [2021-08-21 17:34:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:17,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:17,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:17,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262622144] [2021-08-21 17:34:17,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262622144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:17,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956677858] [2021-08-21 17:34:17,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:17,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:17,201 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:17,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 17:34:17,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:17,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:18,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:34:18,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:34:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:23,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956677858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:23,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:23,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:34:23,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185332758] [2021-08-21 17:34:23,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:23,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:23,560 INFO L87 Difference]: Start difference. First operand 2849 states and 6046 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:23,775 INFO L93 Difference]: Finished difference Result 2922 states and 6182 transitions. [2021-08-21 17:34:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:34:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:23,779 INFO L225 Difference]: With dead ends: 2922 [2021-08-21 17:34:23,779 INFO L226 Difference]: Without dead ends: 2919 [2021-08-21 17:34:23,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-08-21 17:34:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2888. [2021-08-21 17:34:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 2.1260824385174923) internal successors, (6138), 2887 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 6138 transitions. [2021-08-21 17:34:23,808 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 6138 transitions. Word has length 21 [2021-08-21 17:34:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:23,808 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 6138 transitions. [2021-08-21 17:34:23,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:23,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 6138 transitions. [2021-08-21 17:34:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:23,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:23,811 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:23,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:24,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:24,029 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1523861020, now seen corresponding path program 93 times [2021-08-21 17:34:24,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:24,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622121876] [2021-08-21 17:34:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:24,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:24,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:24,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622121876] [2021-08-21 17:34:24,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622121876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:24,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866682358] [2021-08-21 17:34:24,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:34:24,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:24,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:24,100 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:24,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 17:34:24,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:34:24,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:24,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:25,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:34:25,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:34:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:30,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866682358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:30,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:30,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:34:30,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179817690] [2021-08-21 17:34:30,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:30,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:30,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:30,609 INFO L87 Difference]: Start difference. First operand 2888 states and 6138 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:30,791 INFO L93 Difference]: Finished difference Result 2962 states and 6275 transitions. [2021-08-21 17:34:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:30,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:34:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:30,794 INFO L225 Difference]: With dead ends: 2962 [2021-08-21 17:34:30,794 INFO L226 Difference]: Without dead ends: 2959 [2021-08-21 17:34:30,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-08-21 17:34:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2926. [2021-08-21 17:34:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 2.128888888888889) internal successors, (6227), 2925 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 6227 transitions. [2021-08-21 17:34:30,822 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 6227 transitions. Word has length 21 [2021-08-21 17:34:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:30,822 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 6227 transitions. [2021-08-21 17:34:30,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 6227 transitions. [2021-08-21 17:34:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:30,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:30,824 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:30,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:31,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 17:34:31,041 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1432946268, now seen corresponding path program 94 times [2021-08-21 17:34:31,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:31,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657940720] [2021-08-21 17:34:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:31,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:34:31,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:31,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657940720] [2021-08-21 17:34:31,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657940720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:31,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492944779] [2021-08-21 17:34:31,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:31,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:31,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:31,115 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:31,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 17:34:31,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:34:31,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:31,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:32,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:34:32,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:34:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:38,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492944779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:38,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:38,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:34:38,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835013788] [2021-08-21 17:34:38,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:38,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:38,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:38,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:38,602 INFO L87 Difference]: Start difference. First operand 2926 states and 6227 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:38,786 INFO L93 Difference]: Finished difference Result 3006 states and 6372 transitions. [2021-08-21 17:34:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:34:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:38,790 INFO L225 Difference]: With dead ends: 3006 [2021-08-21 17:34:38,790 INFO L226 Difference]: Without dead ends: 3003 [2021-08-21 17:34:38,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-08-21 17:34:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2963. [2021-08-21 17:34:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 2.1326806212018905) internal successors, (6317), 2962 states have internal predecessors, (6317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 6317 transitions. [2021-08-21 17:34:38,822 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 6317 transitions. Word has length 21 [2021-08-21 17:34:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:38,822 INFO L470 AbstractCegarLoop]: Abstraction has 2963 states and 6317 transitions. [2021-08-21 17:34:38,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 6317 transitions. [2021-08-21 17:34:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:38,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:38,824 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:38,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:39,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 17:34:39,032 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1395308316, now seen corresponding path program 95 times [2021-08-21 17:34:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:39,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797590336] [2021-08-21 17:34:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:39,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:39,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:39,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797590336] [2021-08-21 17:34:39,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797590336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:39,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086429240] [2021-08-21 17:34:39,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:34:39,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:39,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:39,112 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:39,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 17:34:39,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:34:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:40,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:34:40,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:34:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:46,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086429240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:46,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:46,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:34:46,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596065420] [2021-08-21 17:34:46,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:46,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:46,478 INFO L87 Difference]: Start difference. First operand 2963 states and 6317 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:46,710 INFO L93 Difference]: Finished difference Result 3041 states and 6466 transitions. [2021-08-21 17:34:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:34:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:46,714 INFO L225 Difference]: With dead ends: 3041 [2021-08-21 17:34:46,714 INFO L226 Difference]: Without dead ends: 3038 [2021-08-21 17:34:46,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-08-21 17:34:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 3009. [2021-08-21 17:34:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.134973404255319) internal successors, (6422), 3008 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 6422 transitions. [2021-08-21 17:34:46,766 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 6422 transitions. Word has length 21 [2021-08-21 17:34:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:46,767 INFO L470 AbstractCegarLoop]: Abstraction has 3009 states and 6422 transitions. [2021-08-21 17:34:46,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 6422 transitions. [2021-08-21 17:34:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:46,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:46,769 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:46,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:46,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:46,986 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1123112796, now seen corresponding path program 96 times [2021-08-21 17:34:46,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:46,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199015880] [2021-08-21 17:34:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:46,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:47,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:47,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199015880] [2021-08-21 17:34:47,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199015880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:47,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900546510] [2021-08-21 17:34:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:47,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:47,061 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:47,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 17:34:47,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:34:47,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:47,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:48,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:34:48,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:34:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:53,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900546510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:53,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:53,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:34:53,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000458463] [2021-08-21 17:34:53,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:53,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:53,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:53,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:53,503 INFO L87 Difference]: Start difference. First operand 3009 states and 6422 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:53,757 INFO L93 Difference]: Finished difference Result 3101 states and 6599 transitions. [2021-08-21 17:34:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:34:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:53,761 INFO L225 Difference]: With dead ends: 3101 [2021-08-21 17:34:53,761 INFO L226 Difference]: Without dead ends: 3098 [2021-08-21 17:34:53,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-08-21 17:34:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 3066. [2021-08-21 17:34:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 3065 states have (on average 2.13768352365416) internal successors, (6552), 3065 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 6552 transitions. [2021-08-21 17:34:53,791 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 6552 transitions. Word has length 21 [2021-08-21 17:34:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:53,791 INFO L470 AbstractCegarLoop]: Abstraction has 3066 states and 6552 transitions. [2021-08-21 17:34:53,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 6552 transitions. [2021-08-21 17:34:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:53,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:53,794 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:53,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:54,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:54,011 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1884755940, now seen corresponding path program 97 times [2021-08-21 17:34:54,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:54,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082737103] [2021-08-21 17:34:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:54,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:34:54,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:54,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082737103] [2021-08-21 17:34:54,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082737103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:54,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407035650] [2021-08-21 17:34:54,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:54,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:54,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:54,082 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:54,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 17:34:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:54,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:54,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:55,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:34:55,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:34:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:58,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407035650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:58,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:58,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:34:58,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124030378] [2021-08-21 17:34:58,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:34:58,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:34:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:58,803 INFO L87 Difference]: Start difference. First operand 3066 states and 6552 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:59,022 INFO L93 Difference]: Finished difference Result 3198 states and 6813 transitions. [2021-08-21 17:34:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:34:59,023 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:34:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:59,026 INFO L225 Difference]: With dead ends: 3198 [2021-08-21 17:34:59,026 INFO L226 Difference]: Without dead ends: 3195 [2021-08-21 17:34:59,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:34:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3195 states. [2021-08-21 17:34:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3195 to 3161. [2021-08-21 17:34:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 2.141139240506329) internal successors, (6766), 3160 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 6766 transitions. [2021-08-21 17:34:59,061 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 6766 transitions. Word has length 21 [2021-08-21 17:34:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:59,061 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 6766 transitions. [2021-08-21 17:34:59,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 6766 transitions. [2021-08-21 17:34:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:34:59,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:59,064 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:59,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:59,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 17:34:59,281 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:34:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:59,282 INFO L82 PathProgramCache]: Analyzing trace with hash 274110372, now seen corresponding path program 98 times [2021-08-21 17:34:59,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:59,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017856062] [2021-08-21 17:34:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:59,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:59,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:59,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017856062] [2021-08-21 17:34:59,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017856062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:59,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546949558] [2021-08-21 17:34:59,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:59,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:59,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:59,357 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:34:59,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 17:34:59,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:59,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:34:59,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:00,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:35:00,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:35:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:05,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546949558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:05,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:05,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:35:05,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42290214] [2021-08-21 17:35:05,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:35:05,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:35:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:05,578 INFO L87 Difference]: Start difference. First operand 3161 states and 6766 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:05,814 INFO L93 Difference]: Finished difference Result 3554 states and 7566 transitions. [2021-08-21 17:35:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:05,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:35:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:05,819 INFO L225 Difference]: With dead ends: 3554 [2021-08-21 17:35:05,819 INFO L226 Difference]: Without dead ends: 3551 [2021-08-21 17:35:05,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-08-21 17:35:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 3526. [2021-08-21 17:35:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 2.1358865248226953) internal successors, (7529), 3525 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 7529 transitions. [2021-08-21 17:35:05,859 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 7529 transitions. Word has length 21 [2021-08-21 17:35:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 7529 transitions. [2021-08-21 17:35:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 7529 transitions. [2021-08-21 17:35:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:35:05,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:05,862 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:05,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:06,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:06,080 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1520510692, now seen corresponding path program 99 times [2021-08-21 17:35:06,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:06,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827383681] [2021-08-21 17:35:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:06,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:06,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:06,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827383681] [2021-08-21 17:35:06,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827383681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:06,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633642292] [2021-08-21 17:35:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:06,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:06,171 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:06,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 17:35:06,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:35:06,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:06,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:35:06,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:07,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:35:07,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:35:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:13,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633642292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:13,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:13,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:35:13,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85986635] [2021-08-21 17:35:13,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:35:13,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:35:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:13,389 INFO L87 Difference]: Start difference. First operand 3526 states and 7529 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:13,639 INFO L93 Difference]: Finished difference Result 3923 states and 8338 transitions. [2021-08-21 17:35:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:35:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:13,644 INFO L225 Difference]: With dead ends: 3923 [2021-08-21 17:35:13,644 INFO L226 Difference]: Without dead ends: 3920 [2021-08-21 17:35:13,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2021-08-21 17:35:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3901. [2021-08-21 17:35:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.1317948717948716) internal successors, (8314), 3900 states have internal predecessors, (8314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 8314 transitions. [2021-08-21 17:35:13,687 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 8314 transitions. Word has length 21 [2021-08-21 17:35:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:13,687 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 8314 transitions. [2021-08-21 17:35:13,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 8314 transitions. [2021-08-21 17:35:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:35:13,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:13,690 INFO L512 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:13,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:13,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 17:35:13,908 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1319188828, now seen corresponding path program 100 times [2021-08-21 17:35:13,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:13,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901797045] [2021-08-21 17:35:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:13,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:13,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:13,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901797045] [2021-08-21 17:35:13,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901797045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:13,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595485061] [2021-08-21 17:35:13,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:13,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:13,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:13,987 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:13,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 17:35:14,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:14,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:35:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:15,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:35:15,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-08-21 17:35:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:20,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595485061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:20,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:20,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-21 17:35:20,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995817688] [2021-08-21 17:35:20,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:35:20,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:35:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:20,104 INFO L87 Difference]: Start difference. First operand 3901 states and 8314 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:20,397 INFO L93 Difference]: Finished difference Result 4224 states and 8968 transitions. [2021-08-21 17:35:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:20,398 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:35:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:20,403 INFO L225 Difference]: With dead ends: 4224 [2021-08-21 17:35:20,403 INFO L226 Difference]: Without dead ends: 4221 [2021-08-21 17:35:20,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-08-21 17:35:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4197. [2021-08-21 17:35:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4197 states, 4196 states have (on average 2.130362249761678) internal successors, (8939), 4196 states have internal predecessors, (8939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4197 states to 4197 states and 8939 transitions. [2021-08-21 17:35:20,449 INFO L78 Accepts]: Start accepts. Automaton has 4197 states and 8939 transitions. Word has length 21 [2021-08-21 17:35:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:20,449 INFO L470 AbstractCegarLoop]: Abstraction has 4197 states and 8939 transitions. [2021-08-21 17:35:20,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4197 states and 8939 transitions. [2021-08-21 17:35:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:20,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:20,453 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:20,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:20,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 17:35:20,670 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1750298135, now seen corresponding path program 101 times [2021-08-21 17:35:20,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:20,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123947489] [2021-08-21 17:35:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:20,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:20,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:20,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123947489] [2021-08-21 17:35:20,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123947489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:20,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236050488] [2021-08-21 17:35:20,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:20,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:20,778 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:20,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 17:35:21,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:35:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:21,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:21,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236050488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:21,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:21,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:35:21,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113924333] [2021-08-21 17:35:21,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:35:21,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:35:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:35:21,518 INFO L87 Difference]: Start difference. First operand 4197 states and 8939 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:21,791 INFO L93 Difference]: Finished difference Result 4343 states and 9141 transitions. [2021-08-21 17:35:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:35:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:21,796 INFO L225 Difference]: With dead ends: 4343 [2021-08-21 17:35:21,796 INFO L226 Difference]: Without dead ends: 4339 [2021-08-21 17:35:21,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:35:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-08-21 17:35:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 4228. [2021-08-21 17:35:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.1291696238466997) internal successors, (9000), 4227 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 9000 transitions. [2021-08-21 17:35:21,844 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 9000 transitions. Word has length 22 [2021-08-21 17:35:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:21,844 INFO L470 AbstractCegarLoop]: Abstraction has 4228 states and 9000 transitions. [2021-08-21 17:35:21,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 9000 transitions. [2021-08-21 17:35:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:21,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:21,848 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:21,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:22,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 17:35:22,063 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1074870167, now seen corresponding path program 102 times [2021-08-21 17:35:22,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:22,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374965009] [2021-08-21 17:35:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:22,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:22,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:22,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374965009] [2021-08-21 17:35:22,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374965009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:22,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266755516] [2021-08-21 17:35:22,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:22,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:22,154 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:22,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 17:35:22,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:35:22,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:22,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:22,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:22,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266755516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:22,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:22,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:22,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047118840] [2021-08-21 17:35:22,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:22,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:22,890 INFO L87 Difference]: Start difference. First operand 4228 states and 9000 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:22,951 INFO L93 Difference]: Finished difference Result 4480 states and 9420 transitions. [2021-08-21 17:35:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:35:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:22,956 INFO L225 Difference]: With dead ends: 4480 [2021-08-21 17:35:22,956 INFO L226 Difference]: Without dead ends: 4480 [2021-08-21 17:35:22,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2021-08-21 17:35:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 4186. [2021-08-21 17:35:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 2.127120669056153) internal successors, (8902), 4185 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 8902 transitions. [2021-08-21 17:35:23,001 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 8902 transitions. Word has length 22 [2021-08-21 17:35:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:23,001 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 8902 transitions. [2021-08-21 17:35:23,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 8902 transitions. [2021-08-21 17:35:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:23,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:23,005 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:23,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:23,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:23,222 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1320039639, now seen corresponding path program 103 times [2021-08-21 17:35:23,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:23,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097186549] [2021-08-21 17:35:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:23,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:23,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:23,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097186549] [2021-08-21 17:35:23,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097186549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:23,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622370966] [2021-08-21 17:35:23,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:23,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:23,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:23,297 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:23,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 17:35:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:24,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622370966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:24,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:24,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:24,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324181346] [2021-08-21 17:35:24,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:24,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:24,070 INFO L87 Difference]: Start difference. First operand 4186 states and 8902 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:24,197 INFO L93 Difference]: Finished difference Result 4315 states and 9079 transitions. [2021-08-21 17:35:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:24,202 INFO L225 Difference]: With dead ends: 4315 [2021-08-21 17:35:24,202 INFO L226 Difference]: Without dead ends: 4314 [2021-08-21 17:35:24,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=209, Invalid=343, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-08-21 17:35:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 4217. [2021-08-21 17:35:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4217 states, 4216 states have (on average 2.1276091081593926) internal successors, (8970), 4216 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4217 states to 4217 states and 8970 transitions. [2021-08-21 17:35:24,249 INFO L78 Accepts]: Start accepts. Automaton has 4217 states and 8970 transitions. Word has length 22 [2021-08-21 17:35:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:24,249 INFO L470 AbstractCegarLoop]: Abstraction has 4217 states and 8970 transitions. [2021-08-21 17:35:24,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4217 states and 8970 transitions. [2021-08-21 17:35:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:24,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:24,253 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:24,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:24,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:24,471 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:24,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1256583951, now seen corresponding path program 104 times [2021-08-21 17:35:24,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:24,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813925207] [2021-08-21 17:35:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:24,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:24,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:24,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813925207] [2021-08-21 17:35:24,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813925207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:24,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111005018] [2021-08-21 17:35:24,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:24,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:24,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:24,556 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:24,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 17:35:25,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:25,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:25,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111005018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:25,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:25,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:25,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116889086] [2021-08-21 17:35:25,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:25,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:25,325 INFO L87 Difference]: Start difference. First operand 4217 states and 8970 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:25,390 INFO L93 Difference]: Finished difference Result 4557 states and 9557 transitions. [2021-08-21 17:35:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:35:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:25,396 INFO L225 Difference]: With dead ends: 4557 [2021-08-21 17:35:25,396 INFO L226 Difference]: Without dead ends: 4557 [2021-08-21 17:35:25,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4557 states. [2021-08-21 17:35:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4557 to 4219. [2021-08-21 17:35:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 4218 states have (on average 2.127548601232812) internal successors, (8974), 4218 states have internal predecessors, (8974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 8974 transitions. [2021-08-21 17:35:25,448 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 8974 transitions. Word has length 22 [2021-08-21 17:35:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:25,448 INFO L470 AbstractCegarLoop]: Abstraction has 4219 states and 8974 transitions. [2021-08-21 17:35:25,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 8974 transitions. [2021-08-21 17:35:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:25,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:25,452 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:25,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:25,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 17:35:25,669 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1327770037, now seen corresponding path program 105 times [2021-08-21 17:35:25,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:25,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257922598] [2021-08-21 17:35:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:25,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:25,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:25,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257922598] [2021-08-21 17:35:25,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257922598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:25,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114345814] [2021-08-21 17:35:25,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:25,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:25,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:25,757 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:25,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 17:35:26,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:35:26,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:26,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:26,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114345814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:26,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:26,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:35:26,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380515125] [2021-08-21 17:35:26,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:26,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:26,543 INFO L87 Difference]: Start difference. First operand 4219 states and 8974 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:26,622 INFO L93 Difference]: Finished difference Result 4869 states and 10181 transitions. [2021-08-21 17:35:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:35:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:26,627 INFO L225 Difference]: With dead ends: 4869 [2021-08-21 17:35:26,627 INFO L226 Difference]: Without dead ends: 4869 [2021-08-21 17:35:26,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:35:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2021-08-21 17:35:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 4176. [2021-08-21 17:35:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 4175 states have (on average 2.125508982035928) internal successors, (8874), 4175 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 8874 transitions. [2021-08-21 17:35:26,674 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 8874 transitions. Word has length 22 [2021-08-21 17:35:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:26,674 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 8874 transitions. [2021-08-21 17:35:26,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 8874 transitions. [2021-08-21 17:35:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:26,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:26,677 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:26,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:26,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:26,895 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash 18120369, now seen corresponding path program 106 times [2021-08-21 17:35:26,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:26,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364027985] [2021-08-21 17:35:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:26,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:26,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:26,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364027985] [2021-08-21 17:35:26,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364027985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:26,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146646307] [2021-08-21 17:35:26,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:26,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:26,969 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 17:35:27,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:27,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:27,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:27,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146646307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:27,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:27,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:27,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821532650] [2021-08-21 17:35:27,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:27,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:27,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:27,727 INFO L87 Difference]: Start difference. First operand 4176 states and 8874 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:27,848 INFO L93 Difference]: Finished difference Result 4305 states and 9053 transitions. [2021-08-21 17:35:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:27,853 INFO L225 Difference]: With dead ends: 4305 [2021-08-21 17:35:27,853 INFO L226 Difference]: Without dead ends: 4304 [2021-08-21 17:35:27,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-08-21 17:35:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4209. [2021-08-21 17:35:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4209 states, 4208 states have (on average 2.1259505703422055) internal successors, (8946), 4208 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4209 states to 4209 states and 8946 transitions. [2021-08-21 17:35:27,896 INFO L78 Accepts]: Start accepts. Automaton has 4209 states and 8946 transitions. Word has length 22 [2021-08-21 17:35:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:27,896 INFO L470 AbstractCegarLoop]: Abstraction has 4209 states and 8946 transitions. [2021-08-21 17:35:27,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4209 states and 8946 transitions. [2021-08-21 17:35:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:27,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:27,899 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:27,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:28,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:28,117 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1700223337, now seen corresponding path program 107 times [2021-08-21 17:35:28,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:28,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394934725] [2021-08-21 17:35:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:28,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:28,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:28,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394934725] [2021-08-21 17:35:28,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394934725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:28,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580638454] [2021-08-21 17:35:28,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:28,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:28,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:28,190 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:28,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 17:35:28,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:35:28,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:28,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:28,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580638454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:28,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:28,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:28,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671508290] [2021-08-21 17:35:28,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:28,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:28,929 INFO L87 Difference]: Start difference. First operand 4209 states and 8946 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:28,995 INFO L93 Difference]: Finished difference Result 4589 states and 9616 transitions. [2021-08-21 17:35:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:35:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:29,000 INFO L225 Difference]: With dead ends: 4589 [2021-08-21 17:35:29,000 INFO L226 Difference]: Without dead ends: 4589 [2021-08-21 17:35:29,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-08-21 17:35:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 4210. [2021-08-21 17:35:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4209 states have (on average 2.12592064623426) internal successors, (8948), 4209 states have internal predecessors, (8948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 8948 transitions. [2021-08-21 17:35:29,048 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 8948 transitions. Word has length 22 [2021-08-21 17:35:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:29,048 INFO L470 AbstractCegarLoop]: Abstraction has 4210 states and 8948 transitions. [2021-08-21 17:35:29,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 8948 transitions. [2021-08-21 17:35:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:29,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:29,051 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:29,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 17:35:29,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:29,269 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:29,269 INFO L82 PathProgramCache]: Analyzing trace with hash 10389971, now seen corresponding path program 108 times [2021-08-21 17:35:29,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:29,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234282535] [2021-08-21 17:35:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:29,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:29,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:29,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234282535] [2021-08-21 17:35:29,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234282535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:29,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956232460] [2021-08-21 17:35:29,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:29,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:29,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:29,353 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:29,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 17:35:29,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:35:29,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:30,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956232460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:30,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:30,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:35:30,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41779587] [2021-08-21 17:35:30,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:30,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:30,039 INFO L87 Difference]: Start difference. First operand 4210 states and 8948 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:30,126 INFO L93 Difference]: Finished difference Result 5062 states and 10555 transitions. [2021-08-21 17:35:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:35:30,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:30,132 INFO L225 Difference]: With dead ends: 5062 [2021-08-21 17:35:30,132 INFO L226 Difference]: Without dead ends: 5062 [2021-08-21 17:35:30,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:35:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2021-08-21 17:35:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4167. [2021-08-21 17:35:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4166 states have (on average 2.1238598175708114) internal successors, (8848), 4166 states have internal predecessors, (8848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 8848 transitions. [2021-08-21 17:35:30,209 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 8848 transitions. Word has length 22 [2021-08-21 17:35:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:30,209 INFO L470 AbstractCegarLoop]: Abstraction has 4167 states and 8848 transitions. [2021-08-21 17:35:30,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 8848 transitions. [2021-08-21 17:35:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:30,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:30,222 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:30,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 17:35:30,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 17:35:30,429 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1499794967, now seen corresponding path program 109 times [2021-08-21 17:35:30,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:30,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963535520] [2021-08-21 17:35:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:30,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:30,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:30,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963535520] [2021-08-21 17:35:30,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963535520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:30,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158950380] [2021-08-21 17:35:30,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:30,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:30,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:30,514 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:30,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 17:35:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:31,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:31,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158950380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:31,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:31,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:35:31,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287052665] [2021-08-21 17:35:31,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:31,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:31,315 INFO L87 Difference]: Start difference. First operand 4167 states and 8848 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:31,427 INFO L93 Difference]: Finished difference Result 6696 states and 14087 transitions. [2021-08-21 17:35:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:35:31,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:31,435 INFO L225 Difference]: With dead ends: 6696 [2021-08-21 17:35:31,435 INFO L226 Difference]: Without dead ends: 6696 [2021-08-21 17:35:31,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:35:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6696 states. [2021-08-21 17:35:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6696 to 5685. [2021-08-21 17:35:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5685 states, 5684 states have (on average 2.131069669247009) internal successors, (12113), 5684 states have internal predecessors, (12113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5685 states to 5685 states and 12113 transitions. [2021-08-21 17:35:31,501 INFO L78 Accepts]: Start accepts. Automaton has 5685 states and 12113 transitions. Word has length 22 [2021-08-21 17:35:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:31,501 INFO L470 AbstractCegarLoop]: Abstraction has 5685 states and 12113 transitions. [2021-08-21 17:35:31,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5685 states and 12113 transitions. [2021-08-21 17:35:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:31,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:31,506 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:31,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 17:35:31,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 17:35:31,719 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1448592343, now seen corresponding path program 110 times [2021-08-21 17:35:31,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:31,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586909574] [2021-08-21 17:35:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:31,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:31,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:31,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586909574] [2021-08-21 17:35:31,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586909574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:31,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231579136] [2021-08-21 17:35:31,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:31,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:31,790 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:31,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 17:35:32,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:32,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231579136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:32,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654863304] [2021-08-21 17:35:32,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:32,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:32,525 INFO L87 Difference]: Start difference. First operand 5685 states and 12113 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:32,641 INFO L93 Difference]: Finished difference Result 5866 states and 12415 transitions. [2021-08-21 17:35:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:32,647 INFO L225 Difference]: With dead ends: 5866 [2021-08-21 17:35:32,647 INFO L226 Difference]: Without dead ends: 5865 [2021-08-21 17:35:32,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2021-08-21 17:35:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 5775. [2021-08-21 17:35:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 2.13197090405265) internal successors, (12310), 5774 states have internal predecessors, (12310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 12310 transitions. [2021-08-21 17:35:32,709 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 12310 transitions. Word has length 22 [2021-08-21 17:35:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 5775 states and 12310 transitions. [2021-08-21 17:35:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 12310 transitions. [2021-08-21 17:35:32,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:32,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:32,713 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:32,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:32,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 17:35:32,931 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:32,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1128031247, now seen corresponding path program 111 times [2021-08-21 17:35:32,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:32,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650125708] [2021-08-21 17:35:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:32,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:32,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:32,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650125708] [2021-08-21 17:35:33,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650125708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:33,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966364505] [2021-08-21 17:35:33,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:33,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:33,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:33,000 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:33,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 17:35:33,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:35:33,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:33,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:33,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966364505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:33,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:33,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:33,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681669957] [2021-08-21 17:35:33,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:33,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:33,806 INFO L87 Difference]: Start difference. First operand 5775 states and 12310 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:33,868 INFO L93 Difference]: Finished difference Result 5860 states and 12387 transitions. [2021-08-21 17:35:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:35:33,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:33,875 INFO L225 Difference]: With dead ends: 5860 [2021-08-21 17:35:33,875 INFO L226 Difference]: Without dead ends: 5860 [2021-08-21 17:35:33,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2021-08-21 