/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/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:32:05,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:32:05,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:32:05,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 17:32:05,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:32:05,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:32:05,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:32:05,936 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 17:32:05,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:32:05,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:32:05,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:32:05,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:32:05,959 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:32:05,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:32:05,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:32:05,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:32:05,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:32:05,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:32:05,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:32:05,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:32:05,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:32:05,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:32:05,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:32:05,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:32:05,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:32:05,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:32:05,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:32:05,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:32:05,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:32:05,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:32:05,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:32:05,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:32:05,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:32:05,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:32:05,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:32:05,963 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:32:05,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:32:05,963 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:32:05,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:32:06,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:32:06,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:32:06,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:32:06,298 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:32:06,299 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:32:06,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-08-21 17:32:06,300 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-08-21 17:32:06,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:32:06,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:32:06,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:32:06,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:32:06,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:32:06,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:32:06,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:32:06,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:32:06,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:32:06,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:32:06,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:32:06,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:32:06,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:32:06,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/1) ... [2021-08-21 17:32:06,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:32:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:06,418 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 17:32:06,438 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 17:32:06,469 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:32:06,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:32:06,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:32:06,470 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:32:06,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:32:06,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:32:06,470 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:32:06,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:32:06,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:32:06,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:32:06,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:32:06,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:32:06,472 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 17:32:06,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:32:06,632 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 17:32:06,634 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:32:06 BoogieIcfgContainer [2021-08-21 17:32:06,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:32:06,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:32:06,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:32:06,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:32:06,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:32:06" (1/2) ... [2021-08-21 17:32:06,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1faabe5 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:32:06, skipping insertion in model container [2021-08-21 17:32:06,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:32:06" (2/2) ... [2021-08-21 17:32:06,641 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-08-21 17:32:06,646 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:32:06,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:32:06,646 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:32:06,646 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:32:06,681 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 17:32:06,717 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:32:06,722 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 17:32:06,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 17:32:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 76 states have (on average 1.7763157894736843) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:32:06,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:06,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:06,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:06,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1182867846, now seen corresponding path program 1 times [2021-08-21 17:32:06,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:06,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204294532] [2021-08-21 17:32:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:06,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:07,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:07,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204294532] [2021-08-21 17:32:07,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204294532] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:32:07,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:32:07,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:32:07,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419372687] [2021-08-21 17:32:07,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:32:07,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:32:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:32:07,175 INFO L87 Difference]: Start difference. First operand has 109 states, 76 states have (on average 1.7763157894736843) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:07,201 INFO L93 Difference]: Finished difference Result 214 states and 266 transitions. [2021-08-21 17:32:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:32:07,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:32:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:07,210 INFO L225 Difference]: With dead ends: 214 [2021-08-21 17:32:07,211 INFO L226 Difference]: Without dead ends: 61 [2021-08-21 17:32:07,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:32:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-21 17:32:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-08-21 17:32:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 71 transitions. [2021-08-21 17:32:07,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 71 transitions. Word has length 15 [2021-08-21 17:32:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:07,242 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 71 transitions. [2021-08-21 17:32:07,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 71 transitions. [2021-08-21 17:32:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:32:07,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:07,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:07,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:32:07,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1202296936, now seen corresponding path program 1 times [2021-08-21 17:32:07,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:07,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970656554] [2021-08-21 17:32:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:07,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:07,357 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 17:32:07,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:07,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970656554] [2021-08-21 17:32:07,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970656554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:07,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174736462] [2021-08-21 17:32:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:07,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:07,366 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 17:32:07,367 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 17:32:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:32:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:07,622 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 17:32:07,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174736462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:07,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:07,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-21 17:32:07,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202886623] [2021-08-21 17:32:07,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:32:07,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:32:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:07,625 INFO L87 Difference]: Start difference. First operand 42 states and 71 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 17:32:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:07,722 INFO L93 Difference]: Finished difference Result 93 states and 153 transitions. [2021-08-21 17:32:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:32:07,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 17:32:07,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:07,725 INFO L225 Difference]: With dead ends: 93 [2021-08-21 17:32:07,725 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 17:32:07,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 17:32:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2021-08-21 17:32:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 104 transitions. [2021-08-21 17:32:07,735 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 104 transitions. Word has length 17 [2021-08-21 17:32:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:07,735 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 104 transitions. [2021-08-21 17:32:07,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 17:32:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 104 transitions. [2021-08-21 17:32:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:32:07,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:07,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:07,765 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 17:32:07,953 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 17:32:07,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash 103176168, now seen corresponding path program 1 times [2021-08-21 17:32:07,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:07,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962322070] [2021-08-21 17:32:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:07,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:08,050 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 17:32:08,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:08,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962322070] [2021-08-21 