17:35:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 5764. [2021-08-21 17:35:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5764 states, 5763 states have (on average 2.129793510324484) internal successors, (12274), 5763 states have internal predecessors, (12274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5764 states to 5764 states and 12274 transitions. [2021-08-21 17:35:33,943 INFO L78 Accepts]: Start accepts. Automaton has 5764 states and 12274 transitions. Word has length 22 [2021-08-21 17:35:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:33,943 INFO L470 AbstractCegarLoop]: Abstraction has 5764 states and 12274 transitions. [2021-08-21 17:35:33,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 5764 states and 12274 transitions. [2021-08-21 17:35:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:33,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:33,949 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:33,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:34,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 17:35:34,168 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1456322741, now seen corresponding path program 112 times [2021-08-21 17:35:34,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:34,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351309362] [2021-08-21 17:35:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:34,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:34,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:34,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351309362] [2021-08-21 17:35:34,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351309362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:34,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309503419] [2021-08-21 17:35:34,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:34,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:34,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:34,251 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:34,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 17:35:35,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:35,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:35,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309503419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:35,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:35,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:35:35,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875376133] [2021-08-21 17:35:35,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:35,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:35,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:35,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:35,099 INFO L87 Difference]: Start difference. First operand 5764 states and 12274 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:35,187 INFO L93 Difference]: Finished difference Result 6533 states and 13726 transitions. [2021-08-21 17:35:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:35:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:35,196 INFO L225 Difference]: With dead ends: 6533 [2021-08-21 17:35:35,196 INFO L226 Difference]: Without dead ends: 6533 [2021-08-21 17:35:35,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:35:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2021-08-21 17:35:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 5775. [2021-08-21 17:35:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 2.1295462417734674) internal successors, (12296), 5774 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 12296 transitions. [2021-08-21 17:35:35,276 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 12296 transitions. Word has length 22 [2021-08-21 17:35:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:35,276 INFO L470 AbstractCegarLoop]: Abstraction has 5775 states and 12296 transitions. [2021-08-21 17:35:35,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 12296 transitions. [2021-08-21 17:35:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:35,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:35,282 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:35,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 17:35:35,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:35,500 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash 33082255, now seen corresponding path program 113 times [2021-08-21 17:35:35,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:35,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421719731] [2021-08-21 17:35:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:35,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:35,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:35,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421719731] [2021-08-21 17:35:35,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421719731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:35,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401328864] [2021-08-21 17:35:35,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:35,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:35,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:35,580 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:35,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 17:35:36,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:35:36,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:36,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401328864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:36,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:36,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:35:36,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873319233] [2021-08-21 17:35:36,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:36,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:36,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:36,445 INFO L87 Difference]: Start difference. First operand 5775 states and 12296 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:36,538 INFO L93 Difference]: Finished difference Result 9290 states and 19704 transitions. [2021-08-21 17:35:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:35:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:36,549 INFO L225 Difference]: With dead ends: 9290 [2021-08-21 17:35:36,549 INFO L226 Difference]: Without dead ends: 9290 [2021-08-21 17:35:36,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:35:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-08-21 17:35:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 8632. [2021-08-21 17:35:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8632 states, 8631 states have (on average 2.1363689027922605) internal successors, (18439), 8631 states have internal predecessors, (18439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8632 states to 8632 states and 18439 transitions. [2021-08-21 17:35:36,652 INFO L78 Accepts]: Start accepts. Automaton has 8632 states and 18439 transitions. Word has length 22 [2021-08-21 17:35:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:36,652 INFO L470 AbstractCegarLoop]: Abstraction has 8632 states and 18439 transitions. [2021-08-21 17:35:36,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 8632 states and 18439 transitions. [2021-08-21 17:35:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:36,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:36,659 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:36,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:36,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:36,878 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1040003125, now seen corresponding path program 114 times [2021-08-21 17:35:36,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:36,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077510735] [2021-08-21 17:35:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:36,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:36,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:36,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077510735] [2021-08-21 17:35:36,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077510735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:36,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666642242] [2021-08-21 17:35:36,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:36,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:36,966 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:36,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 17:35:37,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:35:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:37,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666642242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:37,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:37,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:35:37,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064739087] [2021-08-21 17:35:37,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:37,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:37,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:37,774 INFO L87 Difference]: Start difference. First operand 8632 states and 18439 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:37,932 INFO L93 Difference]: Finished difference Result 12305 states and 26135 transitions. [2021-08-21 17:35:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:35:37,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:37,949 INFO L225 Difference]: With dead ends: 12305 [2021-08-21 17:35:37,949 INFO L226 Difference]: Without dead ends: 12305 [2021-08-21 17:35:37,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2021-08-21 17:35:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 10908. [2021-08-21 17:35:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10908 states, 10907 states have (on average 2.143394150545521) internal successors, (23378), 10907 states have internal predecessors, (23378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10908 states to 10908 states and 23378 transitions. [2021-08-21 17:35:38,182 INFO L78 Accepts]: Start accepts. Automaton has 10908 states and 23378 transitions. Word has length 22 [2021-08-21 17:35:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:38,182 INFO L470 AbstractCegarLoop]: Abstraction has 10908 states and 23378 transitions. [2021-08-21 17:35:38,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10908 states and 23378 transitions. [2021-08-21 17:35:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:38,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:38,190 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:38,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:38,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 17:35:38,408 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash 989489111, now seen corresponding path program 115 times [2021-08-21 17:35:38,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:38,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125307018] [2021-08-21 17:35:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:38,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:35:38,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:38,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125307018] [2021-08-21 17:35:38,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125307018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:38,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001798994] [2021-08-21 17:35:38,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:38,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:38,477 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:38,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 17:35:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:35:39,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001798994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:39,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:39,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:35:39,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479356716] [2021-08-21 17:35:39,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:35:39,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:39,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:35:39,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:35:39,298 INFO L87 Difference]: Start difference. First operand 10908 states and 23378 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:39,434 INFO L93 Difference]: Finished difference Result 11289 states and 24150 transitions. [2021-08-21 17:35:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:35:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:35:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:39,449 INFO L225 Difference]: With dead ends: 11289 [2021-08-21 17:35:39,449 INFO L226 Difference]: Without dead ends: 11287 [2021-08-21 17:35:39,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:35:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11287 states. [2021-08-21 17:35:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11287 to 11225. [2021-08-21 17:35:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11225 states, 11224 states have (on average 2.1457590876692803) internal successors, (24084), 11224 states have internal predecessors, (24084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11225 states to 11225 states and 24084 transitions. [2021-08-21 17:35:39,600 INFO L78 Accepts]: Start accepts. Automaton has 11225 states and 24084 transitions. Word has length 22 [2021-08-21 17:35:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:39,600 INFO L470 AbstractCegarLoop]: Abstraction has 11225 states and 24084 transitions. [2021-08-21 17:35:39,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 11225 states and 24084 transitions. [2021-08-21 17:35:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:39,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:39,609 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:39,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:39,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:39,819 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1158435991, now seen corresponding path program 116 times [2021-08-21 17:35:39,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:39,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491261894] [2021-08-21 17:35:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:39,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:39,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:39,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491261894] [2021-08-21 17:35:39,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491261894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:39,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32992532] [2021-08-21 17:35:39,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:39,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:39,892 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:39,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 17:35:40,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:40,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:40,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32992532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:40,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:40,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:40,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290822636] [2021-08-21 17:35:40,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:40,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:40,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:40,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:40,934 INFO L87 Difference]: Start difference. First operand 11225 states and 24084 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:41,071 INFO L93 Difference]: Finished difference Result 13579 states and 28927 transitions. [2021-08-21 17:35:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:35:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:35:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:41,097 INFO L225 Difference]: With dead ends: 13579 [2021-08-21 17:35:41,097 INFO L226 Difference]: Without dead ends: 13579 [2021-08-21 17:35:41,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:35:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13579 states. [2021-08-21 17:35:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13579 to 12031. [2021-08-21 17:35:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12031 states, 12030 states have (on average 2.1539484621778886) internal successors, (25912), 12030 states have internal predecessors, (25912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 25912 transitions. [2021-08-21 17:35:41,299 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 25912 transitions. Word has length 22 [2021-08-21 17:35:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:41,299 INFO L470 AbstractCegarLoop]: Abstraction has 12031 states and 25912 transitions. [2021-08-21 17:35:41,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 25912 transitions. [2021-08-21 17:35:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:41,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:41,325 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:41,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:41,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:41,538 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash -2042439717, now seen corresponding path program 117 times [2021-08-21 17:35:41,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:41,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093826367] [2021-08-21 17:35:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:41,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:41,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:41,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093826367] [2021-08-21 17:35:41,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093826367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:41,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777719495] [2021-08-21 17:35:41,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:41,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:41,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:41,620 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:41,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 17:35:42,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:35:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:42,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777719495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:42,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:42,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:35:42,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881874196] [2021-08-21 17:35:42,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:42,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:42,532 INFO L87 Difference]: Start difference. First operand 12031 states and 25912 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:42,656 INFO L93 Difference]: Finished difference Result 14440 states and 30709 transitions. [2021-08-21 17:35:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:35:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:42,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:42,675 INFO L225 Difference]: With dead ends: 14440 [2021-08-21 17:35:42,676 INFO L226 Difference]: Without dead ends: 14440 [2021-08-21 17:35:42,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:35:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14440 states. [2021-08-21 17:35:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14440 to 6053. [2021-08-21 17:35:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6053 states, 6052 states have (on average 2.1336748182419036) internal successors, (12913), 6052 states have internal predecessors, (12913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 12913 transitions. [2021-08-21 17:35:42,803 INFO L78 Accepts]: Start accepts. Automaton has 6053 states and 12913 transitions. Word has length 22 [2021-08-21 17:35:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:42,803 INFO L470 AbstractCegarLoop]: Abstraction has 6053 states and 12913 transitions. [2021-08-21 17:35:42,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6053 states and 12913 transitions. [2021-08-21 17:35:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:42,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:42,808 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:42,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:43,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:43,026 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1179442199, now seen corresponding path program 118 times [2021-08-21 17:35:43,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:43,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144138351] [2021-08-21 17:35:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:43,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:43,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:43,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144138351] [2021-08-21 17:35:43,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144138351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:43,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631593733] [2021-08-21 17:35:43,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:43,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:43,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:43,113 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:43,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 17:35:43,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:43,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631593733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:43,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:43,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:35:43,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002976186] [2021-08-21 17:35:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:43,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:43,979 INFO L87 Difference]: Start difference. First operand 6053 states and 12913 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:44,188 INFO L93 Difference]: Finished difference Result 9078 states and 19169 transitions. [2021-08-21 17:35:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:35:44,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:44,198 INFO L225 Difference]: With dead ends: 9078 [2021-08-21 17:35:44,198 INFO L226 Difference]: Without dead ends: 9078 [2021-08-21 17:35:44,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=217, Invalid=383, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9078 states. [2021-08-21 17:35:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9078 to 6075. [2021-08-21 17:35:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6075 states, 6074 states have (on average 2.1358248271320384) internal successors, (12973), 6074 states have internal predecessors, (12973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 12973 transitions. [2021-08-21 17:35:44,295 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 12973 transitions. Word has length 22 [2021-08-21 17:35:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 6075 states and 12973 transitions. [2021-08-21 17:35:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 12973 transitions. [2021-08-21 17:35:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:44,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:44,302 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:44,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:44,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:44,520 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash 327953841, now seen corresponding path program 119 times [2021-08-21 17:35:44,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:44,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418120741] [2021-08-21 17:35:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:44,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:44,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:44,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418120741] [2021-08-21 17:35:44,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418120741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:44,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674558992] [2021-08-21 17:35:44,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:44,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:44,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:44,598 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:44,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 17:35:45,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:35:45,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:45,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674558992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:45,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:45,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:45,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091785538] [2021-08-21 17:35:45,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:45,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:45,469 INFO L87 Difference]: Start difference. First operand 6075 states and 12973 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:45,601 INFO L93 Difference]: Finished difference Result 6194 states and 13134 transitions. [2021-08-21 17:35:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:45,611 INFO L225 Difference]: With dead ends: 6194 [2021-08-21 17:35:45,611 INFO L226 Difference]: Without dead ends: 6192 [2021-08-21 17:35:45,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:35:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2021-08-21 17:35:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 5978. [2021-08-21 17:35:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.1326752551447212) internal successors, (12747), 5977 states have internal predecessors, (12747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 12747 transitions. [2021-08-21 17:35:45,699 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 12747 transitions. Word has length 22 [2021-08-21 17:35:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:45,699 INFO L470 AbstractCegarLoop]: Abstraction has 5978 states and 12747 transitions. [2021-08-21 17:35:45,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 12747 transitions. [2021-08-21 17:35:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:45,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:45,705 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:45,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:45,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 17:35:45,924 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1390389865, now seen corresponding path program 120 times [2021-08-21 17:35:45,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:45,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997617483] [2021-08-21 17:35:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:45,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:46,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:46,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997617483] [2021-08-21 17:35:46,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997617483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:46,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848482105] [2021-08-21 17:35:46,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:46,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:46,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:46,001 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:46,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 17:35:46,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:35:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:46,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:46,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848482105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:46,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:46,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:35:46,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59407634] [2021-08-21 17:35:46,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:46,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:46,904 INFO L87 Difference]: Start difference. First operand 5978 states and 12747 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:46,979 INFO L93 Difference]: Finished difference Result 6318 states and 13333 transitions. [2021-08-21 17:35:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:35:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:46,986 INFO L225 Difference]: With dead ends: 6318 [2021-08-21 17:35:46,987 INFO L226 Difference]: Without dead ends: 6318 [2021-08-21 17:35:46,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2021-08-21 17:35:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 5977. [2021-08-21 17:35:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 2.1310240963855422) internal successors, (12735), 5976 states have internal predecessors, (12735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 12735 transitions. [2021-08-21 17:35:47,059 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 12735 transitions. Word has length 22 [2021-08-21 17:35:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:47,059 INFO L470 AbstractCegarLoop]: Abstraction has 5977 states and 12735 transitions. [2021-08-21 17:35:47,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 12735 transitions. [2021-08-21 17:35:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:47,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:47,065 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:47,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:47,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 17:35:47,283 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash 320223443, now seen corresponding path program 121 times [2021-08-21 17:35:47,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:47,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263300927] [2021-08-21 17:35:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:47,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:47,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:47,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263300927] [2021-08-21 17:35:47,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263300927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:47,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814411900] [2021-08-21 17:35:47,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:47,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:47,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:47,362 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:47,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 17:35:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:48,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:35:48,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814411900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:48,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:48,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:35:48,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731510270] [2021-08-21 17:35:48,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:48,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:48,244 INFO L87 Difference]: Start difference. First operand 5977 states and 12735 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:48,349 INFO L93 Difference]: Finished difference Result 6057 states and 12799 transitions. [2021-08-21 17:35:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:35:48,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:48,355 INFO L225 Difference]: With dead ends: 6057 [2021-08-21 17:35:48,356 INFO L226 Difference]: Without dead ends: 6057 [2021-08-21 17:35:48,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:35:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2021-08-21 17:35:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 5945. [2021-08-21 17:35:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5945 states, 5944 states have (on average 2.1285329744279946) internal successors, (12652), 5944 states have internal predecessors, (12652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5945 states to 5945 states and 12652 transitions. [2021-08-21 17:35:48,423 INFO L78 Accepts]: Start accepts. Automaton has 5945 states and 12652 transitions. Word has length 22 [2021-08-21 17:35:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:48,424 INFO L470 AbstractCegarLoop]: Abstraction has 5945 states and 12652 transitions. [2021-08-21 17:35:48,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5945 states and 12652 transitions. [2021-08-21 17:35:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:48,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:48,429 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:48,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:48,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:48,646 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1809628439, now seen corresponding path program 122 times [2021-08-21 17:35:48,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:48,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575954220] [2021-08-21 17:35:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:48,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:48,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:48,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575954220] [2021-08-21 17:35:48,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575954220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:48,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84985740] [2021-08-21 17:35:48,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:48,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:48,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:48,722 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:48,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 17:35:49,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:49,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:49,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84985740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:49,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:49,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:35:49,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919177180] [2021-08-21 17:35:49,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:49,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:49,616 INFO L87 Difference]: Start difference. First operand 5945 states and 12652 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:49,726 INFO L93 Difference]: Finished difference Result 7061 states and 14800 transitions. [2021-08-21 17:35:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:35:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:49,734 INFO L225 Difference]: With dead ends: 7061 [2021-08-21 17:35:49,734 INFO L226 Difference]: Without dead ends: 7061 [2021-08-21 17:35:49,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:35:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7061 states. [2021-08-21 17:35:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7061 to 5839. [2021-08-21 17:35:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5839 states, 5838 states have (on average 2.1257279890373417) internal successors, (12410), 5838 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5839 states to 5839 states and 12410 transitions. [2021-08-21 17:35:49,810 INFO L78 Accepts]: Start accepts. Automaton has 5839 states and 12410 transitions. Word has length 22 [2021-08-21 17:35:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:49,810 INFO L470 AbstractCegarLoop]: Abstraction has 5839 states and 12410 transitions. [2021-08-21 17:35:49,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 5839 states and 12410 transitions. [2021-08-21 17:35:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:49,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:49,815 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:49,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 17:35:50,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 17:35:50,033 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash 736543059, now seen corresponding path program 123 times [2021-08-21 17:35:50,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:50,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842839296] [2021-08-21 17:35:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:50,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:50,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:50,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842839296] [2021-08-21 17:35:50,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842839296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:50,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735587005] [2021-08-21 17:35:50,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:50,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:50,114 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:50,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 17:35:50,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:35:50,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735587005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:51,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:51,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:35:51,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357729184] [2021-08-21 17:35:51,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:51,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:51,057 INFO L87 Difference]: Start difference. First operand 5839 states and 12410 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:51,176 INFO L93 Difference]: Finished difference Result 9243 states and 19554 transitions. [2021-08-21 17:35:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:35:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:51,188 INFO L225 Difference]: With dead ends: 9243 [2021-08-21 17:35:51,188 INFO L226 Difference]: Without dead ends: 9243 [2021-08-21 17:35:51,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:35:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9243 states. [2021-08-21 17:35:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9243 to 6781. [2021-08-21 17:35:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.1287610619469026) internal successors, (14433), 6780 states have internal predecessors, (14433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 14433 transitions. [2021-08-21 17:35:51,312 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 14433 transitions. Word has length 22 [2021-08-21 17:35:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:51,313 INFO L470 AbstractCegarLoop]: Abstraction has 6781 states and 14433 transitions. [2021-08-21 17:35:51,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 14433 transitions. [2021-08-21 17:35:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:51,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:51,319 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:51,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:51,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 17:35:51,528 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1830634647, now seen corresponding path program 124 times [2021-08-21 17:35:51,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:51,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469891171] [2021-08-21 17:35:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:51,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:51,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:51,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469891171] [2021-08-21 17:35:51,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469891171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:51,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484216778] [2021-08-21 17:35:51,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:51,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:51,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:51,626 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:51,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 17:35:52,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:52,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:52,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:52,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484216778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:52,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:52,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:35:52,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274545835] [2021-08-21 17:35:52,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:52,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:52,598 INFO L87 Difference]: Start difference. First operand 6781 states and 14433 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:52,812 INFO L93 Difference]: Finished difference Result 10859 states and 22824 transitions. [2021-08-21 17:35:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:52,825 INFO L225 Difference]: With dead ends: 10859 [2021-08-21 17:35:52,825 INFO L226 Difference]: Without dead ends: 10859 [2021-08-21 17:35:52,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:35:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2021-08-21 17:35:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 8751. [2021-08-21 17:35:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 8750 states have (on average 2.1330285714285715) internal successors, (18664), 8750 states have internal predecessors, (18664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 18664 transitions. [2021-08-21 17:35:52,949 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 18664 transitions. Word has length 22 [2021-08-21 17:35:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:52,949 INFO L470 AbstractCegarLoop]: Abstraction has 8751 states and 18664 transitions. [2021-08-21 17:35:52,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 18664 transitions. [2021-08-21 17:35:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:52,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:52,956 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:52,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:53,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 17:35:53,174 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1072817419, now seen corresponding path program 125 times [2021-08-21 17:35:53,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:53,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600067300] [2021-08-21 17:35:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:53,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:35:53,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:53,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600067300] [2021-08-21 17:35:53,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600067300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:53,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458508511] [2021-08-21 17:35:53,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:53,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:53,239 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:53,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 17:35:54,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:35:54,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:35:54,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458508511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:54,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:54,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 17:35:54,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900606403] [2021-08-21 17:35:54,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:35:54,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:35:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:35:54,154 INFO L87 Difference]: Start difference. First operand 8751 states and 18664 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:54,273 INFO L93 Difference]: Finished difference Result 8988 states and 19121 transitions. [2021-08-21 17:35:54,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:35:54,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:35:54,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:54,284 INFO L225 Difference]: With dead ends: 8988 [2021-08-21 17:35:54,284 INFO L226 Difference]: Without dead ends: 8986 [2021-08-21 17:35:54,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:35:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8986 states. [2021-08-21 17:35:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8986 to 8938. [2021-08-21 17:35:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8938 states, 8937 states have (on average 2.133937562940584) internal successors, (19071), 8937 states have internal predecessors, (19071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8938 states to 8938 states and 19071 transitions. [2021-08-21 17:35:54,442 INFO L78 Accepts]: Start accepts. Automaton has 8938 states and 19071 transitions. Word has length 22 [2021-08-21 17:35:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:54,442 INFO L470 AbstractCegarLoop]: Abstraction has 8938 states and 19071 transitions. [2021-08-21 17:35:54,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8938 states and 19071 transitions. [2021-08-21 17:35:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:54,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:54,451 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:54,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:54,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 17:35:54,665 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1262770507, now seen corresponding path program 126 times [2021-08-21 17:35:54,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:54,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680100688] [2021-08-21 17:35:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:54,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:54,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:54,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680100688] [2021-08-21 17:35:54,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680100688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:54,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362725410] [2021-08-21 17:35:54,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:54,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:54,745 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:54,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 17:35:55,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 17:35:55,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:55,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:55,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362725410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:55,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:55,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:35:55,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688851502] [2021-08-21 17:35:55,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:55,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:55,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:55,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:55,583 INFO L87 Difference]: Start difference. First operand 8938 states and 19071 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:55,729 INFO L93 Difference]: Finished difference Result 11701 states and 24642 transitions. [2021-08-21 17:35:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:35:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:55,745 INFO L225 Difference]: With dead ends: 11701 [2021-08-21 17:35:55,745 INFO L226 Difference]: Without dead ends: 11701 [2021-08-21 17:35:55,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11701 states. [2021-08-21 17:35:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11701 to 9492. [2021-08-21 17:35:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9492 states, 9491 states have (on average 2.138973764619113) internal successors, (20301), 9491 states have internal predecessors, (20301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9492 states to 9492 states and 20301 transitions. [2021-08-21 17:35:55,888 INFO L78 Accepts]: Start accepts. Automaton has 9492 states and 20301 transitions. Word has length 22 [2021-08-21 17:35:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:55,888 INFO L470 AbstractCegarLoop]: Abstraction has 9492 states and 20301 transitions. [2021-08-21 17:35:55,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9492 states and 20301 transitions. [2021-08-21 17:35:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:55,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:55,896 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:55,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:56,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:56,113 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:56,113 INFO L82 PathProgramCache]: Analyzing trace with hash 819871367, now seen corresponding path program 127 times [2021-08-21 17:35:56,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:56,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485300543] [2021-08-21 17:35:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:56,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:56,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:56,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485300543] [2021-08-21 17:35:56,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485300543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:56,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842589495] [2021-08-21 17:35:56,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:56,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:56,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:56,218 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:56,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 17:35:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842589495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:57,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:57,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:35:57,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322742759] [2021-08-21 17:35:57,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:57,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:57,174 INFO L87 Difference]: Start difference. First operand 9492 states and 20301 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:57,322 INFO L93 Difference]: Finished difference Result 12182 states and 25630 transitions. [2021-08-21 17:35:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:35:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:57,340 INFO L225 Difference]: With dead ends: 12182 [2021-08-21 17:35:57,340 INFO L226 Difference]: Without dead ends: 12182 [2021-08-21 17:35:57,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:35:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12182 states. [2021-08-21 17:35:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12182 to 5668. [2021-08-21 17:35:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5668 states, 5667 states have (on average 2.1256396682548084) internal successors, (12046), 5667 states have internal predecessors, (12046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5668 states to 5668 states and 12046 transitions. [2021-08-21 17:35:57,459 INFO L78 Accepts]: Start accepts. Automaton has 5668 states and 12046 transitions. Word has length 22 [2021-08-21 17:35:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:57,459 INFO L470 AbstractCegarLoop]: Abstraction has 5668 states and 12046 transitions. [2021-08-21 17:35:57,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 5668 states and 12046 transitions. [2021-08-21 17:35:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:57,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:57,464 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:57,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 17:35:57,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:57,669 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1913962955, now seen corresponding path program 128 times [2021-08-21 17:35:57,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:57,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878484947] [2021-08-21 17:35:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:57,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:57,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:57,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878484947] [2021-08-21 17:35:57,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878484947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:57,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114266944] [2021-08-21 17:35:57,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:57,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:57,776 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:57,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 17:35:58,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:58,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:35:58,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:58,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114266944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:58,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:58,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:35:58,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910586276] [2021-08-21 17:35:58,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:58,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:58,734 INFO L87 Difference]: Start difference. First operand 5668 states and 12046 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:58,933 INFO L93 Difference]: Finished difference Result 9068 states and 18979 transitions. [2021-08-21 17:35:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:35:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:58,945 INFO L225 Difference]: With dead ends: 9068 [2021-08-21 17:35:58,945 INFO L226 Difference]: Without dead ends: 9068 [2021-08-21 17:35:58,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:35:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9068 states. [2021-08-21 17:35:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9068 to 5445. [2021-08-21 17:35:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5445 states, 5444 states have (on average 2.1302351212343864) internal successors, (11597), 5444 states have internal predecessors, (11597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5445 states to 5445 states and 11597 transitions. [2021-08-21 17:35:59,036 INFO L78 Accepts]: Start accepts. Automaton has 5445 states and 11597 transitions. Word has length 22 [2021-08-21 17:35:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:59,036 INFO L470 AbstractCegarLoop]: Abstraction has 5445 states and 11597 transitions. [2021-08-21 17:35:59,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5445 states and 11597 transitions. [2021-08-21 17:35:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:35:59,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:59,040 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:59,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 17:35:59,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-21 17:35:59,245 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:35:59,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash -433689303, now seen corresponding path program 129 times [2021-08-21 17:35:59,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:59,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410717942] [2021-08-21 17:35:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:59,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:59,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:59,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410717942] [2021-08-21 17:35:59,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410717942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:59,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862789323] [2021-08-21 17:35:59,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:59,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:59,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:59,309 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:35:59,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 17:36:00,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:36:00,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:00,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862789323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:00,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:00,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:36:00,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603532635] [2021-08-21 17:36:00,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:00,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:00,286 INFO L87 Difference]: Start difference. First operand 5445 states and 11597 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:00,394 INFO L93 Difference]: Finished difference Result 5560 states and 11753 transitions. [2021-08-21 17:36:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:36:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:00,400 INFO L225 Difference]: With dead ends: 5560 [2021-08-21 17:36:00,400 INFO L226 Difference]: Without dead ends: 5558 [2021-08-21 17:36:00,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:36:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5558 states. [2021-08-21 17:36:00,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5558 to 5390. [2021-08-21 17:36:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5390 states, 5389 states have (on average 2.1276674707737984) internal successors, (11466), 5389 states have internal predecessors, (11466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 11466 transitions. [2021-08-21 17:36:00,467 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 11466 transitions. Word has length 22 [2021-08-21 17:36:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:00,467 INFO L470 AbstractCegarLoop]: Abstraction has 5390 states and 11466 transitions. [2021-08-21 17:36:00,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 11466 transitions. [2021-08-21 17:36:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:00,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:00,472 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:00,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:00,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:00,687 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2142934287, now seen corresponding path program 130 times [2021-08-21 17:36:00,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:00,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662835614] [2021-08-21 17:36:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:00,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:00,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:00,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662835614] [2021-08-21 17:36:00,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662835614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:00,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869412912] [2021-08-21 17:36:00,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:00,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:00,751 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:00,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 17:36:01,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:36:01,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:01,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:01,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869412912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:01,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:01,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:36:01,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982229111] [2021-08-21 17:36:01,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:01,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:01,703 INFO L87 Difference]: Start difference. First operand 5390 states and 11466 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:01,775 INFO L93 Difference]: Finished difference Result 5794 states and 12193 transitions. [2021-08-21 17:36:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:36:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:01,781 INFO L225 Difference]: With dead ends: 5794 [2021-08-21 17:36:01,781 INFO L226 Difference]: Without dead ends: 5794 [2021-08-21 17:36:01,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:36:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5794 states. [2021-08-21 17:36:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5794 to 5396. [2021-08-21 17:36:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5396 states, 5395 states have (on average 2.1275254865616313) internal successors, (11478), 5395 states have internal predecessors, (11478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5396 states to 5396 states and 11478 transitions. [2021-08-21 17:36:01,862 INFO L78 Accepts]: Start accepts. Automaton has 5396 states and 11478 transitions. Word has length 22 [2021-08-21 17:36:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 5396 states and 11478 transitions. [2021-08-21 17:36:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5396 states and 11478 transitions. [2021-08-21 17:36:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:01,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:01,867 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:01,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 17:36:02,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:02,087 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash -441419701, now seen corresponding path program 131 times [2021-08-21 17:36:02,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:02,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224220942] [2021-08-21 17:36:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:02,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:02,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:02,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224220942] [2021-08-21 17:36:02,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224220942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:02,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889003951] [2021-08-21 17:36:02,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:02,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:02,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:02,172 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 17:36:03,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:36:03,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:03,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889003951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:03,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:03,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:36:03,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643905298] [2021-08-21 17:36:03,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:03,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:03,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:03,179 INFO L87 Difference]: Start difference. First operand 5396 states and 11478 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:03,262 INFO L93 Difference]: Finished difference Result 5876 states and 12347 transitions. [2021-08-21 17:36:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:36:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:03,268 INFO L225 Difference]: With dead ends: 5876 [2021-08-21 17:36:03,268 INFO L226 Difference]: Without dead ends: 5876 [2021-08-21 17:36:03,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:36:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-08-21 17:36:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 5328. [2021-08-21 17:36:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 2.125586634128027) internal successors, (11323), 5327 states have internal predecessors, (11323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 11323 transitions. [2021-08-21 17:36:03,329 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 11323 transitions. Word has length 22 [2021-08-21 17:36:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:03,330 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 11323 transitions. [2021-08-21 17:36:03,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 11323 transitions. [2021-08-21 17:36:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:03,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:03,333 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:03,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:03,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 17:36:03,537 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1047985295, now seen corresponding path program 132 times [2021-08-21 17:36:03,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:03,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81263395] [2021-08-21 17:36:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:03,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:03,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:03,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81263395] [2021-08-21 17:36:03,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81263395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:03,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704935725] [2021-08-21 17:36:03,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:36:03,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:03,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:03,624 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:03,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 17:36:04,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:36:04,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:04,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:04,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704935725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:04,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:04,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:36:04,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396706652] [2021-08-21 17:36:04,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:04,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:04,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:04,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:04,631 INFO L87 Difference]: Start difference. First operand 5328 states and 11323 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:04,711 INFO L93 Difference]: Finished difference Result 9252 states and 19673 transitions. [2021-08-21 17:36:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:36:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:04,722 INFO L225 Difference]: With dead ends: 9252 [2021-08-21 17:36:04,723 INFO L226 Difference]: Without dead ends: 9252 [2021-08-21 17:36:04,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:36:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9252 states. [2021-08-21 17:36:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9252 to 9150. [2021-08-21 17:36:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 2.135424636572303) internal successors, (19537), 9149 states have internal predecessors, (19537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 19537 transitions. [2021-08-21 17:36:04,838 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 19537 transitions. Word has length 22 [2021-08-21 17:36:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:04,838 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 19537 transitions. [2021-08-21 17:36:04,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 19537 transitions. [2021-08-21 17:36:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:04,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:04,845 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:04,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:05,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 17:36:05,063 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash -25100085, now seen corresponding path program 133 times [2021-08-21 17:36:05,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:05,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098516043] [2021-08-21 17:36:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:05,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:05,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:05,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098516043] [2021-08-21 17:36:05,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098516043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:05,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929119166] [2021-08-21 17:36:05,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:05,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:05,145 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:05,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 17:36:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:06,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:06,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929119166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:06,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:06,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:36:06,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735435012] [2021-08-21 17:36:06,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:06,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:06,117 INFO L87 Difference]: Start difference. First operand 9150 states and 19537 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:06,243 INFO L93 Difference]: Finished difference Result 9871 states and 20904 transitions. [2021-08-21 17:36:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:36:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:06,256 INFO L225 Difference]: With dead ends: 9871 [2021-08-21 17:36:06,256 INFO L226 Difference]: Without dead ends: 9871 [2021-08-21 17:36:06,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:36:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9871 states. [2021-08-21 17:36:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9871 to 8093. [2021-08-21 17:36:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8093 states, 8092 states have (on average 2.1396440929312903) internal successors, (17314), 8092 states have internal predecessors, (17314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8093 states to 8093 states and 17314 transitions. [2021-08-21 17:36:06,410 INFO L78 Accepts]: Start accepts. Automaton has 8093 states and 17314 transitions. Word has length 22 [2021-08-21 17:36:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:06,410 INFO L470 AbstractCegarLoop]: Abstraction has 8093 states and 17314 transitions. [2021-08-21 17:36:06,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 8093 states and 17314 transitions. [2021-08-21 17:36:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:06,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:06,416 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:06,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:06,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 17:36:06,634 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1068991503, now seen corresponding path program 134 times [2021-08-21 17:36:06,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:06,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010741769] [2021-08-21 17:36:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:06,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:06,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:06,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010741769] [2021-08-21 17:36:06,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010741769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:06,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693772829] [2021-08-21 17:36:06,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:36:06,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:06,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:06,718 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:06,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 17:36:07,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:36:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:07,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693772829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:07,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:07,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:36:07,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075941111] [2021-08-21 17:36:07,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:07,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:07,674 INFO L87 Difference]: Start difference. First operand 8093 states and 17314 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:07,861 INFO L93 Difference]: Finished difference Result 13750 states and 29242 transitions. [2021-08-21 17:36:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:36:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:07,917 INFO L225 Difference]: With dead ends: 13750 [2021-08-21 17:36:07,918 INFO L226 Difference]: Without dead ends: 13750 [2021-08-21 17:36:07,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:36:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13750 states. [2021-08-21 17:36:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13750 to 12949. [2021-08-21 17:36:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12949 states, 12948 states have (on average 2.138863144887241) internal successors, (27694), 12948 states have internal predecessors, (27694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12949 states to 12949 states and 27694 transitions. [2021-08-21 17:36:08,244 INFO L78 Accepts]: Start accepts. Automaton has 12949 states and 27694 transitions. Word has length 22 [2021-08-21 17:36:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:08,244 INFO L470 AbstractCegarLoop]: Abstraction has 12949 states and 27694 transitions. [2021-08-21 17:36:08,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12949 states and 27694 transitions. [2021-08-21 17:36:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:08,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:08,254 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:08,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:08,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:08,473 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash 626092363, now seen corresponding path program 135 times [2021-08-21 17:36:08,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:08,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104245540] [2021-08-21 17:36:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:08,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:08,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:08,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104245540] [2021-08-21 17:36:08,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104245540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:08,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339640238] [2021-08-21 17:36:08,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:36:08,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:08,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:08,559 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:08,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 17:36:09,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:36:09,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:09,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339640238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:09,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:09,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:36:09,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005191152] [2021-08-21 17:36:09,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:09,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:09,551 INFO L87 Difference]: Start difference. First operand 12949 states and 27694 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:09,841 INFO L93 Difference]: Finished difference Result 18622 states and 39576 transitions. [2021-08-21 17:36:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:36:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:09,869 INFO L225 Difference]: With dead ends: 18622 [2021-08-21 17:36:09,869 INFO L226 Difference]: Without dead ends: 18622 [2021-08-21 17:36:09,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=411, Invalid=779, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:36:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18622 states. [2021-08-21 17:36:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18622 to 16971. [2021-08-21 17:36:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16971 states, 16970 states have (on average 2.1396582203889216) internal successors, (36310), 16970 states have internal predecessors, (36310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16971 states to 16971 states and 36310 transitions. [2021-08-21 17:36:10,205 INFO L78 Accepts]: Start accepts. Automaton has 16971 states and 36310 transitions. Word has length 22 [2021-08-21 17:36:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:10,205 INFO L470 AbstractCegarLoop]: Abstraction has 16971 states and 36310 transitions. [2021-08-21 17:36:10,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16971 states and 36310 transitions. [2021-08-21 17:36:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:10,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:10,215 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:10,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:10,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 17:36:10,429 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:10,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:10,429 INFO L82 PathProgramCache]: Analyzing trace with hash 202173207, now seen corresponding path program 136 times [2021-08-21 17:36:10,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:10,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248617312] [2021-08-21 17:36:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:10,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:10,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:10,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248617312] [2021-08-21 17:36:10,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248617312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:10,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17089769] [2021-08-21 17:36:10,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:10,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:10,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:10,507 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:10,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 17:36:11,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:36:11,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:11,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17089769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:11,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:11,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:36:11,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16170909] [2021-08-21 17:36:11,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:11,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:11,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:11,420 INFO L87 Difference]: Start difference. First operand 16971 states and 36310 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:11,659 INFO L93 Difference]: Finished difference Result 23303 states and 49103 transitions. [2021-08-21 17:36:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:36:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:11,695 INFO L225 Difference]: With dead ends: 23303 [2021-08-21 17:36:11,695 INFO L226 Difference]: Without dead ends: 23303 [2021-08-21 17:36:11,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:36:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23303 states. [2021-08-21 17:36:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23303 to 13273. [2021-08-21 17:36:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 13272 states have (on average 2.1414255575647982) internal successors, (28421), 13272 states have internal predecessors, (28421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 28421 transitions. [2021-08-21 17:36:12,074 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 28421 transitions. Word has length 22 [2021-08-21 17:36:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:12,074 INFO L470 AbstractCegarLoop]: Abstraction has 13273 states and 28421 transitions. [2021-08-21 17:36:12,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 28421 transitions. [2021-08-21 17:36:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:12,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:12,082 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:12,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:12,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 17:36:12,297 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash -642798245, now seen corresponding path program 137 times [2021-08-21 17:36:12,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:12,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644327162] [2021-08-21 17:36:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:12,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:12,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:12,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644327162] [2021-08-21 17:36:12,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644327162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:12,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753709389] [2021-08-21 17:36:12,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:12,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:12,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:12,378 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:12,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 17:36:13,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:36:13,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:13,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753709389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:13,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:13,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:36:13,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497103119] [2021-08-21 17:36:13,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:13,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:13,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:13,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:13,352 INFO L87 Difference]: Start difference. First operand 13273 states and 28421 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:13,565 INFO L93 Difference]: Finished difference Result 20139 states and 42881 transitions. [2021-08-21 17:36:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:36:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:13,718 INFO L225 Difference]: With dead ends: 20139 [2021-08-21 17:36:13,718 INFO L226 Difference]: Without dead ends: 20139 [2021-08-21 17:36:13,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:36:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20139 states. [2021-08-21 17:36:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20139 to 18481. [2021-08-21 17:36:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18481 states, 18480 states have (on average 2.1432359307359308) internal successors, (39607), 18480 states have internal predecessors, (39607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18481 states to 18481 states and 39607 transitions. [2021-08-21 17:36:14,048 INFO L78 Accepts]: Start accepts. Automaton has 18481 states and 39607 transitions. Word has length 22 [2021-08-21 17:36:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:14,049 INFO L470 AbstractCegarLoop]: Abstraction has 18481 states and 39607 transitions. [2021-08-21 17:36:14,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 18481 states and 39607 transitions. [2021-08-21 17:36:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:14,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:14,058 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:14,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:14,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:14,277 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1085697385, now seen corresponding path program 138 times [2021-08-21 17:36:14,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:14,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918876187] [2021-08-21 17:36:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:14,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:14,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:14,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918876187] [2021-08-21 17:36:14,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918876187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:14,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275876504] [2021-08-21 17:36:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:36:14,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:14,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:14,369 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:14,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 17:36:15,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:36:15,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:15,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275876504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:15,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:15,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:36:15,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834383670] [2021-08-21 17:36:15,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:15,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:15,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:15,397 INFO L87 Difference]: Start difference. First operand 18481 states and 39607 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:15,692 INFO L93 Difference]: Finished difference Result 27671 states and 58962 transitions. [2021-08-21 17:36:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:36:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:15,737 INFO L225 Difference]: With dead ends: 27671 [2021-08-21 17:36:15,737 INFO L226 Difference]: Without dead ends: 27671 [2021-08-21 17:36:15,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:36:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27671 states. [2021-08-21 17:36:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27671 to 26261. [2021-08-21 17:36:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26261 states, 26260 states have (on average 2.139032749428789) internal successors, (56171), 26260 states have internal predecessors, (56171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26261 states to 26261 states and 56171 transitions. [2021-08-21 17:36:16,235 INFO L78 Accepts]: Start accepts. Automaton has 26261 states and 56171 transitions. Word has length 22 [2021-08-21 17:36:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:16,235 INFO L470 AbstractCegarLoop]: Abstraction has 26261 states and 56171 transitions. [2021-08-21 17:36:16,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26261 states and 56171 transitions. [2021-08-21 17:36:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:16,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:16,245 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:16,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:16,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:16,464 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:16,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1725177009, now seen corresponding path program 139 times [2021-08-21 17:36:16,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:16,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325287634] [2021-08-21 17:36:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:16,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:16,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:16,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325287634] [2021-08-21 17:36:16,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325287634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:16,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326553616] [2021-08-21 17:36:16,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:16,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:16,536 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:16,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 17:36:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:17,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326553616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:17,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:17,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:36:17,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863683722] [2021-08-21 17:36:17,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:17,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:17,515 INFO L87 Difference]: Start difference. First operand 26261 states and 56171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:17,684 INFO L93 Difference]: Finished difference Result 26525 states and 56661 transitions. [2021-08-21 17:36:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:36:17,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:17,893 INFO L225 Difference]: With dead ends: 26525 [2021-08-21 17:36:17,893 INFO L226 Difference]: Without dead ends: 26523 [2021-08-21 17:36:17,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:36:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26523 states. [2021-08-21 17:36:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26523 to 24695. [2021-08-21 17:36:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24695 states, 24694 states have (on average 2.134445614319268) internal successors, (52708), 24694 states have internal predecessors, (52708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24695 states to 24695 states and 52708 transitions. [2021-08-21 17:36:18,249 INFO L78 Accepts]: Start accepts. Automaton has 24695 states and 52708 transitions. Word has length 22 [2021-08-21 17:36:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:18,249 INFO L470 AbstractCegarLoop]: Abstraction has 24695 states and 52708 transitions. [2021-08-21 17:36:18,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24695 states and 52708 transitions. [2021-08-21 17:36:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:18,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:18,258 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:18,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:18,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:18,475 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash 6833303, now seen corresponding path program 140 times [2021-08-21 17:36:18,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:18,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435640270] [2021-08-21 17:36:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:18,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:18,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:18,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435640270] [2021-08-21 17:36:18,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435640270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:18,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216654011] [2021-08-21 17:36:18,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:36:18,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:18,541 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:18,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 17:36:19,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:36:19,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:19,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216654011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:19,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:19,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:36:19,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172930162] [2021-08-21 17:36:19,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:19,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:19,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:19,607 INFO L87 Difference]: Start difference. First operand 24695 states and 52708 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:19,744 INFO L93 Difference]: Finished difference Result 26383 states and 55973 transitions. [2021-08-21 17:36:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:36:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:19,784 INFO L225 Difference]: With dead ends: 26383 [2021-08-21 17:36:19,784 INFO L226 Difference]: Without dead ends: 26383 [2021-08-21 17:36:19,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:36:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26383 states. [2021-08-21 17:36:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26383 to 24737. [2021-08-21 17:36:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24737 states, 24736 states have (on average 2.133044954721863) internal successors, (52763), 24736 states have internal predecessors, (52763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24737 states to 24737 states and 52763 transitions. [2021-08-21 17:36:20,207 INFO L78 Accepts]: Start accepts. Automaton has 24737 states and 52763 transitions. Word has length 22 [2021-08-21 17:36:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:20,207 INFO L470 AbstractCegarLoop]: Abstraction has 24737 states and 52763 transitions. [2021-08-21 17:36:20,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 24737 states and 52763 transitions. [2021-08-21 17:36:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:20,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:20,217 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:20,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:20,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:20,429 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:20,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1717446611, now seen corresponding path program 141 times [2021-08-21 17:36:20,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:20,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006847361] [2021-08-21 17:36:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:20,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:20,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:20,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006847361] [2021-08-21 17:36:20,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006847361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:20,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501755745] [2021-08-21 17:36:20,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:36:20,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:20,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:20,503 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:20,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 17:36:21,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:36:21,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:21,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501755745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:21,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:21,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:36:21,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33701294] [2021-08-21 17:36:21,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:21,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:21,638 INFO L87 Difference]: Start difference. First operand 24737 states and 52763 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:21,817 INFO L93 Difference]: Finished difference Result 27537 states and 58255 transitions. [2021-08-21 17:36:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:36:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:21,865 INFO L225 Difference]: With dead ends: 27537 [2021-08-21 17:36:21,865 INFO L226 Difference]: Without dead ends: 27537 [2021-08-21 17:36:21,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:36:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27537 states. [2021-08-21 17:36:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27537 to 21603. [2021-08-21 17:36:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21603 states, 21602 states have (on average 2.1290158318674197) internal successors, (45991), 21602 states have internal predecessors, (45991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21603 states to 21603 states and 45991 transitions. [2021-08-21 17:36:22,353 INFO L78 Accepts]: Start accepts. Automaton has 21603 states and 45991 transitions. Word has length 22 [2021-08-21 17:36:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:22,354 INFO L470 AbstractCegarLoop]: Abstraction has 21603 states and 45991 transitions. [2021-08-21 17:36:22,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 21603 states and 45991 transitions. [2021-08-21 17:36:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:22,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:22,363 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:22,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 17:36:22,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 17:36:22,581 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1088115689, now seen corresponding path program 142 times [2021-08-21 17:36:22,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:22,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342565177] [2021-08-21 17:36:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:22,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:22,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:22,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342565177] [2021-08-21 17:36:22,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342565177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:22,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765102929] [2021-08-21 17:36:22,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:22,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:22,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:22,664 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:22,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 17:36:23,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:36:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:23,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765102929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:23,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:23,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:36:23,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101062216] [2021-08-21 17:36:23,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:23,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:23,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:23,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:23,685 INFO L87 Difference]: Start difference. First operand 21603 states and 45991 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:23,871 INFO L93 Difference]: Finished difference Result 39985 states and 85073 transitions. [2021-08-21 17:36:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:36:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:23,941 INFO L225 Difference]: With dead ends: 39985 [2021-08-21 17:36:23,941 INFO L226 Difference]: Without dead ends: 39985 [2021-08-21 17:36:23,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:36:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39985 states. [2021-08-21 17:36:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39985 to 31540. [2021-08-21 17:36:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31540 states, 31539 states have (on average 2.1413805130156316) internal successors, (67537), 31539 states have internal predecessors, (67537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31540 states to 31540 states and 67537 transitions. [2021-08-21 17:36:24,717 INFO L78 Accepts]: Start accepts. Automaton has 31540 states and 67537 transitions. Word has length 22 [2021-08-21 17:36:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:24,717 INFO L470 AbstractCegarLoop]: Abstraction has 31540 states and 67537 transitions. [2021-08-21 17:36:24,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 31540 states and 67537 transitions. [2021-08-21 17:36:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:24,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:24,728 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:24,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:24,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 17:36:24,946 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:24,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2133766227, now seen corresponding path program 143 times [2021-08-21 17:36:24,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:24,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068552589] [2021-08-21 17:36:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:24,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:25,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:25,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068552589] [2021-08-21 17:36:25,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068552589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:25,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292079047] [2021-08-21 17:36:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:25,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:25,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:25,029 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:25,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 17:36:26,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:36:26,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:26,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:26,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292079047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:26,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:26,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:36:26,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636780779] [2021-08-21 17:36:26,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:26,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:26,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:26,216 INFO L87 Difference]: Start difference. First operand 31540 states and 67537 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:26,424 INFO L93 Difference]: Finished difference Result 44932 states and 95765 transitions. [2021-08-21 17:36:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:36:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:26,522 INFO L225 Difference]: With dead ends: 44932 [2021-08-21 17:36:26,522 INFO L226 Difference]: Without dead ends: 44932 [2021-08-21 17:36:26,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:36:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44932 states. [2021-08-21 17:36:27,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44932 to 44817. [2021-08-21 17:36:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44817 states, 44816 states have (on average 2.1326535166012137) internal successors, (95577), 44816 states have internal predecessors, (95577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44817 states to 44817 states and 95577 transitions. [2021-08-21 17:36:27,683 INFO L78 Accepts]: Start accepts. Automaton has 44817 states and 95577 transitions. Word has length 22 [2021-08-21 17:36:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 44817 states and 95577 transitions. [2021-08-21 17:36:27,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 44817 states and 95577 transitions. [2021-08-21 17:36:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:27,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:27,701 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:27,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:27,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 17:36:27,921 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1067109481, now seen corresponding path program 144 times [2021-08-21 17:36:27,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:27,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474699988] [2021-08-21 17:36:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:27,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:28,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:28,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474699988] [2021-08-21 17:36:28,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474699988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:28,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210212511] [2021-08-21 17:36:28,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:36:28,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:28,012 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:28,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 17:36:28,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:36:28,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:28,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:29,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210212511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:29,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:29,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:36:29,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646063684] [2021-08-21 17:36:29,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:29,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:29,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:29,149 INFO L87 Difference]: Start difference. First operand 44817 states and 95577 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:29,522 INFO L93 Difference]: Finished difference Result 45562 states and 97023 transitions. [2021-08-21 17:36:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:36:29,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:29,613 INFO L225 Difference]: With dead ends: 45562 [2021-08-21 17:36:29,614 INFO L226 Difference]: Without dead ends: 45562 [2021-08-21 17:36:29,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:36:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45562 states. [2021-08-21 17:36:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45562 to 44440. [2021-08-21 17:36:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44440 states, 44439 states have (on average 2.133508854834717) internal successors, (94811), 44439 states have internal predecessors, (94811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44440 states to 44440 states and 94811 transitions. [2021-08-21 17:36:30,592 INFO L78 Accepts]: Start accepts. Automaton has 44440 states and 94811 transitions. Word has length 22 [2021-08-21 17:36:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:30,592 INFO L470 AbstractCegarLoop]: Abstraction has 44440 states and 94811 transitions. [2021-08-21 17:36:30,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 44440 states and 94811 transitions. [2021-08-21 17:36:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:30,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:30,608 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:30,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 17:36:30,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:30,828 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1510008621, now seen corresponding path program 145 times [2021-08-21 17:36:30,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:30,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815516196] [2021-08-21 17:36:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:30,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:31,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815516196] [2021-08-21 17:36:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815516196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163163692] [2021-08-21 17:36:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:31,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:31,053 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:31,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 17:36:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:32,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:32,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163163692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:32,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:32,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:36:32,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181831711] [2021-08-21 17:36:32,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:32,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:32,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:32,160 INFO L87 Difference]: Start difference. First operand 44440 states and 94811 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:32,486 INFO L93 Difference]: Finished difference Result 48900 states and 104106 transitions. [2021-08-21 17:36:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:36:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:32,600 INFO L225 Difference]: With dead ends: 48900 [2021-08-21 17:36:32,600 INFO L226 Difference]: Without dead ends: 48900 [2021-08-21 17:36:32,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:36:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48900 states. [2021-08-21 17:36:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48900 to 48592. [2021-08-21 17:36:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48592 states, 48591 states have (on average 2.130250457903727) internal successors, (103511), 48591 states have internal predecessors, (103511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48592 states to 48592 states and 103511 transitions. [2021-08-21 17:36:33,689 INFO L78 Accepts]: Start accepts. Automaton has 48592 states and 103511 transitions. Word has length 22 [2021-08-21 17:36:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:33,690 INFO L470 AbstractCegarLoop]: Abstraction has 48592 states and 103511 transitions. [2021-08-21 17:36:33,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 48592 states and 103511 transitions. [2021-08-21 17:36:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:33,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:33,707 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:33,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-21 17:36:33,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:33,926 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:33,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1939987223, now seen corresponding path program 146 times [2021-08-21 17:36:33,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:33,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341324151] [2021-08-21 17:36:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:33,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:34,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:34,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341324151] [2021-08-21 17:36:34,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341324151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:34,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324789144] [2021-08-21 17:36:34,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:36:34,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:34,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:34,028 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:34,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 17:36:35,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:36:35,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:35,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324789144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:35,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:35,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:36:35,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785682444] [2021-08-21 17:36:35,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:35,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:35,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:35,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:35,374 INFO L87 Difference]: Start difference. First operand 48592 states and 103511 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:35,810 INFO L93 Difference]: Finished difference Result 51377 states and 109261 transitions. [2021-08-21 17:36:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:36:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:36:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:35,946 INFO L225 Difference]: With dead ends: 51377 [2021-08-21 17:36:35,947 INFO L226 Difference]: Without dead ends: 51377 [2021-08-21 17:36:35,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:36:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51377 states. [2021-08-21 17:36:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51377 to 50954. [2021-08-21 17:36:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50954 states, 50953 states have (on average 2.1280199399446547) internal successors, (108429), 50953 states have internal predecessors, (108429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50954 states to 50954 states and 108429 transitions. [2021-08-21 17:36:37,482 INFO L78 Accepts]: Start accepts. Automaton has 50954 states and 108429 transitions. Word has length 22 [2021-08-21 17:36:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:37,482 INFO L470 AbstractCegarLoop]: Abstraction has 50954 states and 108429 transitions. [2021-08-21 17:36:37,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 50954 states and 108429 transitions. [2021-08-21 17:36:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:37,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:37,501 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:37,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:37,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 17:36:37,711 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:37,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1597139561, now seen corresponding path program 147 times [2021-08-21 17:36:37,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:37,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344019237] [2021-08-21 17:36:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:37,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:37,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:37,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344019237] [2021-08-21 17:36:37,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344019237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:37,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482792175] [2021-08-21 17:36:37,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:36:37,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:37,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:37,790 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:37,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 17:36:38,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:36:38,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:38,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:36:39,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482792175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:39,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:39,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:36:39,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394365501] [2021-08-21 17:36:39,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:39,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:39,040 INFO L87 Difference]: Start difference. First operand 50954 states and 108429 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:39,335 INFO L93 Difference]: Finished difference Result 51566 states and 109690 transitions. [2021-08-21 17:36:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:36:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 17:36:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:39,459 INFO L225 Difference]: With dead ends: 51566 [2021-08-21 17:36:39,459 INFO L226 Difference]: Without dead ends: 51563 [2021-08-21 17:36:39,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:36:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51563 states. [2021-08-21 17:36:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51563 to 51497. [2021-08-21 17:36:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51497 states, 51496 states have (on average 2.1286701879757652) internal successors, (109618), 51496 states have internal predecessors, (109618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51497 states to 51497 states and 109618 transitions. [2021-08-21 17:36:40,705 INFO L78 Accepts]: Start accepts. Automaton has 51497 states and 109618 transitions. Word has length 22 [2021-08-21 17:36:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:40,706 INFO L470 AbstractCegarLoop]: Abstraction has 51497 states and 109618 transitions. [2021-08-21 17:36:40,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 51497 states and 109618 transitions. [2021-08-21 17:36:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:40,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:40,722 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:40,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:40,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:40,941 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2115239311, now seen corresponding path program 148 times [2021-08-21 17:36:40,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:40,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388718762] [2021-08-21 17:36:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:40,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:41,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:41,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388718762] [2021-08-21 17:36:41,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388718762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:41,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963618231] [2021-08-21 17:36:41,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:41,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:41,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:41,018 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:41,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 17:36:42,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:36:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:36:42,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963618231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:42,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:42,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:36:42,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410528597] [2021-08-21 17:36:42,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:42,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:42,409 INFO L87 Difference]: Start difference. First operand 51497 states and 109618 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:42,701 INFO L93 Difference]: Finished difference Result 71108 states and 150368 transitions. [2021-08-21 17:36:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:36:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:36:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:43,016 INFO L225 Difference]: With dead ends: 71108 [2021-08-21 17:36:43,016 INFO L226 Difference]: Without dead ends: 71108 [2021-08-21 17:36:43,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:36:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71108 states. [2021-08-21 17:36:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71108 to 69460. [2021-08-21 17:36:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69460 states, 69459 states have (on average 2.1179976676888526) internal successors, (147114), 69459 states have internal predecessors, (147114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69460 states to 69460 states and 147114 transitions. [2021-08-21 17:36:44,707 INFO L78 Accepts]: Start accepts. Automaton has 69460 states and 147114 transitions. Word has length 22 [2021-08-21 17:36:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:44,707 INFO L470 AbstractCegarLoop]: Abstraction has 69460 states and 147114 transitions. [2021-08-21 17:36:44,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 69460 states and 147114 transitions. [2021-08-21 17:36:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:44,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:44,749 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:44,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:44,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:44,965 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1042153931, now seen corresponding path program 149 times [2021-08-21 17:36:44,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:44,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551303550] [2021-08-21 17:36:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:44,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:45,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:45,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551303550] [2021-08-21 17:36:45,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551303550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:45,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308890606] [2021-08-21 17:36:45,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:45,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:45,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:45,039 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:45,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 17:36:46,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:36:46,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:46,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:46,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308890606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:46,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:36:46,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131618116] [2021-08-21 17:36:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:46,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:46,154 INFO L87 Difference]: Start difference. First operand 69460 states and 147114 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:46,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:46,612 INFO L93 Difference]: Finished difference Result 80734 states and 169390 transitions. [2021-08-21 17:36:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:36:46,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:36:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:46,816 INFO L225 Difference]: With dead ends: 80734 [2021-08-21 17:36:46,816 INFO L226 Difference]: Without dead ends: 80734 [2021-08-21 17:36:46,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:36:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80734 states. [2021-08-21 17:36:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80734 to 70676. [2021-08-21 17:36:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70676 states, 70675 states have (on average 2.1127131234524232) internal successors, (149316), 70675 states have internal predecessors, (149316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70676 states to 70676 states and 149316 transitions. [2021-08-21 17:36:48,973 INFO L78 Accepts]: Start accepts. Automaton has 70676 states and 149316 transitions. Word has length 22 [2021-08-21 17:36:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:48,973 INFO L470 AbstractCegarLoop]: Abstraction has 70676 states and 149316 transitions. [2021-08-21 17:36:48,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 70676 states and 149316 transitions. [2021-08-21 17:36:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:48,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:48,991 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:49,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:49,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:49,210 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:49,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2136245519, now seen corresponding path program 150 times [2021-08-21 17:36:49,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:49,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320408967] [2021-08-21 17:36:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:49,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:49,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:49,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320408967] [2021-08-21 17:36:49,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320408967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:49,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59614360] [2021-08-21 17:36:49,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:36:49,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:49,305 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:49,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 17:36:50,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:36:50,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:50,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:50,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:50,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59614360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:50,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:50,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:36:50,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29462396] [2021-08-21 