17:32:08,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962322070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:08,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694202115] [2021-08-21 17:32:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:08,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:08,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:08,056 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 17:32:08,058 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 17:32:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:08,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:32:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:08,286 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 17:32:08,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694202115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:08,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:08,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-21 17:32:08,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779203086] [2021-08-21 17:32:08,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:32:08,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:08,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:32:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:08,307 INFO L87 Difference]: Start difference. First operand 54 states and 104 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 17:32:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:08,428 INFO L93 Difference]: Finished difference Result 93 states and 164 transitions. [2021-08-21 17:32:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:32:08,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 17:32:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:08,433 INFO L225 Difference]: With dead ends: 93 [2021-08-21 17:32:08,433 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 17:32:08,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 17:32:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 45. [2021-08-21 17:32:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 77 transitions. [2021-08-21 17:32:08,452 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 77 transitions. Word has length 17 [2021-08-21 17:32:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:08,453 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 77 transitions. [2021-08-21 17:32:08,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 17:32:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 77 transitions. [2021-08-21 17:32:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:32:08,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:08,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:08,483 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 17:32:08,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-21 17:32:08,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1729584356, now seen corresponding path program 1 times [2021-08-21 17:32:08,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:08,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817156763] [2021-08-21 17:32:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:08,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:08,759 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 17:32:08,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:08,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817156763] [2021-08-21 17:32:08,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817156763] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:32:08,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:32:08,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:32:08,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500379566] [2021-08-21 17:32:08,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:32:08,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:08,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:32:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:32:08,763 INFO L87 Difference]: Start difference. First operand 45 states and 77 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 17:32:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:08,869 INFO L93 Difference]: Finished difference Result 102 states and 169 transitions. [2021-08-21 17:32:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:32:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:32:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:08,872 INFO L225 Difference]: With dead ends: 102 [2021-08-21 17:32:08,872 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 17:32:08,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:32:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 17:32:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 54. [2021-08-21 17:32:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-08-21 17:32:08,888 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 17 [2021-08-21 17:32:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:08,889 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-08-21 17:32:08,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 17:32:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-08-21 17:32:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:32:08,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:08,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:08,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:32:08,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash -992998172, now seen corresponding path program 2 times [2021-08-21 17:32:08,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:08,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464169295] [2021-08-21 17:32:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:08,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:08,963 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 17:32:08,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:08,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464169295] [2021-08-21 17:32:08,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464169295] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:32:08,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:32:08,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:32:08,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629405983] [2021-08-21 17:32:08,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:32:08,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:32:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:32:08,970 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17:32:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:09,025 INFO L93 Difference]: Finished difference Result 75 states and 129 transitions. [2021-08-21 17:32:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:32:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:32:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:09,028 INFO L225 Difference]: With dead ends: 75 [2021-08-21 17:32:09,028 INFO L226 Difference]: Without dead ends: 73 [2021-08-21 17:32:09,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:32:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-21 17:32:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2021-08-21 17:32:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 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 17:32:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 103 transitions. [2021-08-21 17:32:09,038 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 103 transitions. Word has length 17 [2021-08-21 17:32:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:09,038 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 103 transitions. [2021-08-21 17:32:09,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 17:32:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 103 transitions. [2021-08-21 17:32:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:32:09,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:09,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:09,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 17:32:09,039 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:09,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1810474212, now seen corresponding path program 3 times [2021-08-21 17:32:09,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:09,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065415160] [2021-08-21 17:32:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:09,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:09,118 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 17:32:09,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:09,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065415160] [2021-08-21 17:32:09,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065415160] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:32:09,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:32:09,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:32:09,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738697245] [2021-08-21 17:32:09,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:32:09,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:09,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:32:09,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:32:09,120 INFO L87 Difference]: Start difference. First operand 56 states and 103 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 17:32:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:09,198 INFO L93 Difference]: Finished difference Result 77 states and 134 transitions. [2021-08-21 17:32:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:32:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:32:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:09,199 INFO L225 Difference]: With dead ends: 77 [2021-08-21 17:32:09,199 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 17:32:09,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:32:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 17:32:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2021-08-21 17:32:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 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 17:32:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 103 transitions. [2021-08-21 17:32:09,209 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 103 transitions. Word has length 17 [2021-08-21 17:32:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:09,209 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 103 transitions. [2021-08-21 17:32:09,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 17:32:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 103 transitions. [2021-08-21 17:32:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:32:09,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:09,211 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:09,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 17:32:09,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:09,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1073896634, now seen corresponding path program 1 times [2021-08-21 17:32:09,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:09,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199930263] [2021-08-21 17:32:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:09,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:09,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:09,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199930263] [2021-08-21 17:32:09,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199930263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:09,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185233502] [2021-08-21 17:32:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:09,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:09,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:09,293 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 17:32:09,295 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 17:32:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:09,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185233502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:09,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:09,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-21 17:32:09,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744276336] [2021-08-21 17:32:09,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:32:09,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:32:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:32:09,588 INFO L87 Difference]: Start difference. First operand 56 states and 103 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 17:32:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:09,625 INFO L93 Difference]: Finished difference Result 190 states and 321 transitions. [2021-08-21 17:32:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:32:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 19 [2021-08-21 17:32:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:09,627 INFO L225 Difference]: With dead ends: 190 [2021-08-21 17:32:09,627 INFO L226 Difference]: Without dead ends: 180 [2021-08-21 17:32:09,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:32:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-21 17:32:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2021-08-21 17:32:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 203 transitions. [2021-08-21 17:32:09,636 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 203 transitions. Word has length 19 [2021-08-21 17:32:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:09,636 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 203 transitions. [2021-08-21 17:32:09,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 17:32:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 203 transitions. [2021-08-21 17:32:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:32:09,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:09,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:09,668 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 17:32:09,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:09,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1310880774, now seen corresponding path program 2 times [2021-08-21 17:32:09,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:09,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712479789] [2021-08-21 17:32:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:09,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:09,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:09,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712479789] [2021-08-21 17:32:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712479789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:09,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406203845] [2021-08-21 17:32:09,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:09,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:09,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:09,965 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 17:32:09,984 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 17:32:10,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:10,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406203845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:10,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:10,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-21 17:32:10,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541901144] [2021-08-21 17:32:10,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:32:10,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:32:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:32:10,252 INFO L87 Difference]: Start difference. First operand 104 states and 203 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 17:32:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:10,319 INFO L93 Difference]: Finished difference Result 179 states and 318 transitions. [2021-08-21 17:32:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:32:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 19 [2021-08-21 17:32:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:10,321 INFO L225 Difference]: With dead ends: 179 [2021-08-21 17:32:10,321 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 17:32:10,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:32:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 17:32:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 121. [2021-08-21 17:32:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9833333333333334) internal successors, (238), 120 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 238 transitions. [2021-08-21 17:32:10,327 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 238 transitions. Word has length 19 [2021-08-21 17:32:10,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:10,330 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 238 transitions. [2021-08-21 17:32:10,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 17:32:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 238 transitions. [2021-08-21 17:32:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:10,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:10,332 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:10,358 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 17:32:10,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:10,534 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:10,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2020333864, now seen corresponding path program 3 times [2021-08-21 17:32:10,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:10,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251320284] [2021-08-21 17:32:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:10,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:10,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:10,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251320284] [2021-08-21 17:32:10,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251320284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:10,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903921366] [2021-08-21 17:32:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:10,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:10,617 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 17:32:10,648 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 17:32:10,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:32:10,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:32:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:10,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903921366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:10,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:10,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 17:32:10,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539641665] [2021-08-21 17:32:10,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:32:10,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:32:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:10,925 INFO L87 Difference]: Start difference. First operand 121 states and 238 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:11,077 INFO L93 Difference]: Finished difference Result 297 states and 552 transitions. [2021-08-21 17:32:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:32:11,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:11,079 INFO L225 Difference]: With dead ends: 297 [2021-08-21 17:32:11,079 INFO L226 Difference]: Without dead ends: 297 [2021-08-21 17:32:11,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:32:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-21 17:32:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 183. [2021-08-21 17:32:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0494505494505493) internal successors, (373), 182 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 373 transitions. [2021-08-21 17:32:11,086 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 373 transitions. Word has length 21 [2021-08-21 17:32:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:11,086 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 373 transitions. [2021-08-21 17:32:11,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 373 transitions. [2021-08-21 17:32:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:11,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:11,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:11,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:11,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:11,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1967736664, now seen corresponding path program 1 times [2021-08-21 17:32:11,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:11,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560492738] [2021-08-21 17:32:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:11,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:11,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:11,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560492738] [2021-08-21 17:32:11,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560492738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:11,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621705817] [2021-08-21 17:32:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:11,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:11,390 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 17:32:11,406 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 17:32:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:11,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:32:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:11,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621705817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:11,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:11,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:32:11,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199891325] [2021-08-21 17:32:11,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:32:11,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:32:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:11,837 INFO L87 Difference]: Start difference. First operand 183 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:12,117 INFO L93 Difference]: Finished difference Result 422 states and 792 transitions. [2021-08-21 17:32:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:32:12,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:12,121 INFO L225 Difference]: With dead ends: 422 [2021-08-21 17:32:12,121 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 17:32:12,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:32:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 17:32:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 199. [2021-08-21 17:32:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.111111111111111) internal successors, (418), 198 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 418 transitions. [2021-08-21 17:32:12,130 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 418 transitions. Word has length 21 [2021-08-21 17:32:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:12,130 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 418 transitions. [2021-08-21 17:32:12,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 418 transitions. [2021-08-21 17:32:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:12,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:12,132 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:12,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:12,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:12,346 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1937403556, now seen corresponding path program 4 times [2021-08-21 17:32:12,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:12,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090294068] [2021-08-21 17:32:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:12,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:12,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:12,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090294068] [2021-08-21 17:32:12,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090294068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:12,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626376987] [2021-08-21 17:32:12,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:12,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:12,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:12,406 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 17:32:12,408 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 17:32:12,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:12,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:12,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:32:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:12,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626376987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:12,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:12,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:32:12,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529899260] [2021-08-21 17:32:12,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:12,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:12,861 INFO L87 Difference]: Start difference. First operand 199 states and 418 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:13,678 INFO L93 Difference]: Finished difference Result 454 states and 844 transitions. [2021-08-21 17:32:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:32:13,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:32:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:13,681 