17:36:50,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:50,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:50,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:50,730 INFO L87 Difference]: Start difference. First operand 70676 states and 149316 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:51,278 INFO L93 Difference]: Finished difference Result 103837 states and 218696 transitions. [2021-08-21 17:36:51,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:36:51,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:36:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:51,556 INFO L225 Difference]: With dead ends: 103837 [2021-08-21 17:36:51,556 INFO L226 Difference]: Without dead ends: 103837 [2021-08-21 17:36:51,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:36:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103837 states. [2021-08-21 17:36:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103837 to 99038. [2021-08-21 17:36:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 2.1115239758877995) internal successors, (209119), 99037 states have internal predecessors, (209119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 209119 transitions. [2021-08-21 17:36:54,673 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 209119 transitions. Word has length 22 [2021-08-21 17:36:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:54,673 INFO L470 AbstractCegarLoop]: Abstraction has 99038 states and 209119 transitions. [2021-08-21 17:36:54,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 209119 transitions. [2021-08-21 17:36:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:36:54,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:54,696 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:54,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:54,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:54,915 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:36:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:54,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1693346379, now seen corresponding path program 151 times [2021-08-21 17:36:54,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:54,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918941346] [2021-08-21 17:36:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:54,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:54,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918941346] [2021-08-21 17:36:54,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918941346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074639318] [2021-08-21 17:36:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:54,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:54,997 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:36:54,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 17:36:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:36:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:56,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074639318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:56,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:56,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:36:56,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142880434] [2021-08-21 17:36:56,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:56,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:56,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:56,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:56,339 INFO L87 Difference]: Start difference. First operand 99038 states and 209119 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:57,080 INFO L93 Difference]: Finished difference Result 121564 states and 255969 transitions. [2021-08-21 17:36:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:36:57,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:36:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:57,405 INFO L225 Difference]: With dead ends: 121564 [2021-08-21 17:36:57,406 INFO L226 Difference]: Without dead ends: 121564 [2021-08-21 17:36:57,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:36:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121564 states. [2021-08-21 17:37:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121564 to 118477. [2021-08-21 17:37:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118477 states, 118476 states have (on average 2.108578952699281) internal successors, (249816), 118476 states have internal predecessors, (249816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118477 states to 118477 states and 249816 transitions. [2021-08-21 17:37:01,106 INFO L78 Accepts]: Start accepts. Automaton has 118477 states and 249816 transitions. Word has length 22 [2021-08-21 17:37:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:01,106 INFO L470 AbstractCegarLoop]: Abstraction has 118477 states and 249816 transitions. [2021-08-21 17:37:01,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 118477 states and 249816 transitions. [2021-08-21 17:37:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:01,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:01,126 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:01,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:01,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:01,329 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1867499091, now seen corresponding path program 152 times [2021-08-21 17:37:01,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:01,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820925946] [2021-08-21 17:37:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:01,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:01,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:01,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820925946] [2021-08-21 17:37:01,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820925946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:01,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291098947] [2021-08-21 17:37:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:37:01,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:01,416 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:01,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 17:37:02,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:37:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:02,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291098947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:02,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:02,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:37:02,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310747724] [2021-08-21 17:37:02,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:02,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:02,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:02,737 INFO L87 Difference]: Start difference. First operand 118477 states and 249816 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:03,487 INFO L93 Difference]: Finished difference Result 148489 states and 309620 transitions. [2021-08-21 17:37:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:37:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:03,882 INFO L225 Difference]: With dead ends: 148489 [2021-08-21 17:37:03,882 INFO L226 Difference]: Without dead ends: 148489 [2021-08-21 17:37:03,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:37:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148489 states. [2021-08-21 17:37:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148489 to 66270. [2021-08-21 17:37:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66270 states, 66269 states have (on average 2.1063845840438216) internal successors, (139588), 66269 states have internal predecessors, (139588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66270 states to 66270 states and 139588 transitions. [2021-08-21 17:37:06,798 INFO L78 Accepts]: Start accepts. Automaton has 66270 states and 139588 transitions. Word has length 22 [2021-08-21 17:37:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:06,798 INFO L470 AbstractCegarLoop]: Abstraction has 66270 states and 139588 transitions. [2021-08-21 17:37:06,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 66270 states and 139588 transitions. [2021-08-21 17:37:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:06,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:06,822 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:06,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:07,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 17:37:07,037 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:07,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1424599951, now seen corresponding path program 153 times [2021-08-21 17:37:07,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:07,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977884271] [2021-08-21 17:37:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:07,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:07,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:07,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977884271] [2021-08-21 17:37:07,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977884271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:07,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443104422] [2021-08-21 17:37:07,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:37:07,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:07,135 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:07,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 17:37:08,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:37:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:08,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:08,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443104422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:08,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:08,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:37:08,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618100343] [2021-08-21 17:37:08,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:08,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:08,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:08,418 INFO L87 Difference]: Start difference. First operand 66270 states and 139588 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:09,011 INFO L93 Difference]: Finished difference Result 88658 states and 185538 transitions. [2021-08-21 17:37:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:37:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:09,226 INFO L225 Difference]: With dead ends: 88658 [2021-08-21 17:37:09,226 INFO L226 Difference]: Without dead ends: 88658 [2021-08-21 17:37:09,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:37:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88658 states. [2021-08-21 17:37:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88658 to 42568. [2021-08-21 17:37:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42568 states, 42567 states have (on average 2.118636502454953) internal successors, (90184), 42567 states have internal predecessors, (90184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42568 states to 42568 states and 90184 transitions. [2021-08-21 17:37:10,657 INFO L78 Accepts]: Start accepts. Automaton has 42568 states and 90184 transitions. Word has length 22 [2021-08-21 17:37:10,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:10,657 INFO L470 AbstractCegarLoop]: Abstraction has 42568 states and 90184 transitions. [2021-08-21 17:37:10,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 42568 states and 90184 transitions. [2021-08-21 17:37:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:10,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:10,669 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:10,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:10,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:10,888 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:10,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1422181647, now seen corresponding path program 154 times [2021-08-21 17:37:10,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:10,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606785059] [2021-08-21 17:37:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:10,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:10,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:10,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606785059] [2021-08-21 17:37:10,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606785059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:10,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509228319] [2021-08-21 17:37:10,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:37:10,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:10,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:10,968 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:10,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 17:37:12,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:37:12,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:12,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509228319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:12,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:12,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:37:12,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23168621] [2021-08-21 17:37:12,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:37:12,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:12,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:37:12,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:37:12,259 INFO L87 Difference]: Start difference. First operand 42568 states and 90184 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:12,567 INFO L93 Difference]: Finished difference Result 45314 states and 95488 transitions. [2021-08-21 17:37:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:37:12,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:12,644 INFO L225 Difference]: With dead ends: 45314 [2021-08-21 17:37:12,644 INFO L226 Difference]: Without dead ends: 45314 [2021-08-21 17:37:12,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:37:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45314 states. [2021-08-21 17:37:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45314 to 32714. [2021-08-21 17:37:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32714 states, 32713 states have (on average 2.1167731482896706) internal successors, (69246), 32713 states have internal predecessors, (69246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32714 states to 32714 states and 69246 transitions. [2021-08-21 17:37:13,364 INFO L78 Accepts]: Start accepts. Automaton has 32714 states and 69246 transitions. Word has length 22 [2021-08-21 17:37:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:13,364 INFO L470 AbstractCegarLoop]: Abstraction has 32714 states and 69246 transitions. [2021-08-21 17:37:13,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 32714 states and 69246 transitions. [2021-08-21 17:37:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:13,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:13,374 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:13,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:13,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 17:37:13,589 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash 349096267, now seen corresponding path program 155 times [2021-08-21 17:37:13,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:13,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618174772] [2021-08-21 17:37:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:13,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:13,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:13,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618174772] [2021-08-21 17:37:13,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618174772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:13,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842431749] [2021-08-21 17:37:13,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:37:13,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:13,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:13,672 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:13,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 17:37:14,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:37:14,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:14,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:14,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842431749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:14,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:14,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:37:14,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19796587] [2021-08-21 17:37:14,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:37:14,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:14,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:37:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:37:14,876 INFO L87 Difference]: Start difference. First operand 32714 states and 69246 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:15,094 INFO L93 Difference]: Finished difference Result 35009 states and 73974 transitions. [2021-08-21 17:37:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:37:15,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:15,171 INFO L225 Difference]: With dead ends: 35009 [2021-08-21 17:37:15,171 INFO L226 Difference]: Without dead ends: 35009 [2021-08-21 17:37:15,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:37:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35009 states. [2021-08-21 17:37:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35009 to 34928. [2021-08-21 17:37:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34928 states, 34927 states have (on average 2.114352792968191) internal successors, (73848), 34927 states have internal predecessors, (73848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34928 states to 34928 states and 73848 transitions. [2021-08-21 17:37:15,849 INFO L78 Accepts]: Start accepts. Automaton has 34928 states and 73848 transitions. Word has length 22 [2021-08-21 17:37:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:15,849 INFO L470 AbstractCegarLoop]: Abstraction has 34928 states and 73848 transitions. [2021-08-21 17:37:15,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34928 states and 73848 transitions. [2021-08-21 17:37:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:15,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:15,861 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:15,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:16,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 17:37:16,080 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1443187855, now seen corresponding path program 156 times [2021-08-21 17:37:16,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:16,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964950564] [2021-08-21 17:37:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:16,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:16,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:16,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964950564] [2021-08-21 17:37:16,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964950564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:16,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512096459] [2021-08-21 17:37:16,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:37:16,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:16,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:16,164 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:16,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 17:37:17,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:37:17,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:17,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512096459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:17,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:17,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:37:17,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282363861] [2021-08-21 17:37:17,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:17,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:17,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:17,325 INFO L87 Difference]: Start difference. First operand 34928 states and 73848 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:17,699 INFO L93 Difference]: Finished difference Result 35385 states and 74726 transitions. [2021-08-21 17:37:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:37:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:17,773 INFO L225 Difference]: With dead ends: 35385 [2021-08-21 17:37:17,773 INFO L226 Difference]: Without dead ends: 35385 [2021-08-21 17:37:17,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:37:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35385 states. [2021-08-21 17:37:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35385 to 33377. [2021-08-21 17:37:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33377 states, 33376 states have (on average 2.1158317353787153) internal successors, (70618), 33376 states have internal predecessors, (70618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33377 states to 33377 states and 70618 transitions. [2021-08-21 17:37:18,430 INFO L78 Accepts]: Start accepts. Automaton has 33377 states and 70618 transitions. Word has length 22 [2021-08-21 17:37:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:18,431 INFO L470 AbstractCegarLoop]: Abstraction has 33377 states and 70618 transitions. [2021-08-21 17:37:18,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 33377 states and 70618 transitions. [2021-08-21 17:37:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:18,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:18,441 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:18,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:18,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 17:37:18,660 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1000288715, now seen corresponding path program 157 times [2021-08-21 17:37:18,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:18,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571621264] [2021-08-21 17:37:18,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:18,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:18,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:18,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571621264] [2021-08-21 17:37:18,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571621264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:18,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102736045] [2021-08-21 17:37:18,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:37:18,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:18,746 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:18,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 17:37:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:19,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102736045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:19,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:19,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:37:19,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982191395] [2021-08-21 17:37:19,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:19,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:19,926 INFO L87 Difference]: Start difference. First operand 33377 states and 70618 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:20,215 INFO L93 Difference]: Finished difference Result 35609 states and 75183 transitions. [2021-08-21 17:37:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:37:20,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:20,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:20,286 INFO L225 Difference]: With dead ends: 35609 [2021-08-21 17:37:20,287 INFO L226 Difference]: Without dead ends: 35609 [2021-08-21 17:37:20,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=284, Invalid=586, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:37:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35609 states. [2021-08-21 17:37:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35609 to 34215. [2021-08-21 17:37:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34215 states, 34214 states have (on average 2.1148068042321855) internal successors, (72356), 34214 states have internal predecessors, (72356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34215 states to 34215 states and 72356 transitions. [2021-08-21 17:37:21,147 INFO L78 Accepts]: Start accepts. Automaton has 34215 states and 72356 transitions. Word has length 22 [2021-08-21 17:37:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:21,147 INFO L470 AbstractCegarLoop]: Abstraction has 34215 states and 72356 transitions. [2021-08-21 17:37:21,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34215 states and 72356 transitions. [2021-08-21 17:37:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:21,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:21,158 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:21,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:21,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:21,377 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 155317263, now seen corresponding path program 158 times [2021-08-21 17:37:21,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:21,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178509188] [2021-08-21 17:37:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:21,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:21,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:21,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178509188] [2021-08-21 17:37:21,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178509188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:21,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647731762] [2021-08-21 17:37:21,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:37:21,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:21,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:21,475 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:21,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 17:37:22,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:37:22,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:22,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:22,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:22,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647731762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:22,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:22,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:37:22,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450346946] [2021-08-21 17:37:22,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:22,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:22,746 INFO L87 Difference]: Start difference. First operand 34215 states and 72356 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:23,146 INFO L93 Difference]: Finished difference Result 35578 states and 75130 transitions. [2021-08-21 17:37:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:37:23,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:23,219 INFO L225 Difference]: With dead ends: 35578 [2021-08-21 17:37:23,219 INFO L226 Difference]: Without dead ends: 35578 [2021-08-21 17:37:23,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=524, Invalid=1036, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:37:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35578 states. [2021-08-21 17:37:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35578 to 33587. [2021-08-21 17:37:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33587 states, 33586 states have (on average 2.116953492526648) internal successors, (71100), 33586 states have internal predecessors, (71100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33587 states to 33587 states and 71100 transitions. [2021-08-21 17:37:23,930 INFO L78 Accepts]: Start accepts. Automaton has 33587 states and 71100 transitions. Word has length 22 [2021-08-21 17:37:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:23,930 INFO L470 AbstractCegarLoop]: Abstraction has 33587 states and 71100 transitions. [2021-08-21 17:37:23,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 33587 states and 71100 transitions. [2021-08-21 17:37:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:23,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:23,940 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:23,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:24,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:24,156 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2130120331, now seen corresponding path program 159 times [2021-08-21 17:37:24,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:24,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543331782] [2021-08-21 17:37:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:24,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:24,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:24,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543331782] [2021-08-21 17:37:24,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543331782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:24,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715895107] [2021-08-21 17:37:24,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:37:24,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:24,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:24,222 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 17:37:25,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:37:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:25,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:37:25,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715895107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:25,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:25,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 17:37:25,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210401665] [2021-08-21 17:37:25,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:37:25,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:37:25,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:37:25,371 INFO L87 Difference]: Start difference. First operand 33587 states and 71100 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:25,653 INFO L93 Difference]: Finished difference Result 33627 states and 71134 transitions. [2021-08-21 17:37:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:37:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 17:37:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:25,713 INFO L225 Difference]: With dead ends: 33627 [2021-08-21 17:37:25,713 INFO L226 Difference]: Without dead ends: 33625 [2021-08-21 17:37:25,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:37:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33625 states. [2021-08-21 17:37:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33625 to 33587. [2021-08-21 17:37:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33587 states, 33586 states have (on average 2.1169237182159235) internal successors, (71099), 33586 states have internal predecessors, (71099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33587 states to 33587 states and 71099 transitions. [2021-08-21 17:37:26,402 INFO L78 Accepts]: Start accepts. Automaton has 33587 states and 71099 transitions. Word has length 22 [2021-08-21 17:37:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:26,403 INFO L470 AbstractCegarLoop]: Abstraction has 33587 states and 71099 transitions. [2021-08-21 17:37:26,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33587 states and 71099 transitions. [2021-08-21 17:37:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:26,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:26,413 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:26,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:26,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:26,629 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1683395275, now seen corresponding path program 160 times [2021-08-21 17:37:26,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:26,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889498510] [2021-08-21 17:37:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:26,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:26,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:26,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889498510] [2021-08-21 17:37:26,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889498510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:26,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631384595] [2021-08-21 17:37:26,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:37:26,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:26,715 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:26,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 17:37:27,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:37:27,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:27,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631384595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:27,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:27,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:37:27,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900831165] [2021-08-21 17:37:27,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:37:27,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:37:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:37:27,916 INFO L87 Difference]: Start difference. First operand 33587 states and 71099 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:28,269 INFO L93 Difference]: Finished difference Result 36516 states and 76919 transitions. [2021-08-21 17:37:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:37:28,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:28,348 INFO L225 Difference]: With dead ends: 36516 [2021-08-21 17:37:28,348 INFO L226 Difference]: Without dead ends: 36516 [2021-08-21 17:37:28,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=415, Invalid=775, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:37:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36516 states. [2021-08-21 17:37:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36516 to 31494. [2021-08-21 17:37:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31494 states, 31493 states have (on average 2.118026228050678) internal successors, (66703), 31493 states have internal predecessors, (66703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31494 states to 31494 states and 66703 transitions. [2021-08-21 17:37:28,967 INFO L78 Accepts]: Start accepts. Automaton has 31494 states and 66703 transitions. Word has length 22 [2021-08-21 17:37:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:28,967 INFO L470 AbstractCegarLoop]: Abstraction has 31494 states and 66703 transitions. [2021-08-21 17:37:28,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 31494 states and 66703 transitions. [2021-08-21 17:37:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:28,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:28,977 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:28,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-21 17:37:29,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:29,196 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1259084039, now seen corresponding path program 161 times [2021-08-21 17:37:29,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:29,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049455513] [2021-08-21 17:37:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:29,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:29,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:29,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049455513] [2021-08-21 17:37:29,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049455513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:29,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407818388] [2021-08-21 17:37:29,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:37:29,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:29,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:29,282 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:29,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 17:37:30,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:37:30,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:30,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:30,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:30,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407818388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:30,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:37:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407675903] [2021-08-21 17:37:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:37:30,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:37:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:37:30,573 INFO L87 Difference]: Start difference. First operand 31494 states and 66703 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:30,851 INFO L93 Difference]: Finished difference Result 31885 states and 67456 transitions. [2021-08-21 17:37:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:37:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:30,926 INFO L225 Difference]: With dead ends: 31885 [2021-08-21 17:37:30,926 INFO L226 Difference]: Without dead ends: 31885 [2021-08-21 17:37:30,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:37:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31885 states. [2021-08-21 17:37:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31885 to 30743. [2021-08-21 17:37:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30743 states, 30742 states have (on average 2.1187300761173637) internal successors, (65134), 30742 states have internal predecessors, (65134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30743 states to 30743 states and 65134 transitions. [2021-08-21 17:37:31,539 INFO L78 Accepts]: Start accepts. Automaton has 30743 states and 65134 transitions. Word has length 22 [2021-08-21 17:37:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:31,540 INFO L470 AbstractCegarLoop]: Abstraction has 30743 states and 65134 transitions. [2021-08-21 17:37:31,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30743 states and 65134 transitions. [2021-08-21 17:37:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:31,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:31,549 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:31,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-21 17:37:31,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:31,758 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:31,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash 414112587, now seen corresponding path program 162 times [2021-08-21 17:37:31,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:31,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283010628] [2021-08-21 17:37:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:31,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:31,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:31,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283010628] [2021-08-21 17:37:31,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283010628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:31,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162860658] [2021-08-21 17:37:31,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:37:31,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:31,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:31,845 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:31,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 17:37:33,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:37:33,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:33,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:33,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162860658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:33,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:33,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:37:33,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223657337] [2021-08-21 17:37:33,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:37:33,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:37:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:37:33,118 INFO L87 Difference]: Start difference. First operand 30743 states and 65134 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:33,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:33,470 INFO L93 Difference]: Finished difference Result 32202 states and 68127 transitions. [2021-08-21 17:37:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:37:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:33,532 INFO L225 Difference]: With dead ends: 32202 [2021-08-21 17:37:33,532 INFO L226 Difference]: Without dead ends: 32202 [2021-08-21 17:37:33,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:37:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32202 states. [2021-08-21 17:37:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32202 to 30313. [2021-08-21 17:37:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30313 states, 30312 states have (on average 2.120315386645553) internal successors, (64271), 30312 states have internal predecessors, (64271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30313 states to 30313 states and 64271 transitions. [2021-08-21 17:37:34,098 INFO L78 Accepts]: Start accepts. Automaton has 30313 states and 64271 transitions. Word has length 22 [2021-08-21 17:37:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:34,098 INFO L470 AbstractCegarLoop]: Abstraction has 30313 states and 64271 transitions. [2021-08-21 17:37:34,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30313 states and 64271 transitions. [2021-08-21 17:37:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:34,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:34,106 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:34,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:34,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:34,308 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:34,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:34,308 INFO L82 PathProgramCache]: Analyzing trace with hash -69444055, now seen corresponding path program 163 times [2021-08-21 17:37:34,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:34,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739867934] [2021-08-21 17:37:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:34,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:34,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:34,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739867934] [2021-08-21 17:37:34,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739867934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:34,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439400371] [2021-08-21 17:37:34,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:37:34,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:34,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:34,407 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:34,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 17:37:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:35,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439400371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:35,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:35,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:37:35,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566659960] [2021-08-21 17:37:35,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:37:35,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:37:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:37:35,642 INFO L87 Difference]: Start difference. First operand 30313 states and 64271 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:35,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:35,817 INFO L93 Difference]: Finished difference Result 30410 states and 64406 transitions. [2021-08-21 17:37:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:37:35,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:35,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:35,867 INFO L225 Difference]: With dead ends: 30410 [2021-08-21 17:37:35,867 INFO L226 Difference]: Without dead ends: 30408 [2021-08-21 17:37:35,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:37:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30408 states. [2021-08-21 17:37:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30408 to 30348. [2021-08-21 17:37:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30348 states, 30347 states have (on average 2.1198141496688305) internal successors, (64330), 30347 states have internal predecessors, (64330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30348 states to 30348 states and 64330 transitions. [2021-08-21 17:37:36,508 INFO L78 Accepts]: Start accepts. Automaton has 30348 states and 64330 transitions. Word has length 22 [2021-08-21 17:37:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:36,508 INFO L470 AbstractCegarLoop]: Abstraction has 30348 states and 64330 transitions. [2021-08-21 17:37:36,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 30348 states and 64330 transitions. [2021-08-21 17:37:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:36,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:36,516 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:36,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:36,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 17:37:36,733 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1787787761, now seen corresponding path program 164 times [2021-08-21 17:37:36,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:36,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860648395] [2021-08-21 17:37:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:36,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:36,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:36,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860648395] [2021-08-21 17:37:36,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860648395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:36,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076425792] [2021-08-21 17:37:36,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:37:36,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:36,811 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:36,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 17:37:38,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:37:38,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:38,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:38,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076425792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:38,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:38,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:37:38,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346328877] [2021-08-21 17:37:38,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:37:38,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:37:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:37:38,181 INFO L87 Difference]: Start difference. First operand 30348 states and 64330 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:38,336 INFO L93 Difference]: Finished difference Result 30877 states and 65313 transitions. [2021-08-21 17:37:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:37:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:38,390 INFO L225 Difference]: With dead ends: 30877 [2021-08-21 17:37:38,391 INFO L226 Difference]: Without dead ends: 30877 [2021-08-21 17:37:38,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:37:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30877 states. [2021-08-21 17:37:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30877 to 30363. [2021-08-21 17:37:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30363 states, 30362 states have (on average 2.1197220209472367) internal successors, (64359), 30362 states have internal predecessors, (64359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30363 states to 30363 states and 64359 transitions. [2021-08-21 17:37:39,027 INFO L78 Accepts]: Start accepts. Automaton has 30363 states and 64359 transitions. Word has length 22 [2021-08-21 17:37:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:39,028 INFO L470 AbstractCegarLoop]: Abstraction has 30363 states and 64359 transitions. [2021-08-21 17:37:39,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 30363 states and 64359 transitions. [2021-08-21 17:37:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:39,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:39,036 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:39,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:39,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 17:37:39,255 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash -77174453, now seen corresponding path program 165 times [2021-08-21 17:37:39,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:39,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975731450] [2021-08-21 17:37:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:39,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:39,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:39,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975731450] [2021-08-21 17:37:39,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975731450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:39,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777451777] [2021-08-21 17:37:39,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:37:39,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:39,326 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:39,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 17:37:40,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:37:40,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:40,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777451777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:40,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:40,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:37:40,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162434532] [2021-08-21 17:37:40,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:37:40,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:40,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:37:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:37:40,700 INFO L87 Difference]: Start difference. First operand 30363 states and 64359 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:40,928 INFO L93 Difference]: Finished difference Result 31175 states and 65905 transitions. [2021-08-21 17:37:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:37:40,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:41,001 INFO L225 Difference]: With dead ends: 31175 [2021-08-21 17:37:41,001 INFO L226 Difference]: Without dead ends: 31175 [2021-08-21 17:37:41,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:37:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31175 states. [2021-08-21 17:37:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31175 to 30389. [2021-08-21 17:37:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30389 states, 30388 states have (on average 2.119487955772015) internal successors, (64407), 30388 states have internal predecessors, (64407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30389 states to 30389 states and 64407 transitions. [2021-08-21 17:37:41,655 INFO L78 Accepts]: Start accepts. Automaton has 30389 states and 64407 transitions. Word has length 22 [2021-08-21 17:37:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:41,655 INFO L470 AbstractCegarLoop]: Abstraction has 30389 states and 64407 transitions. [2021-08-21 17:37:41,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 30389 states and 64407 transitions. [2021-08-21 17:37:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:41,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:41,663 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:41,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:41,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 17:37:41,882 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1412230543, now seen corresponding path program 166 times [2021-08-21 17:37:41,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:41,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419780019] [2021-08-21 17:37:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:41,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:41,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:41,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419780019] [2021-08-21 17:37:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419780019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:41,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838671768] [2021-08-21 17:37:41,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:37:41,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:41,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:41,972 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:41,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 17:37:43,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:37:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:43,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:43,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:43,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838671768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:43,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:43,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:37:43,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141747414] [2021-08-21 17:37:43,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:43,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:43,337 INFO L87 Difference]: Start difference. First operand 30389 states and 64407 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:43,665 INFO L93 Difference]: Finished difference Result 31238 states and 66033 transitions. [2021-08-21 17:37:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:37:43,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:43,733 INFO L225 Difference]: With dead ends: 31238 [2021-08-21 17:37:43,733 INFO L226 Difference]: Without dead ends: 31238 [2021-08-21 17:37:43,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:37:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31238 states. [2021-08-21 17:37:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31238 to 30435. [2021-08-21 17:37:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30435 states, 30434 states have (on average 2.1191430636787802) internal successors, (64494), 30434 states have internal predecessors, (64494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30435 states to 30435 states and 64494 transitions. [2021-08-21 17:37:44,270 INFO L78 Accepts]: Start accepts. Automaton has 30435 states and 64494 transitions. Word has length 22 [2021-08-21 17:37:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:44,271 INFO L470 AbstractCegarLoop]: Abstraction has 30435 states and 64494 transitions. [2021-08-21 17:37:44,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30435 states and 64494 transitions. [2021-08-21 17:37:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:44,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:44,279 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:44,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:44,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 17:37:44,497 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 339145163, now seen corresponding path program 167 times [2021-08-21 17:37:44,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:44,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094209427] [2021-08-21 17:37:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:44,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:44,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:44,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094209427] [2021-08-21 17:37:44,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094209427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:44,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271651701] [2021-08-21 17:37:44,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:37:44,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:44,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:44,585 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:44,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 17:37:45,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:37:45,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:45,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271651701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:45,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:37:45,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631454463] [2021-08-21 17:37:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:45,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:45,820 INFO L87 Difference]: Start difference. First operand 30435 states and 64494 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:46,027 INFO L93 Difference]: Finished difference Result 35277 states and 74546 transitions. [2021-08-21 17:37:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:37:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:46,091 INFO L225 Difference]: With dead ends: 35277 [2021-08-21 17:37:46,091 INFO L226 Difference]: Without dead ends: 35277 [2021-08-21 17:37:46,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:37:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35277 states. [2021-08-21 17:37:46,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35277 to 34778. [2021-08-21 17:37:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34778 states, 34777 states have (on average 2.116254996118124) internal successors, (73597), 34777 states have internal predecessors, (73597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34778 states to 34778 states and 73597 transitions. [2021-08-21 17:37:46,744 INFO L78 Accepts]: Start accepts. Automaton has 34778 states and 73597 transitions. Word has length 22 [2021-08-21 17:37:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:46,744 INFO L470 AbstractCegarLoop]: Abstraction has 34778 states and 73597 transitions. [2021-08-21 17:37:46,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 34778 states and 73597 transitions. [2021-08-21 17:37:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:46,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:46,754 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:46,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-21 17:37:46,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:46,973 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1433236751, now seen corresponding path program 168 times [2021-08-21 17:37:46,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:46,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923584729] [2021-08-21 17:37:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:46,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:47,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:47,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923584729] [2021-08-21 17:37:47,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923584729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:47,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102861617] [2021-08-21 17:37:47,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:37:47,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:47,052 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:47,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 17:37:48,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:37:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:48,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:48,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102861617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:48,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:48,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:37:48,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646511000] [2021-08-21 17:37:48,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:37:48,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:48,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:37:48,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:37:48,373 INFO L87 Difference]: Start difference. First operand 34778 states and 73597 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:48,546 INFO L93 Difference]: Finished difference Result 38561 states and 81307 transitions. [2021-08-21 17:37:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:37:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:48,613 INFO L225 Difference]: With dead ends: 38561 [2021-08-21 17:37:48,613 INFO L226 Difference]: Without dead ends: 38561 [2021-08-21 17:37:48,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:37:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38561 states. [2021-08-21 17:37:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38561 to 38354. [2021-08-21 17:37:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 2.1097176231324797) internal successors, (80914), 38353 states have internal predecessors, (80914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 80914 transitions. [2021-08-21 17:37:49,329 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 80914 transitions. Word has length 22 [2021-08-21 17:37:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:49,329 INFO L470 AbstractCegarLoop]: Abstraction has 38354 states and 80914 transitions. [2021-08-21 17:37:49,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 80914 transitions. [2021-08-21 17:37:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:49,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:49,341 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:49,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:49,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:49,562 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:49,562 INFO L82 PathProgramCache]: Analyzing trace with hash 990337611, now seen corresponding path program 169 times [2021-08-21 17:37:49,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:49,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908085784] [2021-08-21 