INFO L225 Difference]: With dead ends: 454 [2021-08-21 17:32:13,681 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 17:32:13,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1000, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:32:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 17:32:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 227. [2021-08-21 17:32:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.088495575221239) internal successors, (472), 226 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 17:32:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 472 transitions. [2021-08-21 17:32:13,689 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 472 transitions. Word has length 21 [2021-08-21 17:32:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:13,689 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 472 transitions. [2021-08-21 17:32:13,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 472 transitions. [2021-08-21 17:32:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:13,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:13,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:13,715 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 17:32:13,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:13,905 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1043001436, now seen corresponding path program 2 times [2021-08-21 17:32:13,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:13,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613389757] [2021-08-21 17:32:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:13,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:13,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:13,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613389757] [2021-08-21 17:32:13,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613389757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:13,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324131975] [2021-08-21 17:32:13,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:13,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:13,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:13,989 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 17:32:14,003 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 17:32:14,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:14,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:32:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:14,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324131975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:14,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:14,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:32:14,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978460673] [2021-08-21 17:32:14,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:32:14,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:32:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:14,460 INFO L87 Difference]: Start difference. First operand 227 states and 472 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:14,967 INFO L93 Difference]: Finished difference Result 976 states and 1936 transitions. [2021-08-21 17:32:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:32:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:14,972 INFO L225 Difference]: With dead ends: 976 [2021-08-21 17:32:14,973 INFO L226 Difference]: Without dead ends: 976 [2021-08-21 17:32:14,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:32:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-21 17:32:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 345. [2021-08-21 17:32:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.2005813953488373) internal successors, (757), 344 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 757 transitions. [2021-08-21 17:32:15,003 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 757 transitions. Word has length 21 [2021-08-21 17:32:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:15,004 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 757 transitions. [2021-08-21 17:32:15,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 757 transitions. [2021-08-21 17:32:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:15,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:15,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:15,031 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 17:32:15,220 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,SelfDestructingSolverStorable11 [2021-08-21 17:32:15,221 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:15,221 INFO L82 PathProgramCache]: Analyzing trace with hash -785178972, now seen corresponding path program 5 times [2021-08-21 17:32:15,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:15,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69641403] [2021-08-21 17:32:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:15,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:15,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:15,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69641403] [2021-08-21 17:32:15,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69641403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:15,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410961814] [2021-08-21 17:32:15,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:15,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:15,279 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 17:32:15,280 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 17:32:15,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:15,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:15,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:32:15,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:15,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410961814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:15,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:15,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:32:15,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646653601] [2021-08-21 17:32:15,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:15,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:15,775 INFO L87 Difference]: Start difference. First operand 345 states and 757 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:16,220 INFO L93 Difference]: Finished difference Result 574 states and 1110 transitions. [2021-08-21 17:32:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:32:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:32:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:16,223 INFO L225 Difference]: With dead ends: 574 [2021-08-21 17:32:16,223 INFO L226 Difference]: Without dead ends: 568 [2021-08-21 17:32:16,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:32:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-21 17:32:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 363. [2021-08-21 17:32:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.179558011049724) internal successors, (789), 362 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 789 transitions. [2021-08-21 17:32:16,235 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 789 transitions. Word has length 21 [2021-08-21 17:32:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:16,236 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 789 transitions. [2021-08-21 17:32:16,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 789 transitions. [2021-08-21 17:32:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:16,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:16,237 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:16,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-21 17:32:16,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 17:32:16,453 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2018293412, now seen corresponding path program 6 times [2021-08-21 17:32:16,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:16,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765819724] [2021-08-21 17:32:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:16,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:16,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:16,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765819724] [2021-08-21 17:32:16,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765819724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:16,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936658344] [2021-08-21 17:32:16,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:16,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:16,509 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 17:32:16,511 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 17:32:16,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:32:16,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:16,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:32:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:16,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936658344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:16,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:16,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:32:16,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280736259] [2021-08-21 17:32:16,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:16,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:16,982 INFO L87 Difference]: Start difference. First operand 363 states and 789 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:17,660 INFO L93 Difference]: Finished difference Result 577 states and 1143 transitions. [2021-08-21 17:32:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:32:17,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:32:17,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:17,663 INFO L225 Difference]: With dead ends: 577 [2021-08-21 17:32:17,663 INFO L226 Difference]: Without dead ends: 577 [2021-08-21 17:32:17,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:32:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-21 17:32:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 337. [2021-08-21 17:32:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.205357142857143) internal successors, (741), 336 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 741 transitions. [2021-08-21 17:32:17,675 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 741 transitions. Word has length 21 [2021-08-21 17:32:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:17,677 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 741 transitions. [2021-08-21 17:32:17,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 741 transitions. [2021-08-21 17:32:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:17,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:17,679 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:17,707 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 17:32:17,892 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,SelfDestructingSolverStorable13 [2021-08-21 17:32:17,893 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1551905116, now seen corresponding path program 7 times [2021-08-21 17:32:17,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:17,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346129649] [2021-08-21 17:32:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:17,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:17,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:17,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346129649] [2021-08-21 17:32:17,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346129649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:17,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237403063] [2021-08-21 17:32:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:17,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:17,961 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 17:32:17,961 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 17:32:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:18,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:32:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:18,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237403063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:18,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:18,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:32:18,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473573132] [2021-08-21 17:32:18,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:18,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:18,423 INFO L87 Difference]: Start difference. First operand 337 states and 741 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:18,728 INFO