17:37:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:49,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:49,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:49,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908085784] [2021-08-21 17:37:49,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908085784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:49,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172424984] [2021-08-21 17:37:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:37:49,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:49,650 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:49,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 17:37:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172424984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:50,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:50,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:37:50,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307838330] [2021-08-21 17:37:50,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:37:50,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:37:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:37:50,938 INFO L87 Difference]: Start difference. First operand 38354 states and 80914 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:51,197 INFO L93 Difference]: Finished difference Result 38641 states and 81467 transitions. [2021-08-21 17:37:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:37:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:51,279 INFO L225 Difference]: With dead ends: 38641 [2021-08-21 17:37:51,279 INFO L226 Difference]: Without dead ends: 38641 [2021-08-21 17:37:51,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:37:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38641 states. [2021-08-21 17:37:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38641 to 38358. [2021-08-21 17:37:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38358 states, 38357 states have (on average 2.109706181401048) internal successors, (80922), 38357 states have internal predecessors, (80922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38358 states to 38358 states and 80922 transitions. [2021-08-21 17:37:51,985 INFO L78 Accepts]: Start accepts. Automaton has 38358 states and 80922 transitions. Word has length 22 [2021-08-21 17:37:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:51,985 INFO L470 AbstractCegarLoop]: Abstraction has 38358 states and 80922 transitions. [2021-08-21 17:37:51,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 38358 states and 80922 transitions. [2021-08-21 17:37:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:51,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:51,999 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:52,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:52,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:52,213 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:52,213 INFO L82 PathProgramCache]: Analyzing trace with hash 145366159, now seen corresponding path program 170 times [2021-08-21 17:37:52,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:52,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222346823] [2021-08-21 17:37:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:52,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:52,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:52,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222346823] [2021-08-21 17:37:52,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222346823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:52,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134039775] [2021-08-21 17:37:52,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:37:52,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:52,313 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:52,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 17:37:53,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:37:53,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:53,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134039775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:53,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:53,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:37:53,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819188098] [2021-08-21 17:37:53,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:37:53,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:37:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:37:53,660 INFO L87 Difference]: Start difference. First operand 38358 states and 80922 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:54,191 INFO L93 Difference]: Finished difference Result 39877 states and 83988 transitions. [2021-08-21 17:37:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:37:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:54,272 INFO L225 Difference]: With dead ends: 39877 [2021-08-21 17:37:54,273 INFO L226 Difference]: Without dead ends: 39877 [2021-08-21 17:37:54,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:37:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39877 states. [2021-08-21 17:37:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39877 to 39659. [2021-08-21 17:37:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39659 states, 39658 states have (on average 2.107166271622371) internal successors, (83566), 39658 states have internal predecessors, (83566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39659 states to 39659 states and 83566 transitions. [2021-08-21 17:37:55,061 INFO L78 Accepts]: Start accepts. Automaton has 39659 states and 83566 transitions. Word has length 22 [2021-08-21 17:37:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:55,061 INFO L470 AbstractCegarLoop]: Abstraction has 39659 states and 83566 transitions. [2021-08-21 17:37:55,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 39659 states and 83566 transitions. [2021-08-21 17:37:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:55,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:55,072 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:55,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-08-21 17:37:55,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:55,291 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash -278945077, now seen corresponding path program 171 times [2021-08-21 17:37:55,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:55,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460323573] [2021-08-21 17:37:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:55,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:55,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:55,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460323573] [2021-08-21 17:37:55,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460323573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:55,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560716841] [2021-08-21 17:37:55,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:37:55,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:55,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:55,388 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:55,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 17:37:56,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:37:56,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:56,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:56,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:56,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560716841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:56,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:56,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:37:56,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025231745] [2021-08-21 17:37:56,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:37:56,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:56,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:37:56,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:37:56,812 INFO L87 Difference]: Start difference. First operand 39659 states and 83566 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:37:57,382 INFO L93 Difference]: Finished difference Result 41430 states and 87131 transitions. [2021-08-21 17:37:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:37:57,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:37:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:37:57,446 INFO L225 Difference]: With dead ends: 41430 [2021-08-21 17:37:57,446 INFO L226 Difference]: Without dead ends: 41430 [2021-08-21 17:37:57,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:37:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41430 states. [2021-08-21 17:37:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41430 to 40873. [2021-08-21 17:37:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40873 states, 40872 states have (on average 2.104717165785868) internal successors, (86024), 40872 states have internal predecessors, (86024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40873 states to 40873 states and 86024 transitions. [2021-08-21 17:37:58,088 INFO L78 Accepts]: Start accepts. Automaton has 40873 states and 86024 transitions. Word has length 22 [2021-08-21 17:37:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:37:58,088 INFO L470 AbstractCegarLoop]: Abstraction has 40873 states and 86024 transitions. [2021-08-21 17:37:58,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:37:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 40873 states and 86024 transitions. [2021-08-21 17:37:58,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:37:58,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:37:58,099 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:37:58,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-21 17:37:58,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:58,318 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:37:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:37:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2106945649, now seen corresponding path program 172 times [2021-08-21 17:37:58,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:37:58,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622513049] [2021-08-21 17:37:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:37:58,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:37:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:37:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:37:58,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:37:58,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622513049] [2021-08-21 17:37:58,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622513049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:58,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847998537] [2021-08-21 17:37:58,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:37:58,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:37:58,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:37:58,408 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:37:58,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 17:37:59,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:37:59,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:37:59,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:37:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:37:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:37:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847998537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:37:59,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:37:59,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:37:59,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473046222] [2021-08-21 17:37:59,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:37:59,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:37:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:37:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:37:59,831 INFO L87 Difference]: Start difference. First operand 40873 states and 86024 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:00,191 INFO L93 Difference]: Finished difference Result 41033 states and 86282 transitions. [2021-08-21 17:38:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:38:00,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:38:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:00,255 INFO L225 Difference]: With dead ends: 41033 [2021-08-21 17:38:00,255 INFO L226 Difference]: Without dead ends: 41030 [2021-08-21 17:38:00,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:38:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41030 states. [2021-08-21 17:38:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41030 to 40407. [2021-08-21 17:38:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40407 states, 40406 states have (on average 2.1035489778745733) internal successors, (84996), 40406 states have internal predecessors, (84996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40407 states to 40407 states and 84996 transitions. [2021-08-21 17:38:00,955 INFO L78 Accepts]: Start accepts. Automaton has 40407 states and 84996 transitions. Word has length 22 [2021-08-21 17:38:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:00,955 INFO L470 AbstractCegarLoop]: Abstraction has 40407 states and 84996 transitions. [2021-08-21 17:38:00,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 40407 states and 84996 transitions. [2021-08-21 17:38:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:00,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:00,968 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:00,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:01,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:01,187 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash 858902355, now seen corresponding path program 173 times [2021-08-21 17:38:01,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:01,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331489019] [2021-08-21 17:38:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:01,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:01,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:01,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331489019] [2021-08-21 17:38:01,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331489019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:01,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516614362] [2021-08-21 17:38:01,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:38:01,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:01,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:01,264 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:01,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 17:38:02,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:38:02,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:02,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516614362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:02,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:02,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:38:02,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165731565] [2021-08-21 17:38:02,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:38:02,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:38:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:38:02,626 INFO L87 Difference]: Start difference. First operand 40407 states and 84996 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:02,883 INFO L93 Difference]: Finished difference Result 46012 states and 96277 transitions. [2021-08-21 17:38:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:38:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:02,975 INFO L225 Difference]: With dead ends: 46012 [2021-08-21 17:38:02,975 INFO L226 Difference]: Without dead ends: 46012 [2021-08-21 17:38:02,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:38:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46012 states. [2021-08-21 17:38:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46012 to 45355. [2021-08-21 17:38:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45355 states, 45354 states have (on average 2.0944348899766285) internal successors, (94991), 45354 states have internal predecessors, (94991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45355 states to 45355 states and 94991 transitions. [2021-08-21 17:38:03,914 INFO L78 Accepts]: Start accepts. Automaton has 45355 states and 94991 transitions. Word has length 22 [2021-08-21 17:38:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:03,914 INFO L470 AbstractCegarLoop]: Abstraction has 45355 states and 94991 transitions. [2021-08-21 17:38:03,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45355 states and 94991 transitions. [2021-08-21 17:38:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:03,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:03,929 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:03,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:04,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-21 17:38:04,146 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1952993943, now seen corresponding path program 174 times [2021-08-21 17:38:04,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:04,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756945775] [2021-08-21 17:38:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:04,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:04,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:04,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756945775] [2021-08-21 17:38:04,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756945775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:04,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351837943] [2021-08-21 17:38:04,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:38:04,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:04,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:04,397 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:04,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 17:38:05,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:38:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:05,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351837943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:05,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:05,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:38:05,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737811618] [2021-08-21 17:38:05,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:38:05,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:38:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:38:05,738 INFO L87 Difference]: Start difference. First operand 45355 states and 94991 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:06,006 INFO L93 Difference]: Finished difference Result 48664 states and 101567 transitions. [2021-08-21 17:38:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:38:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:06,121 INFO L225 Difference]: With dead ends: 48664 [2021-08-21 17:38:06,122 INFO L226 Difference]: Without dead ends: 48664 [2021-08-21 17:38:06,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:38:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48664 states. [2021-08-21 17:38:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48664 to 45582. [2021-08-21 17:38:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45582 states, 45581 states have (on average 2.093657444988043) internal successors, (95431), 45581 states have internal predecessors, (95431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45582 states to 45582 states and 95431 transitions. [2021-08-21 17:38:07,319 INFO L78 Accepts]: Start accepts. Automaton has 45582 states and 95431 transitions. Word has length 22 [2021-08-21 17:38:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:07,319 INFO L470 AbstractCegarLoop]: Abstraction has 45582 states and 95431 transitions. [2021-08-21 17:38:07,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 45582 states and 95431 transitions. [2021-08-21 17:38:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:07,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:07,333 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:07,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:07,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 17:38:07,553 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:07,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1510094803, now seen corresponding path program 175 times [2021-08-21 17:38:07,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:07,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759508044] [2021-08-21 17:38:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:07,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:07,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:07,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759508044] [2021-08-21 17:38:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759508044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:07,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313490731] [2021-08-21 17:38:07,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:38:07,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:07,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:07,646 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:07,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 17:38:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:08,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:08,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313490731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:08,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:08,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:38:08,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989297181] [2021-08-21 17:38:08,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:38:08,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:38:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:38:08,990 INFO L87 Difference]: Start difference. First operand 45582 states and 95431 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:09,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:09,314 INFO L93 Difference]: Finished difference Result 54367 states and 113289 transitions. [2021-08-21 17:38:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:38:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:09,454 INFO L225 Difference]: With dead ends: 54367 [2021-08-21 17:38:09,454 INFO L226 Difference]: Without dead ends: 54367 [2021-08-21 17:38:09,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:38:09,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54367 states. [2021-08-21 17:38:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54367 to 51935. [2021-08-21 17:38:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51935 states, 51934 states have (on average 2.0880155582084954) internal successors, (108439), 51934 states have internal predecessors, (108439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51935 states to 51935 states and 108439 transitions. [2021-08-21 17:38:10,769 INFO L78 Accepts]: Start accepts. Automaton has 51935 states and 108439 transitions. Word has length 22 [2021-08-21 17:38:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:10,769 INFO L470 AbstractCegarLoop]: Abstraction has 51935 states and 108439 transitions. [2021-08-21 17:38:10,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 51935 states and 108439 transitions. [2021-08-21 17:38:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:10,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:10,787 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:10,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-21 17:38:11,006 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash 665123351, now seen corresponding path program 176 times [2021-08-21 17:38:11,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:11,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223898578] [2021-08-21 17:38:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:11,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:11,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:11,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223898578] [2021-08-21 17:38:11,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223898578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:11,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598468928] [2021-08-21 17:38:11,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:38:11,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:11,405 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:11,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 17:38:12,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:38:12,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:12,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598468928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:12,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:12,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:38:12,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862515738] [2021-08-21 17:38:12,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:38:12,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:38:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:38:12,855 INFO L87 Difference]: Start difference. First operand 51935 states and 108439 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:13,280 INFO L93 Difference]: Finished difference Result 67195 states and 139287 transitions. [2021-08-21 17:38:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:38:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:13,446 INFO L225 Difference]: With dead ends: 67195 [2021-08-21 17:38:13,446 INFO L226 Difference]: Without dead ends: 67195 [2021-08-21 17:38:13,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:38:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67195 states. [2021-08-21 17:38:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67195 to 62840. [2021-08-21 17:38:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62840 states, 62839 states have (on average 2.078183930361718) internal successors, (130591), 62839 states have internal predecessors, (130591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62840 states to 62840 states and 130591 transitions. [2021-08-21 17:38:14,991 INFO L78 Accepts]: Start accepts. Automaton has 62840 states and 130591 transitions. Word has length 22 [2021-08-21 17:38:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:14,991 INFO L470 AbstractCegarLoop]: Abstraction has 62840 states and 130591 transitions. [2021-08-21 17:38:14,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 62840 states and 130591 transitions. [2021-08-21 17:38:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:15,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:15,007 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:15,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:15,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:15,226 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:15,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1768890127, now seen corresponding path program 177 times [2021-08-21 17:38:15,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:15,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060393641] [2021-08-21 17:38:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:15,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:15,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:15,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060393641] [2021-08-21 17:38:15,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060393641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:15,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280390281] [2021-08-21 17:38:15,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:38:15,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:15,335 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:15,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 17:38:16,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:38:16,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:16,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:16,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:16,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280390281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:16,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:16,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:16,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634650853] [2021-08-21 17:38:16,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:16,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:16,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:16,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:16,909 INFO L87 Difference]: Start difference. First operand 62840 states and 130591 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:17,469 INFO L93 Difference]: Finished difference Result 74861 states and 154578 transitions. [2021-08-21 17:38:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:38:17,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:17,657 INFO L225 Difference]: With dead ends: 74861 [2021-08-21 17:38:17,657 INFO L226 Difference]: Without dead ends: 74861 [2021-08-21 17:38:17,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:38:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74861 states. [2021-08-21 17:38:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74861 to 52880. [2021-08-21 17:38:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52880 states, 52879 states have (on average 2.083908545925604) internal successors, (110195), 52879 states have internal predecessors, (110195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52880 states to 52880 states and 110195 transitions. [2021-08-21 17:38:19,049 INFO L78 Accepts]: Start accepts. Automaton has 52880 states and 110195 transitions. Word has length 22 [2021-08-21 17:38:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:19,050 INFO L470 AbstractCegarLoop]: Abstraction has 52880 states and 110195 transitions. [2021-08-21 17:38:19,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 52880 states and 110195 transitions. [2021-08-21 17:38:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:19,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:19,066 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:19,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:19,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:19,277 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 923918675, now seen corresponding path program 178 times [2021-08-21 17:38:19,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:19,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501504400] [2021-08-21 17:38:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:19,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:19,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:19,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501504400] [2021-08-21 17:38:19,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501504400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:19,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610277148] [2021-08-21 17:38:19,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:38:19,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:19,374 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:19,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 17:38:20,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:38:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:20,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610277148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:20,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:20,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:20,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001664505] [2021-08-21 17:38:20,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:20,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:20,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:20,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:20,969 INFO L87 Difference]: Start difference. First operand 52880 states and 110195 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:21,559 INFO L93 Difference]: Finished difference Result 68200 states and 141179 transitions. [2021-08-21 17:38:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:38:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:21,710 INFO L225 Difference]: With dead ends: 68200 [2021-08-21 17:38:21,711 INFO L226 Difference]: Without dead ends: 68200 [2021-08-21 17:38:21,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=560, Invalid=1080, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:38:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68200 states. [2021-08-21 17:38:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68200 to 46159. [2021-08-21 17:38:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46159 states, 46158 states have (on average 2.0953030893886218) internal successors, (96715), 46158 states have internal predecessors, (96715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46159 states to 46159 states and 96715 transitions. [2021-08-21 17:38:22,936 INFO L78 Accepts]: Start accepts. Automaton has 46159 states and 96715 transitions. Word has length 22 [2021-08-21 17:38:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:22,936 INFO L470 AbstractCegarLoop]: Abstraction has 46159 states and 96715 transitions. [2021-08-21 17:38:22,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 46159 states and 96715 transitions. [2021-08-21 17:38:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:22,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:22,951 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:22,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-21 17:38:23,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:23,171 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash 848951251, now seen corresponding path program 179 times [2021-08-21 17:38:23,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:23,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340980365] [2021-08-21 17:38:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:23,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:23,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:23,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340980365] [2021-08-21 17:38:23,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340980365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:23,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391445164] [2021-08-21 17:38:23,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:38:23,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:23,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:23,248 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:23,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 17:38:24,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:38:24,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:24,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:24,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:24,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391445164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:24,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:24,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:38:24,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278796631] [2021-08-21 17:38:24,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:38:24,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:24,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:38:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:38:24,808 INFO L87 Difference]: Start difference. First operand 46159 states and 96715 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:25,240 INFO L93 Difference]: Finished difference Result 48768 states and 101830 transitions. [2021-08-21 17:38:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:38:25,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:25,343 INFO L225 Difference]: With dead ends: 48768 [2021-08-21 17:38:25,343 INFO L226 Difference]: Without dead ends: 48768 [2021-08-21 17:38:25,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:38:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48768 states. [2021-08-21 17:38:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48768 to 36007. [2021-08-21 17:38:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36007 states, 36006 states have (on average 2.1053991001499752) internal successors, (75807), 36006 states have internal predecessors, (75807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36007 states to 36007 states and 75807 transitions. [2021-08-21 17:38:26,125 INFO L78 Accepts]: Start accepts. Automaton has 36007 states and 75807 transitions. Word has length 22 [2021-08-21 17:38:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:26,125 INFO L470 AbstractCegarLoop]: Abstraction has 36007 states and 75807 transitions. [2021-08-21 17:38:26,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 36007 states and 75807 transitions. [2021-08-21 17:38:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:26,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:26,135 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:26,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-21 17:38:26,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:26,337 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1943042839, now seen corresponding path program 180 times [2021-08-21 17:38:26,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:26,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939972728] [2021-08-21 17:38:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:26,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:26,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:26,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939972728] [2021-08-21 17:38:26,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939972728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:26,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507407130] [2021-08-21 17:38:26,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:38:26,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:26,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:26,420 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:26,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 17:38:27,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:38:27,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:27,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:27,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507407130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:27,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:27,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:38:27,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192430914] [2021-08-21 17:38:27,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:38:27,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:38:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:38:27,876 INFO L87 Difference]: Start difference. First operand 36007 states and 75807 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:28,037 INFO L93 Difference]: Finished difference Result 37936 states and 79697 transitions. [2021-08-21 17:38:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:38:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:28,101 INFO L225 Difference]: With dead ends: 37936 [2021-08-21 17:38:28,101 INFO L226 Difference]: Without dead ends: 37936 [2021-08-21 17:38:28,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:38:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37936 states. [2021-08-21 17:38:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37936 to 37688. [2021-08-21 17:38:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37688 states, 37687 states have (on average 2.1021041738530526) internal successors, (79222), 37687 states have internal predecessors, (79222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37688 states to 37688 states and 79222 transitions. [2021-08-21 17:38:28,707 INFO L78 Accepts]: Start accepts. Automaton has 37688 states and 79222 transitions. Word has length 22 [2021-08-21 17:38:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:28,707 INFO L470 AbstractCegarLoop]: Abstraction has 37688 states and 79222 transitions. [2021-08-21 17:38:28,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 37688 states and 79222 transitions. [2021-08-21 17:38:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:28,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:28,717 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:28,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:28,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 17:38:28,937 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1500143699, now seen corresponding path program 181 times [2021-08-21 17:38:28,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:28,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173029127] [2021-08-21 17:38:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:28,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:29,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:29,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173029127] [2021-08-21 17:38:29,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173029127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:29,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998627699] [2021-08-21 17:38:29,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:38:29,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:29,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:29,019 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:29,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 17:38:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:30,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998627699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:30,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:30,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:30,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443764542] [2021-08-21 17:38:30,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:30,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:30,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:30,513 INFO L87 Difference]: Start difference. First operand 37688 states and 79222 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:30,738 INFO L93 Difference]: Finished difference Result 38237 states and 80299 transitions. [2021-08-21 17:38:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:38:30,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:30,802 INFO L225 Difference]: With dead ends: 38237 [2021-08-21 17:38:30,802 INFO L226 Difference]: Without dead ends: 38237 [2021-08-21 17:38:30,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:38:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38237 states. [2021-08-21 17:38:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38237 to 36808. [2021-08-21 17:38:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36808 states, 36807 states have (on average 2.10378460618904) internal successors, (77434), 36807 states have internal predecessors, (77434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36808 states to 36808 states and 77434 transitions. [2021-08-21 17:38:31,433 INFO L78 Accepts]: Start accepts. Automaton has 36808 states and 77434 transitions. Word has length 22 [2021-08-21 17:38:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:31,433 INFO L470 AbstractCegarLoop]: Abstraction has 36808 states and 77434 transitions. [2021-08-21 17:38:31,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 36808 states and 77434 transitions. [2021-08-21 17:38:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:31,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:31,443 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:31,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:31,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:31,662 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash 655172247, now seen corresponding path program 182 times [2021-08-21 17:38:31,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:31,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806718052] [2021-08-21 17:38:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:31,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:31,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806718052] [2021-08-21 17:38:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806718052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:31,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731257291] [2021-08-21 17:38:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:38:31,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:31,748 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:31,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 17:38:33,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:38:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:33,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731257291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:33,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:33,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:33,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328650883] [2021-08-21 17:38:33,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:33,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:33,224 INFO L87 Difference]: Start difference. First operand 36808 states and 77434 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:33,517 INFO L93 Difference]: Finished difference Result 38358 states and 80537 transitions. [2021-08-21 17:38:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:38:33,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:33,585 INFO L225 Difference]: With dead ends: 38358 [2021-08-21 17:38:33,585 INFO L226 Difference]: Without dead ends: 38358 [2021-08-21 17:38:33,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:38:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38358 states. [2021-08-21 17:38:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38358 to 37210. [2021-08-21 17:38:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37210 states, 37209 states have (on average 2.102878335886479) internal successors, (78246), 37209 states have internal predecessors, (78246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37210 states to 37210 states and 78246 transitions. [2021-08-21 17:38:34,288 INFO L78 Accepts]: Start accepts. Automaton has 37210 states and 78246 transitions. Word has length 22 [2021-08-21 17:38:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:34,288 INFO L470 AbstractCegarLoop]: Abstraction has 37210 states and 78246 transitions. [2021-08-21 17:38:34,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 37210 states and 78246 transitions. [2021-08-21 17:38:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:34,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:34,383 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:34,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:34,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:34,583 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:34,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:34,583 INFO L82 PathProgramCache]: Analyzing trace with hash 230861011, now seen corresponding path program 183 times [2021-08-21 17:38:34,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:34,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909526432] [2021-08-21 17:38:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:34,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:34,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:34,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909526432] [2021-08-21 17:38:34,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909526432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:34,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686289494] [2021-08-21 17:38:34,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:38:34,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:34,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:34,674 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:34,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 17:38:36,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:38:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686289494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:36,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:36,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:36,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172297376] [2021-08-21 17:38:36,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:36,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:36,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:36,113 INFO L87 Difference]: Start difference. First operand 37210 states and 78246 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:36,550 INFO L93 Difference]: Finished difference Result 38512 states and 80853 transitions. [2021-08-21 17:38:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:38:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:36,628 INFO L225 Difference]: With dead ends: 38512 [2021-08-21 17:38:36,628 INFO L226 Difference]: Without dead ends: 38512 [2021-08-21 17:38:36,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:38:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38512 states. [2021-08-21 17:38:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38512 to 37007. [2021-08-21 17:38:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37007 states, 37006 states have (on average 2.103604820839864) internal successors, (77846), 37006 states have internal predecessors, (77846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37007 states to 37007 states and 77846 transitions. [2021-08-21 17:38:37,352 INFO L78 Accepts]: Start accepts. Automaton has 37007 states and 77846 transitions. Word has length 22 [2021-08-21 17:38:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:37,352 INFO L470 AbstractCegarLoop]: Abstraction has 37007 states and 77846 transitions. [2021-08-21 17:38:37,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37007 states and 77846 transitions. [2021-08-21 17:38:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:37,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:37,363 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:37,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:37,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:37,582 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2072646871, now seen corresponding path program 184 times [2021-08-21 17:38:37,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:37,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254535099] [2021-08-21 17:38:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:37,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:37,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:37,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254535099] [2021-08-21 17:38:37,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254535099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:37,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265730151] [2021-08-21 17:38:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:38:37,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:37,653 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:37,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 17:38:39,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:38:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:39,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265730151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:39,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:39,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:38:39,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439127397] [2021-08-21 17:38:39,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:38:39,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:38:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:38:39,122 INFO L87 Difference]: Start difference. First operand 37007 states and 77846 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:39,328 INFO L93 Difference]: Finished difference Result 37056 states and 77890 transitions. [2021-08-21 17:38:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:38:39,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 17:38:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:39,493 INFO L225 Difference]: With dead ends: 37056 [2021-08-21 17:38:39,493 INFO L226 Difference]: Without dead ends: 37054 [2021-08-21 17:38:39,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:38:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37054 states. [2021-08-21 17:38:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37054 to 37007. [2021-08-21 17:38:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37007 states, 37006 states have (on average 2.1035507755499108) internal successors, (77844), 37006 states have internal predecessors, (77844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37007 states to 37007 states and 77844 transitions. [2021-08-21 17:38:40,176 INFO L78 Accepts]: Start accepts. Automaton has 37007 states and 77844 transitions. Word has length 22 [2021-08-21 17:38:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:40,176 INFO L470 AbstractCegarLoop]: Abstraction has 37007 states and 77844 transitions. [2021-08-21 17:38:40,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 37007 states and 77844 transitions. [2021-08-21 17:38:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:40,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:40,186 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:40,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:40,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:40,401 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash 356639127, now seen corresponding path program 185 times [2021-08-21 17:38:40,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:40,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631861054] [2021-08-21 17:38:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:40,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:40,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:40,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631861054] [2021-08-21 17:38:40,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631861054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:40,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022378159] [2021-08-21 17:38:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:38:40,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:40,510 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:40,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 17:38:42,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:38:42,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:42,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:42,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022378159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:42,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:42,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:42,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255917427] [2021-08-21 17:38:42,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:42,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:42,076 INFO L87 Difference]: Start difference. First operand 37007 states and 77844 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:42,444 INFO L93 Difference]: Finished difference Result 43438 states and 90806 transitions. [2021-08-21 17:38:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:38:42,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:42,631 INFO L225 Difference]: With dead ends: 43438 [2021-08-21 17:38:42,631 INFO L226 Difference]: Without dead ends: 43438 [2021-08-21 17:38:42,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:38:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43438 states. [2021-08-21 17:38:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43438 to 41761. [2021-08-21 17:38:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41761 states, 41760 states have (on average 2.094659961685824) internal successors, (87473), 41760 states have internal predecessors, (87473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41761 states to 41761 states and 87473 transitions. [2021-08-21 17:38:43,404 INFO L78 Accepts]: Start accepts. Automaton has 41761 states and 87473 transitions. Word has length 22 [2021-08-21 17:38:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:43,404 INFO L470 AbstractCegarLoop]: Abstraction has 41761 states and 87473 transitions. [2021-08-21 17:38:43,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41761 states and 87473 transitions. [2021-08-21 17:38:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:43,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:43,417 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:43,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:43,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:43,631 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash 87892699, now seen corresponding path program 186 times [2021-08-21 17:38:43,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:43,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435646489] [2021-08-21 17:38:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:43,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:43,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:43,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435646489] [2021-08-21 17:38:43,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435646489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:43,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15533882] [2021-08-21 17:38:43,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:38:43,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:43,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:43,725 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:43,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 17:38:45,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:38:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:45,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:45,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15533882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:45,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:45,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:45,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987610044] [2021-08-21 17:38:45,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:45,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:45,254 INFO L87 Difference]: Start difference. First operand 41761 states and 87473 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:45,607 INFO L93 Difference]: Finished difference Result 45612 states and 95198 transitions. [2021-08-21 17:38:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:38:45,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:45,687 INFO L225 Difference]: With dead ends: 45612 [2021-08-21 17:38:45,687 INFO L226 Difference]: Without dead ends: 45612 [2021-08-21 17:38:45,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:38:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45612 states. [2021-08-21 17:38:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45612 to 45069. [2021-08-21 17:38:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45069 states, 45068 states have (on average 2.088532883642496) internal successors, (94126), 45068 states have internal predecessors, (94126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45069 states to 45069 states and 94126 transitions. [2021-08-21 17:38:46,480 INFO L78 Accepts]: Start accepts. Automaton has 45069 states and 94126 transitions. Word has length 22 [2021-08-21 17:38:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:46,480 INFO L470 AbstractCegarLoop]: Abstraction has 45069 states and 94126 transitions. [2021-08-21 17:38:46,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 45069 states and 94126 transitions. [2021-08-21 17:38:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:46,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:46,496 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:46,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:46,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 17:38:46,715 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash -336418537, now seen corresponding path program 187 times [2021-08-21 17:38:46,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:46,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837305839] [2021-08-21 17:38:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:46,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:46,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:46,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837305839] [2021-08-21 17:38:46,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837305839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:46,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120846164] [2021-08-21 17:38:46,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:38:46,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:46,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:46,806 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:46,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 17:38:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:48,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120846164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:48,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:48,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:38:48,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240483704] [2021-08-21 17:38:48,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:38:48,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:48,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:38:48,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:38:48,416 INFO L87 Difference]: Start difference. First operand 45069 states and 94126 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:48,792 INFO L93 Difference]: Finished difference Result 47228 states and 98444 transitions. [2021-08-21 17:38:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:38:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:48,878 INFO L225 Difference]: With dead ends: 47228 [2021-08-21 17:38:48,878 INFO L226 Difference]: Without dead ends: 47228 [2021-08-21 17:38:48,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=614, Invalid=1192, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:38:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47228 states. [2021-08-21 17:38:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47228 to 46404. [2021-08-21 17:38:49,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46404 states, 46403 states have (on average 2.0859858198823353) internal successors, (96796), 46403 states have internal predecessors, (96796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46404 states to 46404 states and 96796 transitions. [2021-08-21 17:38:49,923 INFO L78 Accepts]: Start accepts. Automaton has 46404 states and 96796 transitions. Word has length 22 [2021-08-21 17:38:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:49,923 INFO L470 AbstractCegarLoop]: Abstraction has 46404 states and 96796 transitions. [2021-08-21 17:38:49,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:49,924 INFO L276 IsEmpty]: Start isEmpty. Operand 46404 states and 96796 transitions. [2021-08-21 17:38:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:49,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:49,940 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:49,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:50,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 17:38:50,160 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:50,160 INFO L82 PathProgramCache]: Analyzing trace with hash 131877809, now seen corresponding path program 188 times [2021-08-21 17:38:50,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:50,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660335143] [2021-08-21 17:38:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:50,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:50,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:50,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660335143] [2021-08-21 17:38:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660335143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:50,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659657496] [2021-08-21 17:38:50,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:38:50,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:50,237 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:50,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 17:38:51,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:38:51,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:51,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659657496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:51,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:51,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:38:51,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578538288] [2021-08-21 17:38:51,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:38:51,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:38:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:38:51,812 INFO L87 Difference]: Start difference. First operand 46404 states and 96796 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:52,149 INFO L93 Difference]: Finished difference Result 46493 states and 96921 transitions. [2021-08-21 17:38:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:38:52,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:52,242 INFO L225 Difference]: With dead ends: 46493 [2021-08-21 17:38:52,242 INFO L226 Difference]: Without dead ends: 46491 [2021-08-21 17:38:52,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:38:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46491 states. [2021-08-21 17:38:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46491 to 46440. [2021-08-21 17:38:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46440 states, 46439 states have (on average 2.0860052972716896) internal successors, (96872), 46439 states have internal predecessors, (96872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46440 states to 46440 states and 96872 transitions. [2021-08-21 17:38:53,219 INFO L78 Accepts]: Start accepts. Automaton has 46440 states and 96872 transitions. Word has length 22 [2021-08-21 17:38:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:53,219 INFO L470 AbstractCegarLoop]: Abstraction has 46440 states and 96872 transitions. [2021-08-21 17:38:53,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 46440 states and 96872 transitions. [2021-08-21 17:38:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:53,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:53,235 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:53,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:53,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:53,454 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1586465897, now seen corresponding path program 189 times [2021-08-21 17:38:53,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:53,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871087783] [2021-08-21 17:38:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:53,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:53,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:53,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871087783] [2021-08-21 17:38:53,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871087783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:53,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826976168] [2021-08-21 17:38:53,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:38:53,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:53,707 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:53,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 17:38:55,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:38:55,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:55,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:55,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826976168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:55,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:55,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:38:55,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461422777] [2021-08-21 17:38:55,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:38:55,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:38:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:38:55,166 INFO L87 Difference]: Start difference. First operand 46440 states and 96872 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:55,366 INFO L93 Difference]: Finished difference Result 47155 states and 98241 transitions. [2021-08-21 17:38:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:38:55,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:55,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:55,455 INFO L225 Difference]: With dead ends: 47155 [2021-08-21 17:38:55,455 INFO L226 Difference]: Without dead ends: 47155 [2021-08-21 17:38:55,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:38:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47155 states. [2021-08-21 17:38:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47155 to 46445. [2021-08-21 17:38:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46445 states, 46444 states have (on average 2.0859960382396006) internal successors, (96882), 46444 states have internal predecessors, (96882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46445 states to 46445 states and 96882 transitions. [2021-08-21 17:38:56,289 INFO L78 Accepts]: Start accepts. Automaton has 46445 states and 96882 transitions. Word has length 22 [2021-08-21 17:38:56,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:56,289 INFO L470 AbstractCegarLoop]: Abstraction has 46445 states and 96882 transitions. [2021-08-21 17:38:56,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46445 states and 96882 transitions. [2021-08-21 17:38:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:56,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:56,305 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:56,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:56,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:56,524 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash 124147411, now seen corresponding path program 190 times [2021-08-21 17:38:56,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:56,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248106622] [2021-08-21 17:38:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:56,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:56,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:56,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248106622] [2021-08-21 17:38:56,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248106622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:56,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255456796] [2021-08-21 17:38:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:38:56,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:56,594 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:56,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 17:38:58,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:38:58,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:38:58,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:38:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:38:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:38:58,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255456796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:58,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:38:58,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:38:58,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839544559] [2021-08-21 17:38:58,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:38:58,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:38:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:38:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:38:58,150 INFO L87 Difference]: Start difference. First operand 46445 states and 96882 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:38:58,495 INFO L93 Difference]: Finished difference Result 47764 states and 99458 transitions. [2021-08-21 17:38:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:38:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:38:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:38:58,577 INFO L225 Difference]: With dead ends: 47764 [2021-08-21 17:38:58,577 INFO L226 Difference]: Without dead ends: 47764 [2021-08-21 17:38:58,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:38:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47764 states. [2021-08-21 17:38:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47764 to 46452. [2021-08-21 17:38:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46452 states, 46451 states have (on average 2.0859615508815743) internal successors, (96895), 46451 states have internal predecessors, (96895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46452 states to 46452 states and 96895 transitions. [2021-08-21 17:38:59,350 INFO L78 Accepts]: Start accepts. Automaton has 46452 states and 96895 transitions. Word has length 22 [2021-08-21 17:38:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:38:59,350 INFO L470 AbstractCegarLoop]: Abstraction has 46452 states and 96895 transitions. [2021-08-21 17:38:59,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:38:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 46452 states and 96895 transitions. [2021-08-21 17:38:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:38:59,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:38:59,570 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:38:59,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-21 17:38:59,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:59,781 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:38:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:38:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1613552407, now seen corresponding path program 191 times [2021-08-21 17:38:59,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:38:59,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535987476] [2021-08-21 17:38:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:38:59,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:38:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:38:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:38:59,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:38:59,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535987476] [2021-08-21 17:38:59,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535987476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:38:59,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249003769] [2021-08-21 17:38:59,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:38:59,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:38:59,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:38:59,858 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:38:59,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 17:39:01,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:39:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:01,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:01,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249003769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:01,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:01,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 17:39:01,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333646652] [2021-08-21 17:39:01,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:39:01,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:39:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:39:01,395 INFO L87 Difference]: Start difference. First operand 46452 states and 96895 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:01,695 INFO L93 Difference]: Finished difference Result 63960 states and 132355 transitions. [2021-08-21 17:39:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:39:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:39:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:01,835 INFO L225 Difference]: With dead ends: 63960 [2021-08-21 17:39:01,835 INFO L226 Difference]: Without dead ends: 63960 [2021-08-21 17:39:01,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:39:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63960 states. [2021-08-21 17:39:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63960 to 61130. [2021-08-21 17:39:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61130 states, 61129 states have (on average 2.073156766837344) internal successors, (126730), 61129 states have internal predecessors, (126730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61130 states to 61130 states and 126730 transitions. [2021-08-21 17:39:03,252 INFO L78 Accepts]: Start accepts. Automaton has 61130 states and 126730 transitions. Word has length 22 [2021-08-21 17:39:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:03,252 INFO L470 AbstractCegarLoop]: Abstraction has 61130 states and 126730 transitions. [2021-08-21 17:39:03,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 61130 states and 126730 transitions. [2021-08-21 17:39:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:03,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:03,270 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:03,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:03,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:03,490 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash 540467027, now seen corresponding path program 192 times [2021-08-21 17:39:03,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:03,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177558965] [2021-08-21 17:39:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:03,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:03,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:03,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177558965] [2021-08-21 17:39:03,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177558965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:03,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556295446] [2021-08-21 17:39:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:39:03,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:03,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:03,567 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:03,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 17:39:05,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:39:05,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:05,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556295446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:05,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:05,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:39:05,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726330184] [2021-08-21 17:39:05,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:39:05,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:39:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:39:05,200 INFO L87 Difference]: Start difference. First operand 61130 states and 126730 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:05,682 INFO L93 Difference]: Finished difference Result 63409 states and 131235 transitions. [2021-08-21 17:39:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:39:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:39:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:05,818 INFO L225 Difference]: With dead ends: 63409 [2021-08-21 17:39:05,818 INFO L226 Difference]: Without dead ends: 63409 [2021-08-21 17:39:05,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:39:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63409 states. [2021-08-21 17:39:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63409 to 61291. [2021-08-21 17:39:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61291 states, 61290 states have (on average 2.0726709087942567) internal successors, (127034), 61290 states have internal predecessors, (127034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61291 states to 61291 states and 127034 transitions. [2021-08-21 17:39:07,135 INFO L78 Accepts]: Start accepts. Automaton has 61291 states and 127034 transitions. Word has length 22 [2021-08-21 17:39:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:07,135 INFO L470 AbstractCegarLoop]: Abstraction has 61291 states and 127034 transitions. [2021-08-21 17:39:07,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 61291 states and 127034 transitions. [2021-08-21 17:39:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:07,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:07,154 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:07,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:07,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:07,374 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1634558615, now seen corresponding path program 193 times [2021-08-21 17:39:07,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:07,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154347701] [2021-08-21 17:39:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:07,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:07,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:07,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154347701] [2021-08-21 17:39:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154347701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:07,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722562008] [2021-08-21 17:39:07,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:39:07,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:07,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:07,454 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:07,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 17:39:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:09,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:09,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:09,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722562008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:09,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:09,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:39:09,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324677866] [2021-08-21 17:39:09,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:39:09,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:39:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:39:09,339 INFO L87 Difference]: Start difference. First operand 61291 states and 127034 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:09,757 INFO L93 Difference]: Finished difference Result 72440 states and 149446 transitions. [2021-08-21 17:39:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:39:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:39:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:09,942 INFO L225 Difference]: With dead ends: 72440 [2021-08-21 17:39:09,943 INFO L226 Difference]: Without dead ends: 72440 [2021-08-21 17:39:09,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:39:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72440 states. [2021-08-21 17:39:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72440 to 71187. [2021-08-21 17:39:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71187 states, 71186 states have (on average 2.064464922878094) internal successors, (146961), 71186 states have internal predecessors, (146961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71187 states to 71187 states and 146961 transitions. [2021-08-21 17:39:11,971 INFO L78 Accepts]: Start accepts. Automaton has 71187 states and 146961 transitions. Word has length 22 [2021-08-21 17:39:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:11,971 INFO L470 AbstractCegarLoop]: Abstraction has 71187 states and 146961 transitions. [2021-08-21 17:39:11,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 71187 states and 146961 transitions. [2021-08-21 17:39:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:11,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:11,994 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:12,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:12,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:12,209 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:12,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1191659475, now seen corresponding path program 194 times [2021-08-21 17:39:12,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:12,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134540481] [2021-08-21 17:39:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:12,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:12,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:12,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134540481] [2021-08-21 17:39:12,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134540481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:12,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558847313] [2021-08-21 17:39:12,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:39:12,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:12,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:12,294 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 17:39:13,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:39:13,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:13,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:13,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558847313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:13,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:13,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 17:39:13,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069083333] [2021-08-21 17:39:13,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:39:13,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:39:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:39:13,901 INFO L87 Difference]: Start difference. First operand 71187 states and 146961 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:14,373 INFO L93 Difference]: Finished difference Result 75656 states and 155896 transitions. [2021-08-21 17:39:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:39:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:39:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:14,559 INFO L225 Difference]: With dead ends: 75656 [2021-08-21 17:39:14,559 INFO L226 Difference]: Without dead ends: 75656 [2021-08-21 17:39:14,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:39:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75656 states. [2021-08-21 17:39:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75656 to 75300. [2021-08-21 17:39:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75300 states, 75299 states have (on average 2.060996825987065) internal successors, (155191), 75299 states have internal predecessors, (155191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75300 states to 75300 states and 155191 transitions. [2021-08-21 17:39:16,602 INFO L78 Accepts]: Start accepts. Automaton has 75300 states and 155191 transitions. Word has length 22 [2021-08-21 17:39:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:16,602 INFO L470 AbstractCegarLoop]: Abstraction has 75300 states and 155191 transitions. [2021-08-21 17:39:16,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 75300 states and 155191 transitions. [2021-08-21 17:39:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:16,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:16,626 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:16,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:16,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:16,841 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash 346688023, now seen corresponding path program 195 times [2021-08-21 17:39:16,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:16,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655876671] [2021-08-21 17:39:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:16,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:16,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:16,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655876671] [2021-08-21 17:39:16,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655876671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:16,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302636239] [2021-08-21 17:39:16,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:39:16,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:16,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:16,937 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:16,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 17:39:18,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:39:18,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:18,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302636239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:18,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:18,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:39:18,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862555073] [2021-08-21 17:39:18,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:39:18,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:39:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:39:18,701 INFO L87 Difference]: Start difference. First operand 75300 states and 155191 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:19,260 INFO L93 Difference]: Finished difference Result 76180 states and 156944 transitions. [2021-08-21 17:39:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:39:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:39:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:19,464 INFO L225 Difference]: With dead ends: 76180 [2021-08-21 17:39:19,465 INFO L226 Difference]: Without dead ends: 76180 [2021-08-21 17:39:19,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:39:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76180 states. [2021-08-21 17:39:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76180 to 75337. [2021-08-21 17:39:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75337 states, 75336 states have (on average 2.060966868429436) internal successors, (155265), 75336 states have internal predecessors, (155265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75337 states to 75337 states and 155265 transitions. [2021-08-21 17:39:21,567 INFO L78 Accepts]: Start accepts. Automaton has 75337 states and 155265 transitions. Word has length 22 [2021-08-21 17:39:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:21,567 INFO L470 AbstractCegarLoop]: Abstraction has 75337 states and 155265 transitions. [2021-08-21 17:39:21,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 75337 states and 155265 transitions. [2021-08-21 17:39:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:21,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:21,593 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:21,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-21 17:39:21,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:21,813 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash -77623213, now seen corresponding path program 196 times [2021-08-21 17:39:21,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:21,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873916074] [2021-08-21 17:39:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:21,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:21,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:21,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873916074] [2021-08-21 17:39:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873916074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:21,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971147560] [2021-08-21 17:39:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:39:21,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:21,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:21,916 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:21,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 17:39:23,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:39:23,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:23,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971147560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:23,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:23,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:39:23,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085049410] [2021-08-21 17:39:23,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:39:23,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:39:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:39:23,462 INFO L87 Difference]: Start difference. First operand 75337 states and 155265 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:24,088 INFO L93 Difference]: Finished difference Result 76975 states and 158541 transitions. [2021-08-21 17:39:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:39:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:39:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:24,289 INFO L225 Difference]: With dead ends: 76975 [2021-08-21 17:39:24,289 INFO L226 Difference]: Without dead ends: 76975 [2021-08-21 17:39:24,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:39:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76975 states. [2021-08-21 17:39:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76975 to 76463. [2021-08-21 17:39:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76463 states, 76462 states have (on average 2.0600690539091313) internal successors, (157517), 76462 states have internal predecessors, (157517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76463 states to 76463 states and 157517 transitions. [2021-08-21 17:39:26,328 INFO L78 Accepts]: Start accepts. Automaton has 76463 states and 157517 transitions. Word has length 22 [2021-08-21 17:39:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:26,328 INFO L470 AbstractCegarLoop]: Abstraction has 76463 states and 157517 transitions. [2021-08-21 17:39:26,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 76463 states and 157517 transitions. [2021-08-21 17:39:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:26,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:26,357 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:26,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:26,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 17:39:26,576 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash -346369641, now seen corresponding path program 197 times [2021-08-21 17:39:26,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:26,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107980752] [2021-08-21 17:39:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:26,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:26,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:26,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107980752] [2021-08-21 17:39:26,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107980752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:26,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302453990] [2021-08-21 17:39:26,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:39:26,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:26,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:26,741 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:26,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 17:39:28,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:39:28,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:28,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:28,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302453990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:28,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:28,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 17:39:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84974789] [2021-08-21 17:39:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:39:28,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:39:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:39:28,444 INFO L87 Difference]: Start difference. First operand 76463 states and 157517 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:29,016 INFO L93 Difference]: Finished difference Result 78284 states and 161159 transitions. [2021-08-21 17:39:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:39:29,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:39:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:29,188 INFO L225 Difference]: With dead ends: 78284 [2021-08-21 17:39:29,188 INFO L226 Difference]: Without dead ends: 78284 [2021-08-21 17:39:29,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=664, Invalid=1316, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:39:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78284 states. [2021-08-21 17:39:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78284 to 76905. [2021-08-21 17:39:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76905 states, 76904 states have (on average 2.059723811505253) internal successors, (158401), 76904 states have internal predecessors, (158401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76905 states to 76905 states and 158401 transitions. [2021-08-21 17:39:30,934 INFO L78 Accepts]: Start accepts. Automaton has 76905 states and 158401 transitions. Word has length 22 [2021-08-21 17:39:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:30,935 INFO L470 AbstractCegarLoop]: Abstraction has 76905 states and 158401 transitions. [2021-08-21 17:39:30,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 76905 states and 158401 transitions. [2021-08-21 17:39:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:30,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:30,958 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:30,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:31,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 17:39:31,177 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash 731065193, now seen corresponding path program 198 times [2021-08-21 17:39:31,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:31,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646717925] [2021-08-21 17:39:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:31,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:31,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:31,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646717925] [2021-08-21 17:39:31,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646717925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:31,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14758911] [2021-08-21 17:39:31,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:39:31,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:31,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:31,295 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:31,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 17:39:32,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:39:32,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:32,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:33,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14758911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:33,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:33,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 17:39:33,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629206514] [2021-08-21 17:39:33,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:39:33,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:39:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:39:33,020 INFO L87 Difference]: Start difference. First operand 76905 states and 158401 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:33,482 INFO L93 Difference]: Finished difference Result 76990 states and 158495 transitions. [2021-08-21 17:39:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:39:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:39:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:33,683 INFO L225 Difference]: With dead ends: 76990 [2021-08-21 17:39:33,683 INFO L226 Difference]: Without dead ends: 76987 [2021-08-21 17:39:33,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:39:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76987 states. [2021-08-21 17:39:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76987 to 76824. [2021-08-21 17:39:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76824 states, 76823 states have (on average 2.0594743761633887) internal successors, (158215), 76823 states have internal predecessors, (158215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76824 states to 76824 states and 158215 transitions. [2021-08-21 17:39:35,597 INFO L78 Accepts]: Start accepts. Automaton has 76824 states and 158215 transitions. Word has length 22 [2021-08-21 17:39:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 76824 states and 158215 transitions. [2021-08-21 17:39:35,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 76824 states and 158215 transitions. [2021-08-21 17:39:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:35,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:35,629 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:35,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-21 17:39:35,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-21 17:39:35,845 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash 567162383, now seen corresponding path program 199 times [2021-08-21 17:39:35,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:35,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15525042] [2021-08-21 17:39:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:35,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:35,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:35,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15525042] [2021-08-21 17:39:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15525042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:35,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005683382] [2021-08-21 17:39:35,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:39:35,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:35,947 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:35,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 17:39:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:37,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:39:37,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005683382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:37,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:37,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-21 17:39:37,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992467208] [2021-08-21 17:39:37,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:39:37,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:37,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:39:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:39:37,882 INFO L87 Difference]: Start difference. First operand 76824 states and 158215 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:38,420 INFO L93 Difference]: Finished difference Result 105013 states and 214863 transitions. [2021-08-21 17:39:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:39:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:39:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:38,682 INFO L225 Difference]: With dead ends: 105013 [2021-08-21 17:39:38,682 INFO L226 Difference]: Without dead ends: 105013 [2021-08-21 17:39:38,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:39:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105013 states. [2021-08-21 17:39:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105013 to 103294. [2021-08-21 17:39:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103294 states, 103293 states have (on average 2.0470506229851004) internal successors, (211446), 103293 states have internal predecessors, (211446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103294 states to 103294 states and 211446 transitions. [2021-08-21 17:39:41,211 INFO L78 Accepts]: Start accepts. Automaton has 103294 states and 211446 transitions. Word has length 22 [2021-08-21 17:39:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:41,211 INFO L470 AbstractCegarLoop]: Abstraction has 103294 states and 211446 transitions. [2021-08-21 17:39:41,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 103294 states and 211446 transitions. [2021-08-21 17:39:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:41,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:41,796 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:41,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:42,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 17:39:42,015 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash 124263243, now seen corresponding path program 200 times [2021-08-21 17:39:42,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:42,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003982649] [2021-08-21 17:39:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:42,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:42,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:42,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003982649] [2021-08-21 17:39:42,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003982649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:42,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707289790] [2021-08-21 17:39:42,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:39:42,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:42,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:42,122 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:42,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 17:39:43,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:39:43,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:43,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:43,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707289790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:43,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:43,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:39:43,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675892309] [2021-08-21 17:39:43,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:39:43,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:39:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:39:43,698 INFO L87 Difference]: Start difference. First operand 103294 states and 211446 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:44,417 INFO L93 Difference]: Finished difference Result 113911 states and 232632 transitions. [2021-08-21 17:39:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:39:44,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:39:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:44,748 INFO L225 Difference]: With dead ends: 113911 [2021-08-21 17:39:44,748 INFO L226 Difference]: Without dead ends: 113911 [2021-08-21 17:39:44,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:39:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113911 states. [2021-08-21 17:39:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113911 to 89427. [2021-08-21 17:39:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89427 states, 89426 states have (on average 2.0512378950193457) internal successors, (183434), 89426 states have internal predecessors, (183434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89427 states to 89427 states and 183434 transitions. [2021-08-21 17:39:47,554 INFO L78 Accepts]: Start accepts. Automaton has 89427 states and 183434 transitions. Word has length 22 [2021-08-21 17:39:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:47,554 INFO L470 AbstractCegarLoop]: Abstraction has 89427 states and 183434 transitions. [2021-08-21 17:39:47,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 89427 states and 183434 transitions. [2021-08-21 17:39:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:47,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:47,586 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:47,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:47,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:47,806 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash -720708209, now seen corresponding path program 201 times [2021-08-21 17:39:47,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:47,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701898804] [2021-08-21 17:39:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:47,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:47,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:47,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701898804] [2021-08-21 17:39:47,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701898804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:47,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289343599] [2021-08-21 17:39:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:39:47,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:47,913 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:47,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 17:39:49,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:39:49,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:49,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:49,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:49,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289343599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:49,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:49,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:39:49,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184858267] [2021-08-21 17:39:49,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:39:49,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:39:49,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:39:49,691 INFO L87 Difference]: Start difference. First operand 89427 states and 183434 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:50,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:50,500 INFO L93 Difference]: Finished difference Result 104339 states and 213345 transitions. [2021-08-21 17:39:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:39:50,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:39:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:50,815 INFO L225 Difference]: With dead ends: 104339 [2021-08-21 17:39:50,815 INFO L226 Difference]: Without dead ends: 104339 [2021-08-21 17:39:50,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 17:39:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104339 states. [2021-08-21 17:39:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104339 to 89649. [2021-08-21 17:39:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89649 states, 89648 states have (on average 2.051724522577191) internal successors, (183933), 89648 states have internal predecessors, (183933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89649 states to 89649 states and 183933 transitions. [2021-08-21 17:39:53,620 INFO L78 Accepts]: Start accepts. Automaton has 89649 states and 183933 transitions. Word has length 22 [2021-08-21 17:39:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:53,620 INFO L470 AbstractCegarLoop]: Abstraction has 89649 states and 183933 transitions. [2021-08-21 17:39:53,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 89649 states and 183933 transitions. [2021-08-21 17:39:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:53,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:53,651 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:53,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:53,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:53,871 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:53,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1145019445, now seen corresponding path program 202 times [2021-08-21 17:39:53,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:53,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343963921] [2021-08-21 17:39:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:53,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:53,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:53,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343963921] [2021-08-21 17:39:53,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343963921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:53,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64562757] [2021-08-21 17:39:53,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:39:53,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:53,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:53,982 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:53,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 17:39:55,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:39:55,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:39:55,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:39:55,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:39:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:55,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64562757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:55,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:39:55,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:39:55,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147494935] [2021-08-21 17:39:55,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:39:55,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:39:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:39:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:39:55,945 INFO L87 Difference]: Start difference. First operand 89649 states and 183933 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:39:56,672 INFO L93 Difference]: Finished difference Result 103995 states and 212640 transitions. [2021-08-21 17:39:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:39:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:39:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:39:56,947 INFO L225 Difference]: With dead ends: 103995 [2021-08-21 17:39:56,948 INFO L226 Difference]: Without dead ends: 103995 [2021-08-21 17:39:56,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:39:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103995 states. [2021-08-21 17:39:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103995 to 90407. [2021-08-21 17:39:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90407 states, 90406 states have (on average 2.051489945357609) internal successors, (185467), 90406 states have internal predecessors, (185467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90407 states to 90407 states and 185467 transitions. [2021-08-21 17:39:59,345 INFO L78 Accepts]: Start accepts. Automaton has 90407 states and 185467 transitions. Word has length 22 [2021-08-21 17:39:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:39:59,345 INFO L470 AbstractCegarLoop]: Abstraction has 90407 states and 185467 transitions. [2021-08-21 17:39:59,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:39:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 90407 states and 185467 transitions. [2021-08-21 17:39:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:39:59,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:39:59,372 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:39:59,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 17:39:59,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-21 17:39:59,592 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:39:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:39:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1287987757, now seen corresponding path program 203 times [2021-08-21 17:39:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:39:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070345004] [2021-08-21 17:39:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:39:59,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:39:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:39:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:39:59,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:39:59,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070345004] [2021-08-21 17:39:59,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070345004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:39:59,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227851997] [2021-08-21 17:39:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:39:59,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:39:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:39:59,697 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:39:59,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 17:40:01,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:40:01,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:01,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:01,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:01,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227851997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:01,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:01,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:40:01,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760673832] [2021-08-21 17:40:01,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:40:01,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:40:01,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:40:01,666 INFO L87 Difference]: Start difference. First operand 90407 states and 185467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:02,429 INFO L93 Difference]: Finished difference Result 104990 states and 214744 transitions. [2021-08-21 17:40:02,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:40:02,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:40:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:03,019 INFO L225 Difference]: With dead ends: 104990 [2021-08-21 17:40:03,019 INFO L226 Difference]: Without dead ends: 104990 [2021-08-21 17:40:03,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:40:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104990 states. [2021-08-21 17:40:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104990 to 87534. [2021-08-21 17:40:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87534 states, 87533 states have (on average 2.0533855802954313) internal successors, (179739), 87533 states have internal predecessors, (179739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87534 states to 87534 states and 179739 transitions. [2021-08-21 17:40:05,522 INFO L78 Accepts]: Start accepts. Automaton has 87534 states and 179739 transitions. Word has length 22 [2021-08-21 17:40:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:05,522 INFO L470 AbstractCegarLoop]: Abstraction has 87534 states and 179739 transitions. [2021-08-21 17:40:05,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:05,523 INFO L276 IsEmpty]: Start isEmpty. Operand 87534 states and 179739 transitions. [2021-08-21 17:40:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:05,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:05,557 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:05,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-08-21 17:40:05,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-21 17:40:05,771 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:05,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298993, now seen corresponding path program 204 times [2021-08-21 17:40:05,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:05,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076059588] [2021-08-21 17:40:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:05,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:06,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:06,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076059588] [2021-08-21 17:40:06,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076059588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:06,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232758532] [2021-08-21 17:40:06,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:40:06,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:06,297 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:06,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 17:40:08,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:40:08,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:08,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:08,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232758532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:08,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:08,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:40:08,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570140649] [2021-08-21 17:40:08,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:40:08,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:08,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:40:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:40:08,326 INFO L87 Difference]: Start difference. First operand 87534 states and 179739 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:09,349 INFO L93 Difference]: Finished difference Result 95683 states and 196038 transitions. [2021-08-21 17:40:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:40:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:40:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:09,765 INFO L225 Difference]: With dead ends: 95683 [2021-08-21 17:40:09,765 INFO L226 Difference]: Without dead ends: 95683 [2021-08-21 17:40:09,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=929, Invalid=1827, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:40:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95683 states. [2021-08-21 17:40:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95683 to 89431. [2021-08-21 17:40:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89431 states, 89430 states have (on average 2.052342614335234) internal successors, (183541), 89430 states have internal predecessors, (183541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89431 states to 89431 states and 183541 transitions. [2021-08-21 17:40:11,879 INFO L78 Accepts]: Start accepts. Automaton has 89431 states and 183541 transitions. Word has length 22 [2021-08-21 17:40:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:11,880 INFO L470 AbstractCegarLoop]: Abstraction has 89431 states and 183541 transitions. [2021-08-21 17:40:11,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 89431 states and 183541 transitions. [2021-08-21 17:40:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:12,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:12,396 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:12,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:12,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:12,633 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 258678159, now seen corresponding path program 205 times [2021-08-21 17:40:12,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:12,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99984985] [2021-08-21 17:40:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:12,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:12,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:12,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99984985] [2021-08-21 17:40:12,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99984985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:12,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702944908] [2021-08-21 17:40:12,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:40:12,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:12,740 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:12,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 17:40:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:14,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:14,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:14,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702944908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:14,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:14,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-21 17:40:14,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41070838] [2021-08-21 17:40:14,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:40:14,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:40:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:40:14,754 INFO L87 Difference]: Start difference. First operand 89431 states and 183541 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:15,403 INFO L93 Difference]: Finished difference Result 90975 states and 186597 transitions. [2021-08-21 17:40:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:40:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:40:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:15,630 INFO L225 Difference]: With dead ends: 90975 [2021-08-21 17:40:15,631 INFO L226 Difference]: Without dead ends: 90975 [2021-08-21 17:40:15,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:40:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90975 states. [2021-08-21 17:40:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90975 to 85249. [2021-08-21 17:40:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85249 states, 85248 states have (on average 2.05444115990991) internal successors, (175137), 85248 states have internal predecessors, (175137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85249 states to 85249 states and 175137 transitions. [2021-08-21 17:40:17,546 INFO L78 Accepts]: Start accepts. Automaton has 85249 states and 175137 transitions. Word has length 22 [2021-08-21 17:40:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:17,546 INFO L470 AbstractCegarLoop]: Abstraction has 85249 states and 