L93 Difference]: Finished difference Result 484 states and 973 transitions. [2021-08-21 17:32:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:32:18,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:32:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:18,731 INFO L225 Difference]: With dead ends: 484 [2021-08-21 17:32:18,731 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 17:32:18,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:32:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 17:32:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 359. [2021-08-21 17:32:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.189944134078212) internal successors, (784), 358 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 784 transitions. [2021-08-21 17:32:18,744 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 784 transitions. Word has length 21 [2021-08-21 17:32:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:18,745 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 784 transitions. [2021-08-21 17:32:18,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 784 transitions. [2021-08-21 17:32:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:18,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:18,746 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:18,773 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 17:32:18,961 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,SelfDestructingSolverStorable14 [2021-08-21 17:32:18,961 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:18,961 INFO L82 PathProgramCache]: Analyzing trace with hash -359438684, now seen corresponding path program 8 times [2021-08-21 17:32:18,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:18,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000910089] [2021-08-21 17:32:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:18,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:19,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:19,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000910089] [2021-08-21 17:32:19,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000910089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:19,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420148355] [2021-08-21 17:32:19,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:19,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:19,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:19,024 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 17:32:19,025 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 17:32:19,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:19,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:32:19,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:19,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420148355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:19,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:19,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:32:19,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346142919] [2021-08-21 17:32:19,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:19,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:19,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:19,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:19,504 INFO L87 Difference]: Start difference. First operand 359 states and 784 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:19,886 INFO L93 Difference]: Finished difference Result 612 states and 1181 transitions. [2021-08-21 17:32:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:32:19,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:32:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:19,907 INFO L225 Difference]: With dead ends: 612 [2021-08-21 17:32:19,907 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 17:32:19,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:32:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 17:32:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 401. [2021-08-21 17:32:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.185) internal successors, (874), 400 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 874 transitions. [2021-08-21 17:32:19,919 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 874 transitions. Word has length 21 [2021-08-21 17:32:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:19,919 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 874 transitions. [2021-08-21 17:32:19,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 874 transitions. [2021-08-21 17:32:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:19,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:19,920 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:19,948 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 17:32:20,140 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,SelfDestructingSolverStorable15 [2021-08-21 17:32:20,141 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1850933596, now seen corresponding path program 9 times [2021-08-21 17:32:20,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:20,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014396345] [2021-08-21 17:32:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:20,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:20,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:20,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014396345] [2021-08-21 17:32:20,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014396345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:20,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248958935] [2021-08-21 17:32:20,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:20,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:20,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:20,208 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 17:32:20,209 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 17:32:20,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:32:20,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:20,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:32:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:20,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248958935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:20,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:20,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:32:20,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998028682] [2021-08-21 17:32:20,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:20,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:20,717 INFO L87 Difference]: Start difference. First operand 401 states and 874 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:21,400 INFO L93 Difference]: Finished difference Result 631 states and 1224 transitions. [2021-08-21 17:32:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:32:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:32:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:21,403 INFO L225 Difference]: With dead ends: 631 [2021-08-21 17:32:21,403 INFO L226 Difference]: Without dead ends: 631 [2021-08-21 17:32:21,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:32:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-08-21 17:32:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 401. [2021-08-21 17:32:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.185) internal successors, (874), 400 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 874 transitions. [2021-08-21 17:32:21,415 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 874 transitions. Word has length 21 [2021-08-21 17:32:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:21,415 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 874 transitions. [2021-08-21 17:32:21,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 874 transitions. [2021-08-21 17:32:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:21,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:21,416 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:21,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-21 17:32:21,620 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,SelfDestructingSolverStorable16 [2021-08-21 17:32:21,621 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash 545695588, now seen corresponding path program 3 times [2021-08-21 17:32:21,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:21,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608222933] [2021-08-21 17:32:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:21,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:21,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:21,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608222933] [2021-08-21 17:32:21,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608222933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:21,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726025241] [2021-08-21 17:32:21,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:21,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:21,743 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 17:32:21,744 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 17:32:22,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:32:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:32:22,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:22,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726025241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:22,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:22,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-21 17:32:22,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556458859] [2021-08-21 17:32:22,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:22,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:22,325 INFO L87 Difference]: Start difference. First operand 401 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 17:32:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:22,662 INFO L93 Difference]: Finished difference Result 669 states and 1358 transitions. [2021-08-21 17:32:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:32:22,662 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 17:32:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:22,667 INFO L225 Difference]: With dead ends: 669 [2021-08-21 17:32:22,667 INFO L226 Difference]: Without dead ends: 669 [2021-08-21 17:32:22,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:32:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-08-21 17:32:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 414. [2021-08-21 17:32:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.1670702179176757) internal successors, (895), 413 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 895 transitions. [2021-08-21 17:32:22,679 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 895 transitions. Word has length 21 [2021-08-21 17:32:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:22,679 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 895 transitions. [2021-08-21 17:32:22,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 17:32:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 895 transitions. [2021-08-21 17:32:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:22,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:22,680 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:22,714 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 17:32:22,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:22,897 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash 902281256, now seen corresponding path program 1 times [2021-08-21 17:32:22,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:22,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281596529] [2021-08-21 17:32:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:22,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:22,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:22,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281596529] [2021-08-21 17:32:22,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281596529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:22,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473272817] [2021-08-21 17:32:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:22,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:22,948 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 17:32:22,948 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 17:32:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:32:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:23,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473272817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:23,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:23,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 17:32:23,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343139084] [2021-08-21 17:32:23,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:32:23,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:32:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:23,402 INFO L87 Difference]: Start difference. First operand 414 states and 895 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:23,531 INFO L93 Difference]: Finished difference Result 778 states and 1591 transitions. [2021-08-21 17:32:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:32:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:23,535 INFO L225 Difference]: With dead ends: 778 [2021-08-21 17:32:23,535 INFO L226 Difference]: Without dead ends: 778 [2021-08-21 17:32:23,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:32:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-08-21 17:32:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 478. [2021-08-21 17:32:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.19916142557652) internal successors, (1049), 477 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1049 transitions. [2021-08-21 17:32:23,548 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1049 transitions. Word has length 21 [2021-08-21 17:32:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1049 transitions. [2021-08-21 17:32:23,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1049 transitions. [2021-08-21 17:32:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:23,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:23,549 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:23,579 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 17:32:23,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:23,775 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:23,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1169735332, now seen corresponding path program 4 times [2021-08-21 17:32:23,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:23,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747035695] [2021-08-21 17:32:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:23,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:23,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:23,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747035695] [2021-08-21 17:32:23,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747035695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:23,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301406875] [2021-08-21 17:32:23,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:23,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:23,853 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 17:32:23,869 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 17:32:24,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:24,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:32:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:24,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301406875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:24,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:24,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:32:24,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094729663] [2021-08-21 17:32:24,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:32:24,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:32:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:24,393 INFO L87 Difference]: Start difference. First operand 478 states and 1049 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:24,834 INFO L93 Difference]: Finished difference Result 1345 states and 2794 transitions. [2021-08-21 17:32:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:32:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:24,841 INFO L225 Difference]: With dead ends: 1345 [2021-08-21 17:32:24,841 INFO L226 Difference]: Without dead ends: 1345 [2021-08-21 17:32:24,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:32:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-08-21 17:32:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 700. [2021-08-21 17:32:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.2660944206008584) internal successors, (1584), 699 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1584 transitions. [2021-08-21 17:32:24,862 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1584 transitions. Word has length 21 [2021-08-21 17:32:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:24,863 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1584 transitions. [2021-08-21 17:32:24,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1584 transitions. [2021-08-21 17:32:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:24,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:24,865 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:24,895 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 17:32:25,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:25,085 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 853237732, now seen corresponding path program 10 times [2021-08-21 17:32:25,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:25,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589897605] [2021-08-21 17:32:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:25,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:25,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:25,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589897605] [2021-08-21 17:32:25,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589897605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:25,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708731838] [2021-08-21 17:32:25,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:25,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:25,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:25,122 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 17:32:25,123 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 17:32:25,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:25,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:32:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708731838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:25,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:25,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 17:32:25,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805130605] [2021-08-21 17:32:25,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:32:25,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:32:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:32:25,594 INFO L87 Difference]: Start difference. First operand 700 states and 1584 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 17:32:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:25,704 INFO L93 Difference]: Finished difference Result 1051 states and 2242 transitions. [2021-08-21 17:32:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:32:25,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 17:32:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:25,709 INFO L225 Difference]: With dead ends: 1051 [2021-08-21 17:32:25,710 INFO L226 Difference]: Without dead ends: 1051 [2021-08-21 17:32:25,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:32:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-08-21 17:32:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 859. [2021-08-21 17:32:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.2843822843822843) internal successors, (1960), 858 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1960 transitions. [2021-08-21 17:32:25,730 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1960 transitions. Word has length 21 [2021-08-21 17:32:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:25,731 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1960 transitions. [2021-08-21 17:32:25,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 17:32:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1960 transitions. [2021-08-21 17:32:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:25,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:25,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:25,763 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 17:32:25,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:25,959 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1152345760, now seen corresponding path program 5 times [2021-08-21 17:32:25,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:25,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761456505] [2021-08-21 17:32:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:25,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:26,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:26,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761456505] [2021-08-21 17:32:26,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761456505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:26,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782376061] [2021-08-21 17:32:26,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:26,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:26,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:26,025 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 17:32:26,025 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 17:32:26,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:32:26,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:32:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:26,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782376061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:26,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:26,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:32:26,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085512880] [2021-08-21 17:32:26,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:32:26,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:26,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:32:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:26,650 INFO L87 Difference]: Start difference. First operand 859 states and 1960 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:27,171 INFO L93 Difference]: Finished difference Result 1647 states and 3480 transitions. [2021-08-21 17:32:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:32:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:27,180 INFO L225 Difference]: With dead ends: 1647 [2021-08-21 17:32:27,181 INFO L226 Difference]: Without dead ends: 1647 [2021-08-21 17:32:27,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:32:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-08-21 17:32:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 876. [2021-08-21 17:32:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.297142857142857) internal successors, (2010), 875 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2010 transitions. [2021-08-21 17:32:27,211 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2010 transitions. Word has length 21 [2021-08-21 17:32:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:27,212 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 2010 transitions. [2021-08-21 17:32:27,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 17:32:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2010 transitions. [2021-08-21 17:32:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:27,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:27,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:27,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 17:32:27,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:27,437 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1332194972, now seen corresponding path program 6 times [2021-08-21 17:32:27,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:27,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942427804] [2021-08-21 17:32:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:27,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:27,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:27,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942427804] [2021-08-21 17:32:27,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942427804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:27,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92067528] [2021-08-21 17:32:27,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:27,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:27,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:27,482 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 17:32:27,487 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 