175137 transitions. [2021-08-21 17:40:17,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 85249 states and 175137 transitions. [2021-08-21 17:40:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:17,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:17,576 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:17,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:17,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-08-21 17:40:17,799 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:17,799 INFO L82 PathProgramCache]: Analyzing trace with hash -184220981, now seen corresponding path program 206 times [2021-08-21 17:40:17,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:17,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452125417] [2021-08-21 17:40:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:17,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:17,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:17,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452125417] [2021-08-21 17:40:17,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452125417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:17,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646931940] [2021-08-21 17:40:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:40:17,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:17,919 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:17,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 17:40:19,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:40:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:19,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:19,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:40:20,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646931940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:20,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:20,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-21 17:40:20,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062693196] [2021-08-21 17:40:20,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:40:20,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:40:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:40:20,058 INFO L87 Difference]: Start difference. First operand 85249 states and 175137 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:20,593 INFO L93 Difference]: Finished difference Result 89471 states and 183580 transitions. [2021-08-21 17:40:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:40:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:40:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:20,843 INFO L225 Difference]: With dead ends: 89471 [2021-08-21 17:40:20,843 INFO L226 Difference]: Without dead ends: 89471 [2021-08-21 17:40:20,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:40:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89471 states. [2021-08-21 17:40:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89471 to 89166. [2021-08-21 17:40:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89166 states, 89165 states have (on average 2.0521168619974204) internal successors, (182977), 89165 states have internal predecessors, (182977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89166 states to 89166 states and 182977 transitions. [2021-08-21 17:40:23,244 INFO L78 Accepts]: Start accepts. Automaton has 89166 states and 182977 transitions. Word has length 22 [2021-08-21 17:40:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:23,244 INFO L470 AbstractCegarLoop]: Abstraction has 89166 states and 182977 transitions. [2021-08-21 17:40:23,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 89166 states and 182977 transitions. [2021-08-21 17:40:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:23,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:23,274 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:23,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:23,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:23,494 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1029192433, now seen corresponding path program 207 times [2021-08-21 17:40:23,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:23,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660412871] [2021-08-21 17:40:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:23,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:23,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:23,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660412871] [2021-08-21 17:40:23,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660412871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:23,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334213730] [2021-08-21 17:40:23,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:40:23,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:23,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:23,609 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:23,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 17:40:25,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:40:25,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:25,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:25,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:25,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334213730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:25,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:25,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:40:25,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209617060] [2021-08-21 17:40:25,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:40:25,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:40:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:40:25,424 INFO L87 Difference]: Start difference. First operand 89166 states and 182977 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:26,054 INFO L93 Difference]: Finished difference Result 90481 states and 185600 transitions. [2021-08-21 17:40:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:40:26,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:40:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:26,310 INFO L225 Difference]: With dead ends: 90481 [2021-08-21 17:40:26,311 INFO L226 Difference]: Without dead ends: 90481 [2021-08-21 17:40:26,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:40:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90481 states. [2021-08-21 17:40:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90481 to 86763. [2021-08-21 17:40:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86763 states, 86762 states have (on average 2.053537262857011) internal successors, (178169), 86762 states have internal predecessors, (178169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86763 states to 86763 states and 178169 transitions. [2021-08-21 17:40:28,949 INFO L78 Accepts]: Start accepts. Automaton has 86763 states and 178169 transitions. Word has length 22 [2021-08-21 17:40:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:28,949 INFO L470 AbstractCegarLoop]: Abstraction has 86763 states and 178169 transitions. [2021-08-21 17:40:28,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 86763 states and 178169 transitions. [2021-08-21 17:40:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:28,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:28,977 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:28,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:29,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 17:40:29,198 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:29,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:29,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1453503669, now seen corresponding path program 208 times [2021-08-21 17:40:29,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:29,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981123408] [2021-08-21 17:40:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:29,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:29,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:29,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981123408] [2021-08-21 17:40:29,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981123408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:29,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726086829] [2021-08-21 17:40:29,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:40:29,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:29,313 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:29,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 17:40:31,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:40:31,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:31,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:31,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726086829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:31,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:31,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:40:31,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202492483] [2021-08-21 17:40:31,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:40:31,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:40:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:40:31,097 INFO L87 Difference]: Start difference. First operand 86763 states and 178169 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:31,928 INFO L93 Difference]: Finished difference Result 88537 states and 181717 transitions. [2021-08-21 17:40:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 17:40:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:40:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:32,169 INFO L225 Difference]: With dead ends: 88537 [2021-08-21 17:40:32,170 INFO L226 Difference]: Without dead ends: 88537 [2021-08-21 17:40:32,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:40:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88537 states. [2021-08-21 17:40:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88537 to 87114. [2021-08-21 17:40:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87114 states, 87113 states have (on average 2.0533215478746) internal successors, (178871), 87113 states have internal predecessors, (178871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87114 states to 87114 states and 178871 transitions. [2021-08-21 17:40:34,316 INFO L78 Accepts]: Start accepts. Automaton has 87114 states and 178871 transitions. Word has length 22 [2021-08-21 17:40:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:34,316 INFO L470 AbstractCegarLoop]: Abstraction has 87114 states and 178871 transitions. [2021-08-21 17:40:34,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 87114 states and 178871 transitions. [2021-08-21 17:40:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:34,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:34,346 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:34,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:34,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-21 17:40:34,567 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1722250097, now seen corresponding path program 209 times [2021-08-21 17:40:34,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:34,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058025040] [2021-08-21 17:40:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:34,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:34,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:34,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058025040] [2021-08-21 17:40:34,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058025040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:34,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534259914] [2021-08-21 17:40:34,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:40:34,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:34,989 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:34,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 17:40:36,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:40:36,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534259914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:36,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:40:36,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615011856] [2021-08-21 17:40:36,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:40:36,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:40:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:40:36,724 INFO L87 Difference]: Start difference. First operand 87114 states and 178871 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:37,578 INFO L93 Difference]: Finished difference Result 88476 states and 181595 transitions. [2021-08-21 17:40:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:40:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:40:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:37,805 INFO L225 Difference]: With dead ends: 88476 [2021-08-21 17:40:37,806 INFO L226 Difference]: Without dead ends: 88476 [2021-08-21 17:40:37,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=807, Invalid=1643, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:40:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88476 states. [2021-08-21 17:40:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88476 to 87096. [2021-08-21 17:40:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87096 states, 87095 states have (on average 2.0533325678856422) internal successors, (178835), 87095 states have internal predecessors, (178835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87096 states to 87096 states and 178835 transitions. [2021-08-21 17:40:39,892 INFO L78 Accepts]: Start accepts. Automaton has 87096 states and 178835 transitions. Word has length 22 [2021-08-21 17:40:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:39,892 INFO L470 AbstractCegarLoop]: Abstraction has 87096 states and 178835 transitions. [2021-08-21 17:40:39,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 87096 states and 178835 transitions. [2021-08-21 17:40:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:39,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:39,920 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:39,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:40,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 17:40:40,133 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash 290969611, now seen corresponding path program 210 times [2021-08-21 17:40:40,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:40,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894555615] [2021-08-21 17:40:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:40,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:40,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:40,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894555615] [2021-08-21 17:40:40,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894555615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:40,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014568158] [2021-08-21 17:40:40,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:40:40,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:40,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:40,533 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:40,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 17:40:42,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 17:40:42,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:42,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014568158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:42,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:42,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-08-21 17:40:42,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751327944] [2021-08-21 17:40:42,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:40:42,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:42,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:40:42,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:40:42,302 INFO L87 Difference]: Start difference. First operand 87096 states and 178835 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:42,786 INFO L93 Difference]: Finished difference Result 87156 states and 178894 transitions. [2021-08-21 17:40:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:40:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 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 17:40:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:43,021 INFO L225 Difference]: With dead ends: 87156 [2021-08-21 17:40:43,021 INFO L226 Difference]: Without dead ends: 87154 [2021-08-21 17:40:43,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:40:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87154 states. [2021-08-21 17:40:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87154 to 87095. [2021-08-21 17:40:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87095 states, 87094 states have (on average 2.053333180242037) internal successors, (178833), 87094 states have internal predecessors, (178833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87095 states to 87095 states and 178833 transitions. [2021-08-21 17:40:45,561 INFO L78 Accepts]: Start accepts. Automaton has 87095 states and 178833 transitions. Word has length 22 [2021-08-21 17:40:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:45,561 INFO L470 AbstractCegarLoop]: Abstraction has 87095 states and 178833 transitions. [2021-08-21 17:40:45,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 87095 states and 178833 transitions. [2021-08-21 17:40:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:45,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:45,592 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:45,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2021-08-21 17:40:45,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 17:40:45,809 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2118095797, now seen corresponding path program 211 times [2021-08-21 17:40:45,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:45,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857299793] [2021-08-21 17:40:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:45,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:45,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:45,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857299793] [2021-08-21 17:40:45,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857299793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:45,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393136291] [2021-08-21 17:40:45,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:40:45,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:45,931 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:45,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 17:40:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:47,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393136291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:47,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:47,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-08-21 17:40:47,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110515901] [2021-08-21 17:40:47,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:40:47,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:40:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:40:47,825 INFO L87 Difference]: Start difference. First operand 87095 states and 178833 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:48,607 INFO L93 Difference]: Finished difference Result 96440 states and 197519 transitions. [2021-08-21 17:40:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:40:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 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 17:40:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:48,882 INFO L225 Difference]: With dead ends: 96440 [2021-08-21 17:40:48,882 INFO L226 Difference]: Without dead ends: 96440 [2021-08-21 17:40:48,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=799, Invalid=1651, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:40:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96440 states. [2021-08-21 17:40:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96440 to 92930. [2021-08-21 17:40:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92930 states, 92929 states have (on average 2.0500166794004024) internal successors, (190506), 92929 states have internal predecessors, (190506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:51,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92930 states to 92930 states and 190506 transitions. [2021-08-21 17:40:51,477 INFO L78 Accepts]: Start accepts. Automaton has 92930 states and 190506 transitions. Word has length 22 [2021-08-21 17:40:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:51,477 INFO L470 AbstractCegarLoop]: Abstraction has 92930 states and 190506 transitions. [2021-08-21 17:40:51,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 92930 states and 190506 transitions. [2021-08-21 17:40:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:51,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:51,515 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:51,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-21 17:40:51,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:51,721 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:51,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:51,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1859300473, now seen corresponding path program 212 times [2021-08-21 17:40:51,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:51,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482081325] [2021-08-21 17:40:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:51,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:51,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:51,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482081325] [2021-08-21 17:40:51,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482081325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:51,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012822783] [2021-08-21 17:40:51,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:40:51,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:51,835 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:51,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 17:40:53,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:40:53,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:53,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:53,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:53,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012822783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:53,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:53,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-08-21 17:40:53,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550433405] [2021-08-21 17:40:53,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:40:53,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:40:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:40:53,834 INFO L87 Difference]: Start difference. First operand 92930 states and 190506 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:40:54,551 INFO L93 Difference]: Finished difference Result 96963 states and 198572 transitions. [2021-08-21 17:40:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:40:54,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 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 17:40:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:40:55,006 INFO L225 Difference]: With dead ends: 96963 [2021-08-21 17:40:55,007 INFO L226 Difference]: Without dead ends: 96963 [2021-08-21 17:40:55,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:40:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96963 states. [2021-08-21 17:40:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96963 to 95594. [2021-08-21 17:40:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95594 states, 95593 states have (on average 2.0486228071093073) internal successors, (195834), 95593 states have internal predecessors, (195834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95594 states to 95594 states and 195834 transitions. [2021-08-21 17:40:57,023 INFO L78 Accepts]: Start accepts. Automaton has 95594 states and 195834 transitions. Word has length 22 [2021-08-21 17:40:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:40:57,023 INFO L470 AbstractCegarLoop]: Abstraction has 95594 states and 195834 transitions. [2021-08-21 17:40:57,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:40:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 95594 states and 195834 transitions. [2021-08-21 17:40:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:40:57,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:40:57,055 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:40:57,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-08-21 17:40:57,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-21 17:40:57,269 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:40:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:40:57,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2128046901, now seen corresponding path program 213 times [2021-08-21 17:40:57,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:40:57,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089055636] [2021-08-21 17:40:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:40:57,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:40:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:40:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:57,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:40:57,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089055636] [2021-08-21 17:40:57,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089055636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:57,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477170664] [2021-08-21 17:40:57,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:40:57,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:40:57,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:40:57,393 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:40:57,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 17:40:59,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:40:59,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:40:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:40:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:40:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:40:59,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477170664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:40:59,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:40:59,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-08-21 17:40:59,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469887888] [2021-08-21 17:40:59,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:40:59,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:40:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:40:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:40:59,348 INFO L87 Difference]: Start difference. First operand 95594 states and 195834 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:00,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:00,034 INFO L93 Difference]: Finished difference Result 97834 states and 200314 transitions. [2021-08-21 17:41:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:41:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 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 17:41:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:00,236 INFO L225 Difference]: With dead ends: 97834 [2021-08-21 17:41:00,237 INFO L226 Difference]: Without dead ends: 97834 [2021-08-21 17:41:00,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 17:41:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97834 states. [2021-08-21 17:41:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97834 to 96147. [2021-08-21 17:41:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96147 states, 96146 states have (on average 2.0483431448006155) internal successors, (196940), 96146 states have internal predecessors, (196940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96147 states to 96147 states and 196940 transitions. [2021-08-21 17:41:02,169 INFO L78 Accepts]: Start accepts. Automaton has 96147 states and 196940 transitions. Word has length 22 [2021-08-21 17:41:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:02,169 INFO L470 AbstractCegarLoop]: Abstraction has 96147 states and 196940 transitions. [2021-08-21 17:41:02,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 96147 states and 196940 transitions. [2021-08-21 17:41:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:02,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:02,202 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:02,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:02,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:02,423 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2077888297, now seen corresponding path program 214 times [2021-08-21 17:41:02,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:02,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146732624] [2021-08-21 17:41:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:02,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:02,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:02,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146732624] [2021-08-21 17:41:02,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146732624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:02,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37323956] [2021-08-21 17:41:02,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:41:02,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:02,805 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:02,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 17:41:04,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:41:04,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:04,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:04,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:04,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37323956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:04,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:04,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-08-21 17:41:04,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61928146] [2021-08-21 17:41:04,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:41:04,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:41:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:41:04,492 INFO L87 Difference]: Start difference. First operand 96147 states and 196940 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:05,102 INFO L93 Difference]: Finished difference Result 96412 states and 197445 transitions. [2021-08-21 17:41:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:41:05,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:05,355 INFO L225 Difference]: With dead ends: 96412 [2021-08-21 17:41:05,355 INFO L226 Difference]: Without dead ends: 96411 [2021-08-21 17:41:05,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:41:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96411 states. [2021-08-21 17:41:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96411 to 96368. [2021-08-21 17:41:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96368 states, 96367 states have (on average 2.0484917035914783) internal successors, (197407), 96367 states have internal predecessors, (197407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96368 states to 96368 states and 197407 transitions. [2021-08-21 17:41:07,766 INFO L78 Accepts]: Start accepts. Automaton has 96368 states and 197407 transitions. Word has length 22 [2021-08-21 17:41:07,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:07,767 INFO L470 AbstractCegarLoop]: Abstraction has 96368 states and 197407 transitions. [2021-08-21 17:41:07,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 96368 states and 197407 transitions. [2021-08-21 17:41:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:08,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:08,123 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:08,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:08,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:08,344 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:08,344 INFO L82 PathProgramCache]: Analyzing trace with hash 359544591, now seen corresponding path program 215 times [2021-08-21 17:41:08,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:08,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146925003] [2021-08-21 17:41:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:08,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:08,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:08,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146925003] [2021-08-21 17:41:08,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146925003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:08,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681911733] [2021-08-21 17:41:08,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:41:08,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:08,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:08,458 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:08,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 17:41:10,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:41:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:10,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:10,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:10,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681911733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:10,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:10,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-08-21 17:41:10,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903440476] [2021-08-21 17:41:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:41:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:41:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:41:10,230 INFO L87 Difference]: Start difference. First operand 96368 states and 197407 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:10,782 INFO L93 Difference]: Finished difference Result 98115 states and 200852 transitions. [2021-08-21 17:41:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:41:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:11,043 INFO L225 Difference]: With dead ends: 98115 [2021-08-21 17:41:11,043 INFO L226 Difference]: Without dead ends: 98115 [2021-08-21 17:41:11,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:41:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98115 states. [2021-08-21 17:41:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98115 to 96370. [2021-08-21 17:41:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96370 states, 96369 states have (on average 2.0484906972159096) internal successors, (197411), 96369 states have internal predecessors, (197411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96370 states to 96370 states and 197411 transitions. [2021-08-21 17:41:13,715 INFO L78 Accepts]: Start accepts. Automaton has 96370 states and 197411 transitions. Word has length 22 [2021-08-21 17:41:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:13,715 INFO L470 AbstractCegarLoop]: Abstraction has 96370 states and 197411 transitions. [2021-08-21 17:41:13,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 96370 states and 197411 transitions. [2021-08-21 17:41:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:13,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:13,753 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:13,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:13,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-08-21 17:41:13,968 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:13,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:13,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2070157899, now seen corresponding path program 216 times [2021-08-21 17:41:13,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:13,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342321411] [2021-08-21 17:41:13,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:13,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:14,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:14,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342321411] [2021-08-21 17:41:14,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342321411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:14,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870311852] [2021-08-21 17:41:14,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:41:14,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:14,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:14,085 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 17:41:15,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:41:15,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:15,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:15,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870311852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:15,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:15,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-08-21 17:41:15,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138837994] [2021-08-21 17:41:15,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:41:15,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:41:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:41:15,949 INFO L87 Difference]: Start difference. First operand 96370 states and 197411 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:16,629 INFO L93 Difference]: Finished difference Result 99806 states and 204234 transitions. [2021-08-21 17:41:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:41:16,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:16,925 INFO L225 Difference]: With dead ends: 99806 [2021-08-21 17:41:16,925 INFO L226 Difference]: Without dead ends: 99806 [2021-08-21 17:41:16,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:41:17,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99806 states. [2021-08-21 17:41:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99806 to 96380. [2021-08-21 17:41:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96380 states, 96379 states have (on average 2.048485665964577) internal successors, (197431), 96379 states have internal predecessors, (197431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96380 states to 96380 states and 197431 transitions. [2021-08-21 17:41:19,780 INFO L78 Accepts]: Start accepts. Automaton has 96380 states and 197431 transitions. Word has length 22 [2021-08-21 17:41:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:19,780 INFO L470 AbstractCegarLoop]: Abstraction has 96380 states and 197431 transitions. [2021-08-21 17:41:19,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 96380 states and 197431 transitions. [2021-08-21 17:41:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:19,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:19,819 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:19,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:20,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:20,036 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:20,036 INFO L82 PathProgramCache]: Analyzing trace with hash -735404401, now seen corresponding path program 217 times [2021-08-21 17:41:20,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:20,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396129112] [2021-08-21 17:41:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:20,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:20,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:20,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396129112] [2021-08-21 17:41:20,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396129112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:20,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995487624] [2021-08-21 17:41:20,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:41:20,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:20,151 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:20,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 17:41:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:21,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:21,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:21,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995487624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:21,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:21,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-08-21 17:41:21,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817053010] [2021-08-21 17:41:21,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:41:21,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:41:21,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:41:21,939 INFO L87 Difference]: Start difference. First operand 96380 states and 197431 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:22,638 INFO L93 Difference]: Finished difference Result 103174 states and 211076 transitions. [2021-08-21 17:41:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:41:22,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:22,943 INFO L225 Difference]: With dead ends: 103174 [2021-08-21 17:41:22,943 INFO L226 Difference]: Without dead ends: 103174 [2021-08-21 17:41:22,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:41:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103174 states. [2021-08-21 17:41:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103174 to 100061. [2021-08-21 17:41:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100061 states, 100060 states have (on average 2.0476214271437136) internal successors, (204885), 100060 states have internal predecessors, (204885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100061 states to 100061 states and 204885 transitions. [2021-08-21 17:41:25,674 INFO L78 Accepts]: Start accepts. Automaton has 100061 states and 204885 transitions. Word has length 22 [2021-08-21 17:41:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:25,675 INFO L470 AbstractCegarLoop]: Abstraction has 100061 states and 204885 transitions. [2021-08-21 17:41:25,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 100061 states and 204885 transitions. [2021-08-21 17:41:25,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:25,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:25,709 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:25,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:25,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:25,929 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1808489781, now seen corresponding path program 218 times [2021-08-21 17:41:25,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:25,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494871470] [2021-08-21 17:41:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:25,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:26,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:26,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494871470] [2021-08-21 17:41:26,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494871470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:26,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929684613] [2021-08-21 17:41:26,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:41:26,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:26,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:26,057 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:26,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 17:41:28,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:41:28,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:28,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:28,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:28,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929684613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:28,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:28,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2021-08-21 17:41:28,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412765998] [2021-08-21 17:41:28,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:41:28,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:41:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:41:28,099 INFO L87 Difference]: Start difference. First operand 100061 states and 204885 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:28,782 INFO L93 Difference]: Finished difference Result 117011 states and 238814 transitions. [2021-08-21 17:41:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:41:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:29,209 INFO L225 Difference]: With dead ends: 117011 [2021-08-21 17:41:29,209 INFO L226 Difference]: Without dead ends: 117011 [2021-08-21 17:41:29,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=533, Invalid=1189, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:41:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117011 states. [2021-08-21 17:41:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117011 to 114197. [2021-08-21 17:41:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114197 states, 114196 states have (on average 2.042164349013976) internal successors, (233207), 114196 states have internal predecessors, (233207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114197 states to 114197 states and 233207 transitions. [2021-08-21 17:41:32,097 INFO L78 Accepts]: Start accepts. Automaton has 114197 states and 233207 transitions. Word has length 22 [2021-08-21 17:41:32,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:32,097 INFO L470 AbstractCegarLoop]: Abstraction has 114197 states and 233207 transitions. [2021-08-21 17:41:32,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 114197 states and 233207 transitions. [2021-08-21 17:41:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:32,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:32,138 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:32,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:32,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 17:41:32,358 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash -714398193, now seen corresponding path program 219 times [2021-08-21 17:41:32,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:32,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773819490] [2021-08-21 17:41:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:32,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:32,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:32,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773819490] [2021-08-21 17:41:32,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773819490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:32,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799873588] [2021-08-21 17:41:32,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:41:32,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:32,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:32,463 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:32,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 17:41:34,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:41:34,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:34,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799873588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:34,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:34,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-08-21 17:41:34,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144290184] [2021-08-21 17:41:34,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:41:34,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:41:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:41:34,453 INFO L87 Difference]: Start difference. First operand 114197 states and 233207 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:35,308 INFO L93 Difference]: Finished difference Result 116510 states and 237811 transitions. [2021-08-21 17:41:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:41:35,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:35,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:35,650 INFO L225 Difference]: With dead ends: 116510 [2021-08-21 17:41:35,651 INFO L226 Difference]: Without dead ends: 116510 [2021-08-21 17:41:35,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:41:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116510 states. [2021-08-21 17:41:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116510 to 114317. [2021-08-21 17:41:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114317 states, 114316 states have (on average 2.042111340494769) internal successors, (233446), 114316 states have internal predecessors, (233446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114317 states to 114317 states and 233446 transitions. [2021-08-21 17:41:38,677 INFO L78 Accepts]: Start accepts. Automaton has 114317 states and 233446 transitions. Word has length 22 [2021-08-21 17:41:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:38,677 INFO L470 AbstractCegarLoop]: Abstraction has 114317 states and 233446 transitions. [2021-08-21 17:41:38,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 114317 states and 233446 transitions. [2021-08-21 17:41:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:38,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:38,721 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:38,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:38,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 17:41:38,942 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:38,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:38,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1157297333, now seen corresponding path program 220 times [2021-08-21 17:41:38,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:38,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186627771] [2021-08-21 17:41:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:38,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:39,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:39,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186627771] [2021-08-21 17:41:39,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186627771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:39,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665266320] [2021-08-21 17:41:39,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:41:39,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:39,403 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:39,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 17:41:41,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:41:41,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:41,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:41,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:41,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665266320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:41,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:41,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-08-21 17:41:41,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613657306] [2021-08-21 17:41:41,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:41:41,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:41:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:41:41,111 INFO L87 Difference]: Start difference. First operand 114317 states and 233446 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:41,904 INFO L93 Difference]: Finished difference Result 129045 states and 262903 transitions. [2021-08-21 17:41:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:41:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:42,250 INFO L225 Difference]: With dead ends: 129045 [2021-08-21 17:41:42,250 INFO L226 Difference]: Without dead ends: 129045 [2021-08-21 17:41:42,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:41:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129045 states. [2021-08-21 17:41:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129045 to 127832. [2021-08-21 17:41:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127832 states, 127831 states have (on average 2.0377216794048394) internal successors, (260484), 127831 states have internal predecessors, (260484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127832 states to 127832 states and 260484 transitions. [2021-08-21 17:41:45,615 INFO L78 Accepts]: Start accepts. Automaton has 127832 states and 260484 transitions. Word has length 22 [2021-08-21 17:41:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:45,616 INFO L470 AbstractCegarLoop]: Abstraction has 127832 states and 260484 transitions. [2021-08-21 17:41:45,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 127832 states and 260484 transitions. [2021-08-21 17:41:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:45,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:45,661 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:45,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:45,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 17:41:45,862 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:45,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2002268785, now seen corresponding path program 221 times [2021-08-21 17:41:45,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:45,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709202861] [2021-08-21 17:41:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:45,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:45,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:45,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709202861] [2021-08-21 17:41:45,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709202861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:45,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827282412] [2021-08-21 17:41:45,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:41:45,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:45,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:45,970 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:45,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 17:41:47,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:41:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:47,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:41:48,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827282412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:48,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:48,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-08-21 17:41:48,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414873859] [2021-08-21 17:41:48,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:41:48,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:41:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:41:48,090 INFO L87 Difference]: Start difference. First operand 127832 states and 260484 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:48,960 INFO L93 Difference]: Finished difference Result 130971 states and 266762 transitions. [2021-08-21 17:41:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:41:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:49,319 INFO L225 Difference]: With dead ends: 130971 [2021-08-21 17:41:49,319 INFO L226 Difference]: Without dead ends: 130971 [2021-08-21 17:41:49,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:41:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130971 states. [2021-08-21 17:41:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130971 to 130233. [2021-08-21 17:41:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130233 states, 130232 states have (on average 2.037026230112415) internal successors, (265286), 130232 states have internal predecessors, (265286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130233 states to 130233 states and 265286 transitions. [2021-08-21 17:41:52,685 INFO L78 Accepts]: Start accepts. Automaton has 130233 states and 265286 transitions. Word has length 22 [2021-08-21 17:41:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:41:52,685 INFO L470 AbstractCegarLoop]: Abstraction has 130233 states and 265286 transitions. [2021-08-21 17:41:52,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 130233 states and 265286 transitions. [2021-08-21 17:41:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:41:52,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:41:52,728 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:41:52,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-21 17:41:52,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 17:41:52,945 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:41:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:41:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1868387275, now seen corresponding path program 222 times [2021-08-21 17:41:52,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:41:52,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514192993] [2021-08-21 17:41:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:41:52,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:41:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:41:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:53,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:41:53,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514192993] [2021-08-21 17:41:53,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514192993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:53,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487912871] [2021-08-21 17:41:53,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:41:53,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:41:53,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:41:53,069 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:41:53,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 17:41:54,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:41:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:41:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:41:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:41:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:41:55,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487912871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:41:55,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:41:55,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-08-21 17:41:55,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553767456] [2021-08-21 17:41:55,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 17:41:55,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:41:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 17:41:55,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:41:55,082 INFO L87 Difference]: Start difference. First operand 130233 states and 265286 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:41:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:41:55,964 INFO L93 Difference]: Finished difference Result 131855 states and 268530 transitions. [2021-08-21 17:41:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:41:55,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:41:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:41:56,377 INFO L225 Difference]: With dead ends: 131855 [2021-08-21 17:41:56,377 INFO L226 Difference]: Without dead ends: 131855 [2021-08-21 17:41:56,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=552, Invalid=1254, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:41:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131855 states. [2021-08-21 17:41:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131855 to 130292. [2021-08-21 17:41:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130292 states, 130291 states have (on average 2.0370094634318563) internal successors, (265404), 130291 states have internal predecessors, (265404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130292 states to 130292 states and 265404 transitions. [2021-08-21 17:42:00,077 INFO L78 Accepts]: Start accepts. Automaton has 130292 states and 265404 transitions. Word has length 22 [2021-08-21 17:42:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:00,077 INFO L470 AbstractCegarLoop]: Abstraction has 130292 states and 265404 transitions. [2021-08-21 17:42:00,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 130292 states and 265404 transitions. [2021-08-21 17:42:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:42:00,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:00,117 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:00,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:00,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-21 17:42:00,338 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1599640847, now seen corresponding path program 223 times [2021-08-21 17:42:00,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:00,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56363412] [2021-08-21 17:42:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:00,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:00,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:00,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56363412] [2021-08-21 17:42:00,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56363412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:00,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288448811] [2021-08-21 17:42:00,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:00,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:00,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:00,458 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:00,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 17:42:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:02,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:42:02,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:02,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288448811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:02,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:02,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-08-21 17:42:02,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984220422] [2021-08-21 17:42:02,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 17:42:02,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 17:42:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:42:02,508 INFO L87 Difference]: Start difference. First operand 130292 states and 265404 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:03,333 INFO L93 Difference]: Finished difference Result 132188 states and 269196 transitions. [2021-08-21 17:42:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:42:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:42:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:03,691 INFO L225 Difference]: With dead ends: 132188 [2021-08-21 17:42:03,691 INFO L226 Difference]: Without dead ends: 132188 [2021-08-21 17:42:03,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:42:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132188 states. [2021-08-21 