17:32:27,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:32:27,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:27,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:32:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:28,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92067528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:28,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:28,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 17:32:28,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12473977] [2021-08-21 17:32:28,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:32:28,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:32:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:32:28,096 INFO L87 Difference]: Start difference. First operand 876 states and 2010 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:28,479 INFO L93 Difference]: Finished difference Result 1614 states and 3424 transitions. [2021-08-21 17:32:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:32:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:28,494 INFO L225 Difference]: With dead ends: 1614 [2021-08-21 17:32:28,494 INFO L226 Difference]: Without dead ends: 1614 [2021-08-21 17:32:28,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:32:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-08-21 17:32:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 877. [2021-08-21 17:32:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.2922374429223744) internal successors, (2008), 876 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2008 transitions. [2021-08-21 17:32:28,516 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2008 transitions. Word has length 21 [2021-08-21 17:32:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:28,517 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2008 transitions. [2021-08-21 17:32:28,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 17:32:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2008 transitions. [2021-08-21 17:32:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:32:28,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:28,519 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:28,548 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 17:32:28,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:28,741 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:28,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1439340320, now seen corresponding path program 2 times [2021-08-21 17:32:28,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:28,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598162058] [2021-08-21 17:32:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:28,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:28,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:28,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598162058] [2021-08-21 17:32:28,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598162058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:28,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732465371] [2021-08-21 17:32:28,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:28,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:28,783 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 17:32:28,791 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 17:32:29,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:29,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:32:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:29,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732465371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:29,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:29,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 17:32:29,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917066994] [2021-08-21 17:32:29,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:32:29,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:32:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:32:29,311 INFO L87 Difference]: Start difference. First operand 877 states and 2008 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 17:32:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:29,399 INFO L93 Difference]: Finished difference Result 1460 states and 3147 transitions. [2021-08-21 17:32:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:32:29,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 17:32:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:29,404 INFO L225 Difference]: With dead ends: 1460 [2021-08-21 17:32:29,405 INFO L226 Difference]: Without dead ends: 1460 [2021-08-21 17:32:29,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:32:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-21 17:32:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1000. [2021-08-21 17:32:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 2.3123123123123124) internal successors, (2310), 999 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 2310 transitions. [2021-08-21 17:32:29,430 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 2310 transitions. Word has length 21 [2021-08-21 17:32:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:29,431 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 2310 transitions. [2021-08-21 17:32:29,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 17:32:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 2310 transitions. [2021-08-21 17:32:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:32:29,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:29,433 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:29,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 17:32:29,648 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,SelfDestructingSolverStorable23 [2021-08-21 17:32:29,649 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash -919423994, now seen corresponding path program 11 times [2021-08-21 17:32:29,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:29,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715898648] [2021-08-21 17:32:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:29,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:29,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:29,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715898648] [2021-08-21 17:32:29,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715898648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:29,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536855863] [2021-08-21 17:32:29,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:29,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:29,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:29,728 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 17:32:29,730 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 17:32:30,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:32:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:32:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:30,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536855863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:30,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:30,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-21 17:32:30,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651252231] [2021-08-21 17:32:30,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:32:30,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:30,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:32:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:30,450 INFO L87 Difference]: Start difference. First operand 1000 states and 2310 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:30,530 INFO L93 Difference]: Finished difference Result 1436 states and 3181 transitions. [2021-08-21 17:32:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:32:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 17:32:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:30,536 INFO L225 Difference]: With dead ends: 1436 [2021-08-21 17:32:30,536 INFO L226 Difference]: Without dead ends: 1426 [2021-08-21 17:32:30,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:30,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-08-21 17:32:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1280. [2021-08-21 17:32:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 2.3033620015637215) internal successors, (2946), 1279 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2946 transitions. [2021-08-21 17:32:30,562 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2946 transitions. Word has length 23 [2021-08-21 17:32:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:30,562 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 2946 transitions. [2021-08-21 17:32:30,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2946 transitions. [2021-08-21 17:32:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:32:30,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:30,565 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:30,586 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 17:32:30,773 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,SelfDestructingSolverStorable24 [2021-08-21 17:32:30,773 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash -480157814, now seen corresponding path program 12 times [2021-08-21 17:32:30,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:30,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272150200] [2021-08-21 17:32:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:30,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:32:30,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:30,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272150200] [2021-08-21 17:32:30,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272150200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:30,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673308139] [2021-08-21 17:32:30,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:30,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:30,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:30,861 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 17:32:30,862 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 17:32:31,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:32:31,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:32:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:31,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673308139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:31,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:31,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-21 17:32:31,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781194537] [2021-08-21 17:32:31,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:32:31,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:32:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:31,642 INFO L87 Difference]: Start difference. First operand 1280 states and 2946 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:31,720 INFO L93 Difference]: Finished difference Result 1723 states and 3810 transitions. [2021-08-21 17:32:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:32:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 17:32:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:31,725 INFO L225 Difference]: With dead ends: 1723 [2021-08-21 17:32:31,726 INFO L226 Difference]: Without dead ends: 1711 [2021-08-21 17:32:31,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:32:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-08-21 17:32:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1578. [2021-08-21 17:32:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.2885225110970198) internal successors, (3609), 1577 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 3609 transitions. [2021-08-21 17:32:31,758 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 3609 transitions. Word has length 23 [2021-08-21 17:32:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:31,758 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 3609 transitions. [2021-08-21 17:32:31,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 3609 transitions. [2021-08-21 17:32:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:32:31,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:31,762 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:31,789 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 17:32:31,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 17:32:31,979 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1420753530, now seen corresponding path program 13 times [2021-08-21 17:32:31,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:31,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669403598] [2021-08-21 17:32:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:31,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:32,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:32,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669403598] [2021-08-21 