17:42:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132188 to 130607. [2021-08-21 17:42:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130607 states, 130606 states have (on average 2.036920202747194) internal successors, (266034), 130606 states have internal predecessors, (266034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130607 states to 130607 states and 266034 transitions. [2021-08-21 17:42:07,268 INFO L78 Accepts]: Start accepts. Automaton has 130607 states and 266034 transitions. Word has length 22 [2021-08-21 17:42:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:07,269 INFO L470 AbstractCegarLoop]: Abstraction has 130607 states and 266034 transitions. [2021-08-21 17:42:07,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 130607 states and 266034 transitions. [2021-08-21 17:42:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:42:07,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:07,311 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:07,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:07,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:07,533 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1858436171, now seen corresponding path program 224 times [2021-08-21 17:42:07,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:07,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151448223] [2021-08-21 17:42:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:07,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:07,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:07,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151448223] [2021-08-21 17:42:07,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151448223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:07,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003577466] [2021-08-21 17:42:07,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:07,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:07,653 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:07,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 17:42:09,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:09,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:42:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:09,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003577466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:09,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:09,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-08-21 17:42:09,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620508853] [2021-08-21 17:42:09,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:42:09,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:42:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:42:09,785 INFO L87 Difference]: Start difference. First operand 130607 states and 266034 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:10,820 INFO L93 Difference]: Finished difference Result 134902 states and 274624 transitions. [2021-08-21 17:42:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:42:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 17:42:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:11,202 INFO L225 Difference]: With dead ends: 134902 [2021-08-21 17:42:11,202 INFO L226 Difference]: Without dead ends: 134902 [2021-08-21 17:42:11,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=851, Invalid=1905, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:42:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134902 states. [2021-08-21 17:42:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134902 to 130673. [2021-08-21 17:42:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130673 states, 130672 states have (on average 2.03690155503857) internal successors, (266166), 130672 states have internal predecessors, (266166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130673 states to 130673 states and 266166 transitions. [2021-08-21 17:42:14,657 INFO L78 Accepts]: Start accepts. Automaton has 130673 states and 266166 transitions. Word has length 22 [2021-08-21 17:42:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:14,657 INFO L470 AbstractCegarLoop]: Abstraction has 130673 states and 266166 transitions. [2021-08-21 17:42:14,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 130673 states and 266166 transitions. [2021-08-21 17:42:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:42:14,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:14,718 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:14,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:14,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:14,933 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash 677314119, now seen corresponding path program 225 times [2021-08-21 17:42:14,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:14,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927468117] [2021-08-21 17:42:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:14,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:15,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:15,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927468117] [2021-08-21 17:42:15,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927468117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:15,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97623903] [2021-08-21 17:42:15,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:15,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:15,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:15,066 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:15,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 17:42:17,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:42:17,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:42:17,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:42:17,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97623903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:17,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:17,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 17:42:17,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844630099] [2021-08-21 17:42:17,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:42:17,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:17,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:42:17,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:42:17,111 INFO L87 Difference]: Start difference. First operand 130673 states and 266166 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:17,892 INFO L93 Difference]: Finished difference Result 130782 states and 266358 transitions. [2021-08-21 17:42:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:42:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:42:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:18,261 INFO L225 Difference]: With dead ends: 130782 [2021-08-21 17:42:18,262 INFO L226 Difference]: Without dead ends: 130777 [2021-08-21 17:42:18,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:42:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130777 states. [2021-08-21 17:42:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130777 to 130673. [2021-08-21 17:42:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130673 states, 130672 states have (on average 2.0368785967919676) internal successors, (266163), 130672 states have internal predecessors, (266163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130673 states to 130673 states and 266163 transitions. [2021-08-21 17:42:21,987 INFO L78 Accepts]: Start accepts. Automaton has 130673 states and 266163 transitions. Word has length 24 [2021-08-21 17:42:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:21,987 INFO L470 AbstractCegarLoop]: Abstraction has 130673 states and 266163 transitions. [2021-08-21 17:42:21,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 130673 states and 266163 transitions. [2021-08-21 17:42:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:42:22,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:22,051 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:22,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:22,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 17:42:22,272 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 631432045, now seen corresponding path program 226 times [2021-08-21 17:42:22,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:22,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662825496] [2021-08-21 17:42:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:22,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:42:22,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:22,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662825496] [2021-08-21 17:42:22,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662825496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:22,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433246443] [2021-08-21 17:42:22,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:42:22,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:22,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:22,399 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:22,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 17:42:24,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:42:24,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:24,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:42:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:42:24,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433246443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:24,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:24,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:42:24,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525691850] [2021-08-21 17:42:24,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:42:24,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:42:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:42:24,699 INFO L87 Difference]: Start difference. First operand 130673 states and 266163 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:25,262 INFO L93 Difference]: Finished difference Result 130902 states and 266597 transitions. [2021-08-21 17:42:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:42:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:42:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:25,801 INFO L225 Difference]: With dead ends: 130902 [2021-08-21 17:42:25,801 INFO L226 Difference]: Without dead ends: 130901 [2021-08-21 17:42:25,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:42:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130901 states. [2021-08-21 17:42:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130901 to 130741. [2021-08-21 17:42:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130741 states, 130740 states have (on average 2.0370812299219825) internal successors, (266328), 130740 states have internal predecessors, (266328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130741 states to 130741 states and 266328 transitions. [2021-08-21 17:42:29,343 INFO L78 Accepts]: Start accepts. Automaton has 130741 states and 266328 transitions. Word has length 24 [2021-08-21 17:42:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:29,343 INFO L470 AbstractCegarLoop]: Abstraction has 130741 states and 266328 transitions. [2021-08-21 17:42:29,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 130741 states and 266328 transitions. [2021-08-21 17:42:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:42:29,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:29,387 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:29,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:29,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:29,607 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1886989067, now seen corresponding path program 227 times [2021-08-21 17:42:29,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:29,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826134473] [2021-08-21 17:42:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:29,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:42:29,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:29,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826134473] [2021-08-21 17:42:29,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826134473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:29,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549529437] [2021-08-21 17:42:29,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:42:29,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:29,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:29,698 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:29,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 17:42:31,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 17:42:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:42:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:42:31,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549529437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:31,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:31,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:42:31,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006807216] [2021-08-21 17:42:31,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:42:31,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:31,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:42:31,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:42:31,661 INFO L87 Difference]: Start difference. First operand 130741 states and 266328 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:32,251 INFO L93 Difference]: Finished difference Result 130974 states and 266764 transitions. [2021-08-21 17:42:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:42:32,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:42:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:32,645 INFO L225 Difference]: With dead ends: 130974 [2021-08-21 17:42:32,645 INFO L226 Difference]: Without dead ends: 130973 [2021-08-21 17:42:32,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:42:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130973 states. [2021-08-21 17:42:35,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130973 to 130805. [2021-08-21 17:42:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130805 states, 130804 states have (on average 2.0372312773309686) internal successors, (266478), 130804 states have internal predecessors, (266478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130805 states to 130805 states and 266478 transitions. [2021-08-21 17:42:36,529 INFO L78 Accepts]: Start accepts. Automaton has 130805 states and 266478 transitions. Word has length 24 [2021-08-21 17:42:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:36,529 INFO L470 AbstractCegarLoop]: Abstraction has 130805 states and 266478 transitions. [2021-08-21 17:42:36,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 130805 states and 266478 transitions. [2021-08-21 17:42:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:42:36,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:36,592 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:36,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:36,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:36,805 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1646335085, now seen corresponding path program 228 times [2021-08-21 17:42:36,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:36,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43414409] [2021-08-21 17:42:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:36,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:42:36,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:36,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43414409] [2021-08-21 17:42:36,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43414409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:36,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126380474] [2021-08-21 17:42:36,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:42:36,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:36,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:36,884 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:36,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 17:42:38,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 17:42:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:42:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:42:38,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126380474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:38,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:38,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:42:38,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039601143] [2021-08-21 17:42:38,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:42:38,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:42:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:42:38,741 INFO L87 Difference]: Start difference. First operand 130805 states and 266478 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:39,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:39,362 INFO L93 Difference]: Finished difference Result 130992 states and 266808 transitions. [2021-08-21 17:42:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:42:39,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:42:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:39,736 INFO L225 Difference]: With dead ends: 130992 [2021-08-21 17:42:39,736 INFO L226 Difference]: Without dead ends: 130991 [2021-08-21 17:42:39,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:42:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130991 states. [2021-08-21 17:42:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130991 to 130837. [2021-08-21 17:42:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130837 states, 130836 states have (on average 2.037222171267847) internal successors, (266542), 130836 states have internal predecessors, (266542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130837 states to 130837 states and 266542 transitions. [2021-08-21 17:42:43,134 INFO L78 Accepts]: Start accepts. Automaton has 130837 states and 266542 transitions. Word has length 24 [2021-08-21 17:42:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:43,134 INFO L470 AbstractCegarLoop]: Abstraction has 130837 states and 266542 transitions. [2021-08-21 17:42:43,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 130837 states and 266542 transitions. [2021-08-21 17:42:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:42:43,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:43,555 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:43,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:43,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:43,785 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash -489765899, now seen corresponding path program 229 times [2021-08-21 17:42:43,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:43,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970637461] [2021-08-21 17:42:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:43,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:42:43,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:43,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970637461] [2021-08-21 17:42:43,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970637461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:43,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512756596] [2021-08-21 17:42:43,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:42:43,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:43,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:43,860 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:43,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 17:42:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:45,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:42:45,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:42:45,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512756596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:45,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:45,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:42:45,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776943630] [2021-08-21 17:42:45,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:42:45,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:42:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:42:45,733 INFO L87 Difference]: Start difference. First operand 130837 states and 266542 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:46,325 INFO L93 Difference]: Finished difference Result 131016 states and 266860 transitions. [2021-08-21 17:42:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:42:46,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:42:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:46,698 INFO L225 Difference]: With dead ends: 131016 [2021-08-21 17:42:46,698 INFO L226 Difference]: Without dead ends: 131016 [2021-08-21 17:42:46,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=114, Invalid=158, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:42:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131016 states. [2021-08-21 17:42:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131016 to 130858. [2021-08-21 17:42:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130858 states, 130857 states have (on average 2.037284975201938) internal successors, (266593), 130857 states have internal predecessors, (266593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130858 states to 130858 states and 266593 transitions. [2021-08-21 17:42:50,258 INFO L78 Accepts]: Start accepts. Automaton has 130858 states and 266593 transitions. Word has length 24 [2021-08-21 17:42:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:50,259 INFO L470 AbstractCegarLoop]: Abstraction has 130858 states and 266593 transitions. [2021-08-21 17:42:50,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 130858 states and 266593 transitions. [2021-08-21 17:42:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:42:50,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:50,317 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:50,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:50,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 17:42:50,538 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:50,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:50,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2010580333, now seen corresponding path program 230 times [2021-08-21 17:42:50,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:50,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695782330] [2021-08-21 17:42:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:50,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:42:50,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:50,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695782330] [2021-08-21 17:42:50,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695782330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:50,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490482096] [2021-08-21 17:42:50,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:42:50,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:50,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:50,985 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:50,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 17:42:52,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:42:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:42:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:42:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:42:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:42:52,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490482096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:52,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:42:52,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-08-21 17:42:52,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117344028] [2021-08-21 17:42:52,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:42:52,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:42:52,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:42:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:42:52,887 INFO L87 Difference]: Start difference. First operand 130858 states and 266593 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:42:53,587 INFO L93 Difference]: Finished difference Result 131095 states and 267030 transitions. [2021-08-21 17:42:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:42:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:42:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:42:53,960 INFO L225 Difference]: With dead ends: 131095 [2021-08-21 17:42:53,960 INFO L226 Difference]: Without dead ends: 131095 [2021-08-21 17:42:53,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:42:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131095 states. [2021-08-21 17:42:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131095 to 130819. [2021-08-21 17:42:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130819 states, 130818 states have (on average 2.0372120044642172) internal successors, (266504), 130818 states have internal predecessors, (266504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130819 states to 130819 states and 266504 transitions. [2021-08-21 17:42:57,686 INFO L78 Accepts]: Start accepts. Automaton has 130819 states and 266504 transitions. Word has length 24 [2021-08-21 17:42:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:42:57,686 INFO L470 AbstractCegarLoop]: Abstraction has 130819 states and 266504 transitions. [2021-08-21 17:42:57,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:42:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 130819 states and 266504 transitions. [2021-08-21 17:42:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:42:57,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:42:57,741 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:42:57,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-21 17:42:57,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 17:42:57,962 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:42:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:42:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2083065099, now seen corresponding path program 231 times [2021-08-21 17:42:57,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:42:57,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577468770] [2021-08-21 17:42:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:42:57,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:42:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:42:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:42:58,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:42:58,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577468770] [2021-08-21 17:42:58,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577468770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:42:58,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672023949] [2021-08-21 17:42:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:42:58,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:42:58,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:42:58,042 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:42:58,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 17:43:00,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:43:00,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:00,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:43:00,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672023949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:00,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:00,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:43:00,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895577621] [2021-08-21 17:43:00,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:43:00,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:43:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:43:00,201 INFO L87 Difference]: Start difference. First operand 130819 states and 266504 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:00,978 INFO L93 Difference]: Finished difference Result 130982 states and 266768 transitions. [2021-08-21 17:43:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:43:00,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:43:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:01,333 INFO L225 Difference]: With dead ends: 130982 [2021-08-21 17:43:01,333 INFO L226 Difference]: Without dead ends: 130981 [2021-08-21 17:43:01,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:43:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130981 states. [2021-08-21 17:43:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130981 to 130849. [2021-08-21 17:43:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130849 states, 130848 states have (on average 2.037272254830032) internal successors, (266573), 130848 states have internal predecessors, (266573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130849 states to 130849 states and 266573 transitions. [2021-08-21 17:43:04,639 INFO L78 Accepts]: Start accepts. Automaton has 130849 states and 266573 transitions. Word has length 24 [2021-08-21 17:43:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:04,640 INFO L470 AbstractCegarLoop]: Abstraction has 130849 states and 266573 transitions. [2021-08-21 17:43:04,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 130849 states and 266573 transitions. [2021-08-21 17:43:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:04,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:04,690 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:04,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:04,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 17:43:04,910 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:04,911 INFO L82 PathProgramCache]: Analyzing trace with hash -731444819, now seen corresponding path program 232 times [2021-08-21 17:43:04,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:04,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479897314] [2021-08-21 17:43:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:04,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:05,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:05,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479897314] [2021-08-21 17:43:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479897314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:05,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27783444] [2021-08-21 17:43:05,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:05,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:05,010 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:05,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 17:43:07,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:07,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27783444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:07,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:07,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:43:07,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974227884] [2021-08-21 17:43:07,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:43:07,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:07,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:43:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:43:07,186 INFO L87 Difference]: Start difference. First operand 130849 states and 266573 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:07,811 INFO L93 Difference]: Finished difference Result 130980 states and 266798 transitions. [2021-08-21 17:43:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:43:07,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:43:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:08,377 INFO L225 Difference]: With dead ends: 130980 [2021-08-21 17:43:08,377 INFO L226 Difference]: Without dead ends: 130978 [2021-08-21 17:43:08,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:43:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130978 states. [2021-08-21 17:43:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130978 to 130804. [2021-08-21 17:43:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130804 states, 130803 states have (on average 2.03711688569834) internal successors, (266461), 130803 states have internal predecessors, (266461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130804 states to 130804 states and 266461 transitions. [2021-08-21 17:43:12,033 INFO L78 Accepts]: Start accepts. Automaton has 130804 states and 266461 transitions. Word has length 24 [2021-08-21 17:43:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:12,034 INFO L470 AbstractCegarLoop]: Abstraction has 130804 states and 266461 transitions. [2021-08-21 17:43:12,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 130804 states and 266461 transitions. [2021-08-21 17:43:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:12,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:12,088 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:12,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 17:43:12,300 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash 649677063, now seen corresponding path program 233 times [2021-08-21 17:43:12,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:12,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797386338] [2021-08-21 17:43:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:12,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:12,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797386338] [2021-08-21 17:43:12,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797386338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680394072] [2021-08-21 17:43:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:12,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:12,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:12,381 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:12,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 17:43:14,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:43:14,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:14,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:14,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680394072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:14,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:14,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:43:14,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139336371] [2021-08-21 17:43:14,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:43:14,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:43:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:43:14,416 INFO L87 Difference]: Start difference. First operand 130804 states and 266461 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:15,010 INFO L93 Difference]: Finished difference Result 131011 states and 266828 transitions. [2021-08-21 17:43:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:43:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:43:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:15,393 INFO L225 Difference]: With dead ends: 131011 [2021-08-21 17:43:15,394 INFO L226 Difference]: Without dead ends: 131011 [2021-08-21 17:43:15,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:43:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131011 states. [2021-08-21 17:43:18,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131011 to 130758. [2021-08-21 17:43:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130758 states, 130757 states have (on average 2.0370152267182635) internal successors, (266354), 130757 states have internal predecessors, (266354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130758 states to 130758 states and 266354 transitions. [2021-08-21 17:43:19,128 INFO L78 Accepts]: Start accepts. Automaton has 130758 states and 266354 transitions. Word has length 24 [2021-08-21 17:43:19,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:19,128 INFO L470 AbstractCegarLoop]: Abstraction has 130758 states and 266354 transitions. [2021-08-21 17:43:19,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 130758 states and 266354 transitions. [2021-08-21 17:43:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:19,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:19,183 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:19,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:19,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:19,405 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash -137054611, now seen corresponding path program 234 times [2021-08-21 17:43:19,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:19,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222929256] [2021-08-21 17:43:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:19,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:19,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:19,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222929256] [2021-08-21 17:43:19,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222929256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:19,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375434465] [2021-08-21 17:43:19,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:43:19,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:19,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:19,481 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:19,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 17:43:21,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:43:21,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:21,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:21,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:43:21,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375434465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:21,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:21,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 17:43:21,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689164041] [2021-08-21 17:43:21,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:43:21,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:43:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:43:21,469 INFO L87 Difference]: Start difference. First operand 130758 states and 266354 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:21,981 INFO L93 Difference]: Finished difference Result 130983 states and 266736 transitions. [2021-08-21 17:43:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:43:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 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 17:43:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:22,316 INFO L225 Difference]: With dead ends: 130983 [2021-08-21 17:43:22,317 INFO L226 Difference]: Without dead ends: 130983 [2021-08-21 17:43:22,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:43:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130983 states. [2021-08-21 17:43:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130983 to 130789. [2021-08-21 17:43:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130789 states, 130788 states have (on average 2.0370905587668595) internal successors, (266427), 130788 states have internal predecessors, (266427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130789 states to 130789 states and 266427 transitions. [2021-08-21 17:43:26,264 INFO L78 Accepts]: Start accepts. Automaton has 130789 states and 266427 transitions. Word has length 24 [2021-08-21 17:43:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:26,264 INFO L470 AbstractCegarLoop]: Abstraction has 130789 states and 266427 transitions. [2021-08-21 17:43:26,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 130789 states and 266427 transitions. [2021-08-21 17:43:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:26,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:26,318 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:26,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2021-08-21 17:43:26,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 17:43:26,540 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:26,540 INFO L82 PathProgramCache]: Analyzing trace with hash -434065995, now seen corresponding path program 235 times [2021-08-21 17:43:26,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:26,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48595972] [2021-08-21 17:43:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:26,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:26,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:26,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48595972] [2021-08-21 17:43:26,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48595972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:26,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383422013] [2021-08-21 17:43:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:43:26,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:26,640 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:26,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 17:43:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:28,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 63 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:28,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383422013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:28,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:28,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 17:43:28,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665209038] [2021-08-21 17:43:28,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:43:28,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:43:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:43:28,615 INFO L87 Difference]: Start difference. First operand 130789 states and 266427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:29,298 INFO L93 Difference]: Finished difference Result 131001 states and 266817 transitions. [2021-08-21 17:43:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:43:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 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 17:43:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:29,672 INFO L225 Difference]: With dead ends: 131001 [2021-08-21 17:43:29,673 INFO L226 Difference]: Without dead ends: 130999 [2021-08-21 17:43:29,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:43:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130999 states. [2021-08-21 17:43:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130999 to 130774. [2021-08-21 17:43:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130774 states, 130773 states have (on average 2.036987757411698) internal successors, (266383), 130773 states have internal predecessors, (266383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130774 states to 130774 states and 266383 transitions. [2021-08-21 17:43:34,136 INFO L78 Accepts]: Start accepts. Automaton has 130774 states and 266383 transitions. Word has length 24 [2021-08-21 17:43:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:34,136 INFO L470 AbstractCegarLoop]: Abstraction has 130774 states and 266383 transitions. [2021-08-21 17:43:34,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 130774 states and 266383 transitions. [2021-08-21 17:43:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:34,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:34,295 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:34,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:34,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-21 17:43:34,509 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1252256851, now seen corresponding path program 236 times [2021-08-21 17:43:34,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:34,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649688682] [2021-08-21 17:43:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:34,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:34,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:34,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649688682] [2021-08-21 17:43:34,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649688682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:34,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529825793] [2021-08-21 17:43:34,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:43:34,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:34,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:34,599 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:34,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 17:43:36,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:43:36,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:36,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529825793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:36,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:36,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 17:43:36,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403711756] [2021-08-21 17:43:36,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:43:36,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:43:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:43:36,651 INFO L87 Difference]: Start difference. First operand 130774 states and 266383 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:37,336 INFO L93 Difference]: Finished difference Result 131237 states and 267312 transitions. [2021-08-21 17:43:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:43:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 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 17:43:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:37,720 INFO L225 Difference]: With dead ends: 131237 [2021-08-21 17:43:37,720 INFO L226 Difference]: Without dead ends: 131237 [2021-08-21 17:43:37,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=166, Invalid=254, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:43:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131237 states. [2021-08-21 17:43:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131237 to 131012. [2021-08-21 17:43:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131012 states, 131011 states have (on average 2.0373938066269246) internal successors, (266921), 131011 states have internal predecessors, (266921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131012 states to 131012 states and 266921 transitions. [2021-08-21 17:43:41,267 INFO L78 Accepts]: Start accepts. Automaton has 131012 states and 266921 transitions. Word has length 24 [2021-08-21 17:43:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:41,267 INFO L470 AbstractCegarLoop]: Abstraction has 131012 states and 266921 transitions. [2021-08-21 17:43:41,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 131012 states and 266921 transitions. [2021-08-21 17:43:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:41,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:41,333 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:41,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2021-08-21 17:43:41,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-08-21 17:43:41,921 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 59728373, now seen corresponding path program 237 times [2021-08-21 17:43:41,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:41,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411488763] [2021-08-21 17:43:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:41,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:42,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:42,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411488763] [2021-08-21 17:43:42,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411488763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:42,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332698862] [2021-08-21 17:43:42,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:43:42,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:42,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:42,003 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:42,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 17:43:43,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:43:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:43:43,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332698862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:43,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:43,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 17:43:43,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297092593] [2021-08-21 17:43:43,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:43:43,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:43:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:43:43,863 INFO L87 Difference]: Start difference. First operand 131012 states and 266921 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:44,471 INFO L93 Difference]: Finished difference Result 136259 states and 277997 transitions. [2021-08-21 17:43:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:43:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 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 17:43:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:44,879 INFO L225 Difference]: With dead ends: 136259 [2021-08-21 17:43:44,880 INFO L226 Difference]: Without dead ends: 136259 [2021-08-21 17:43:44,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:43:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136259 states. [2021-08-21 17:43:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136259 to 136007. [2021-08-21 17:43:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136007 states, 136006 states have (on average 2.0408658441539345) internal successors, (277570), 136006 states have internal predecessors, (277570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136007 states to 136007 states and 277570 transitions. [2021-08-21 17:43:48,817 INFO L78 Accepts]: Start accepts. Automaton has 136007 states and 277570 transitions. Word has length 24 [2021-08-21 17:43:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:48,817 INFO L470 AbstractCegarLoop]: Abstraction has 136007 states and 277570 transitions. [2021-08-21 17:43:48,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 136007 states and 277570 transitions. [2021-08-21 17:43:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:48,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:48,879 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:48,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2021-08-21 17:43:49,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:49,100 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 194742957, now seen corresponding path program 238 times [2021-08-21 17:43:49,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:49,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282236513] [2021-08-21 17:43:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:49,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:49,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:49,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282236513] [2021-08-21 17:43:49,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282236513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:49,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074048611] [2021-08-21 17:43:49,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:43:49,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:49,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:49,223 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:49,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 17:43:50,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:43:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:51,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074048611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:51,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:51,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-08-21 17:43:51,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618496020] [2021-08-21 17:43:51,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:43:51,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:43:51,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:43:51,068 INFO L87 Difference]: Start difference. First operand 136007 states and 277570 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:51,833 INFO L93 Difference]: Finished difference Result 136288 states and 278112 transitions. [2021-08-21 17:43:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 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 17:43:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:43:52,237 INFO L225 Difference]: With dead ends: 136288 [2021-08-21 17:43:52,237 INFO L226 Difference]: Without dead ends: 136286 [2021-08-21 17:43:52,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:43:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136286 states. [2021-08-21 17:43:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136286 to 136040. [2021-08-21 17:43:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136040 states, 136039 states have (on average 2.0409294393519506) internal successors, (277646), 136039 states have internal predecessors, (277646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136040 states to 136040 states and 277646 transitions. [2021-08-21 17:43:56,515 INFO L78 Accepts]: Start accepts. Automaton has 136040 states and 277646 transitions. Word has length 24 [2021-08-21 17:43:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:43:56,515 INFO L470 AbstractCegarLoop]: Abstraction has 136040 states and 277646 transitions. [2021-08-21 17:43:56,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 136040 states and 277646 transitions. [2021-08-21 17:43:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:43:56,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:43:56,597 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:43:56,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2021-08-21 17:43:56,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:56,819 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:43:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:43:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1542606201, now seen corresponding path program 239 times [2021-08-21 17:43:56,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:43:56,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312329969] [2021-08-21 17:43:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:43:56,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:43:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:43:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:56,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:43:56,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312329969] [2021-08-21 17:43:56,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312329969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:56,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667531375] [2021-08-21 17:43:56,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:43:56,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:43:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:43:56,937 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:43:56,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 17:43:58,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 17:43:58,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:43:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:43:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:43:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:43:58,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667531375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:43:58,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:43:58,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2021-08-21 17:43:58,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687116024] [2021-08-21 17:43:58,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:43:58,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:43:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:43:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:43:58,986 INFO L87 Difference]: Start difference. First operand 136040 states and 277646 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:43:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:43:59,603 INFO L93 Difference]: Finished difference Result 136533 states and 278639 transitions. [2021-08-21 17:43:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:43:59,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:43:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:00,146 INFO L225 Difference]: With dead ends: 136533 [2021-08-21 17:44:00,146 INFO L226 Difference]: Without dead ends: 136533 [2021-08-21 17:44:00,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:44:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136533 states. [2021-08-21 17:44:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136533 to 136196. [2021-08-21 17:44:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136195 states have (on average 2.041190939461801) internal successors, (278000), 136195 states have internal predecessors, (278000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 278000 transitions. [2021-08-21 17:44:03,535 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 278000 transitions. Word has length 24 [2021-08-21 17:44:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:03,535 INFO L470 AbstractCegarLoop]: Abstraction has 136196 states and 278000 transitions. [2021-08-21 17:44:03,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 278000 transitions. [2021-08-21 17:44:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:44:03,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:03,622 INFO L512 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:03,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:03,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-08-21 17:44:03,837 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1865033581, now seen corresponding path program 240 times [2021-08-21 17:44:03,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:03,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830193898] [2021-08-21 17:44:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:03,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:03,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:03,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830193898] [2021-08-21 17:44:03,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830193898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:03,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755629122] [2021-08-21 17:44:03,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:44:03,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:03,963 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:03,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 17:44:06,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 17:44:06,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:44:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:44:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 66 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:06,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755629122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:06,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:44:06,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 18 [2021-08-21 17:44:06,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189570113] [2021-08-21 17:44:06,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:44:06,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:44:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:44:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:44:06,178 INFO L87 Difference]: Start difference. First operand 136196 states and 278000 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:44:07,069 INFO L93 Difference]: Finished difference Result 148279 states and 302829 transitions. [2021-08-21 17:44:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:44:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:44:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:44:07,504 INFO L225 Difference]: With dead ends: 148279 [2021-08-21 17:44:07,504 INFO L226 Difference]: Without dead ends: 148279 [2021-08-21 17:44:07,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:44:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148279 states. [2021-08-21 17:44:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148279 to 148070. [2021-08-21 17:44:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148070 states, 148069 states have (on average 2.0430407445177585) internal successors, (302511), 148069 states have internal predecessors, (302511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148070 states to 148070 states and 302511 transitions. [2021-08-21 17:44:11,668 INFO L78 Accepts]: Start accepts. Automaton has 148070 states and 302511 transitions. Word has length 24 [2021-08-21 17:44:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:44:11,668 INFO L470 AbstractCegarLoop]: Abstraction has 148070 states and 302511 transitions. [2021-08-21 17:44:11,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:44:11,668 INFO L276 IsEmpty]: Start isEmpty. Operand 148070 states and 302511 transitions. [2021-08-21 17:44:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:44:11,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:44:11,754 INFO L512 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:44:11,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2021-08-21 17:44:11,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-21 17:44:11,969 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:44:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:44:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash -455029786, now seen corresponding path program 241 times [2021-08-21 17:44:11,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:44:11,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588259424] [2021-08-21 17:44:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:44:11,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:44:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:44:12,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:44:12,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588259424] [2021-08-21 17:44:12,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588259424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:44:12,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863137897] [2021-08-21 17:44:12,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:44:12,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:44:12,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:44:12,091 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:44:12,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 17:44:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:44:14,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 17:44:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:44:14,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:44:14,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568