17:32:32,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669403598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:32,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333143840] [2021-08-21 17:32:32,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:32,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:32,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:32,085 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 17:32:32,086 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 17:32:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:32,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:32:32,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:32,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333143840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:32,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:32,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 17:32:32,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237648466] [2021-08-21 17:32:32,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:32:32,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:32:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:32:32,885 INFO L87 Difference]: Start difference. First operand 1578 states and 3609 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:33,011 INFO L93 Difference]: Finished difference Result 1795 states and 3995 transitions. [2021-08-21 17:32:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:32:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 17:32:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:33,016 INFO L225 Difference]: With dead ends: 1795 [2021-08-21 17:32:33,017 INFO L226 Difference]: Without dead ends: 1785 [2021-08-21 17:32:33,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:32:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-21 17:32:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1643. [2021-08-21 17:32:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.2801461632155906) internal successors, (3744), 1642 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 3744 transitions. [2021-08-21 17:32:33,048 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 3744 transitions. Word has length 23 [2021-08-21 17:32:33,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:33,048 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 3744 transitions. [2021-08-21 17:32:33,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 3744 transitions. [2021-08-21 17:32:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:33,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:33,053 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:33,076 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 17:32:33,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:33,268 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1846597400, now seen corresponding path program 14 times [2021-08-21 17:32:33,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:33,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529717644] [2021-08-21 17:32:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:33,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:33,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:33,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529717644] [2021-08-21 17:32:33,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529717644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:33,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529800985] [2021-08-21 17:32:33,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:33,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:33,334 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 17:32:33,334 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 17:32:33,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:33,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:32:33,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:34,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529800985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:34,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:34,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:32:34,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978731269] [2021-08-21 17:32:34,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:32:34,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:34,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:32:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:32:34,012 INFO L87 Difference]: Start difference. First operand 1643 states and 3744 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:34,181 INFO L93 Difference]: Finished difference Result 2355 states and 5199 transitions. [2021-08-21 17:32:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:32:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:34,190 INFO L225 Difference]: With dead ends: 2355 [2021-08-21 17:32:34,190 INFO L226 Difference]: Without dead ends: 2355 [2021-08-21 17:32:34,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:32:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-08-21 17:32:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1750. [2021-08-21 17:32:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 2.262435677530017) internal successors, (3957), 1749 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3957 transitions. [2021-08-21 17:32:34,226 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3957 transitions. Word has length 25 [2021-08-21 17:32:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:34,226 INFO L470 AbstractCegarLoop]: Abstraction has 1750 states and 3957 transitions. [2021-08-21 17:32:34,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3957 transitions. [2021-08-21 17:32:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:34,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:34,231 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:34,274 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 17:32:34,448 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,SelfDestructingSolverStorable27 [2021-08-21 17:32:34,449 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1023420520, now seen corresponding path program 7 times [2021-08-21 17:32:34,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:34,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962966205] [2021-08-21 17:32:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:34,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:34,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:34,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962966205] [2021-08-21 17:32:34,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962966205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:34,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925653947] [2021-08-21 17:32:34,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:34,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:34,507 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 17:32:34,518 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 17:32:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:35,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:32:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:35,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925653947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:35,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:35,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:32:35,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222795929] [2021-08-21 17:32:35,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:32:35,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:32:35,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:32:35,383 INFO L87 Difference]: Start difference. First operand 1750 states and 3957 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:35,877 INFO L93 Difference]: Finished difference Result 2792 states and 6015 transitions. [2021-08-21 17:32:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:32:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:35,884 INFO L225 Difference]: With dead ends: 2792 [2021-08-21 17:32:35,884 INFO L226 Difference]: Without dead ends: 2792 [2021-08-21 17:32:35,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:32:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-08-21 17:32:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1833. [2021-08-21 17:32:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 2.2685589519650655) internal successors, (4156), 1832 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 4156 transitions. [2021-08-21 17:32:35,927 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 4156 transitions. Word has length 25 [2021-08-21 17:32:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:35,927 INFO L470 AbstractCegarLoop]: Abstraction has 1833 states and 4156 transitions. [2021-08-21 17:32:35,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 4156 transitions. [2021-08-21 17:32:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:35,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:35,933 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:35,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 17:32:36,148 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,SelfDestructingSolverStorable28 [2021-08-21 17:32:36,149 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash 61755236, now seen corresponding path program 15 times [2021-08-21 17:32:36,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:36,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965500161] [2021-08-21 17:32:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:36,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:36,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965500161] [2021-08-21 17:32:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965500161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757908178] [2021-08-21 17:32:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:36,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:36,208 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 17:32:36,209 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 17:32:36,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:32:36,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:37,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757908178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:37,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:37,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:32:37,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967611834] [2021-08-21 17:32:37,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:32:37,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:37,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:32:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:32:37,066 INFO L87 Difference]: Start difference. First operand 1833 states and 4156 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:38,287 INFO L93 Difference]: Finished difference Result 3082 states and 6641 transitions. [2021-08-21 17:32:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 17:32:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:38,294 INFO L225 Difference]: With dead ends: 3082 [2021-08-21 17:32:38,294 INFO L226 Difference]: Without dead ends: 3082 [2021-08-21 17:32:38,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=1002, Invalid=2658, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:32:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-08-21 17:32:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2179. [2021-08-21 17:32:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.286501377410468) internal successors, (4980), 2178 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 4980 transitions. [2021-08-21 17:32:38,345 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 4980 transitions. Word has length 25 [2021-08-21 17:32:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:38,346 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 4980 transitions. [2021-08-21 17:32:38,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 4980 transitions. [2021-08-21 17:32:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:38,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:38,351 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:38,383 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 17:32:38,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:38,565 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1376317540, now seen corresponding path program 8 times [2021-08-21 17:32:38,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:38,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278871572] [2021-08-21 17:32:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:38,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:38,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278871572] [2021-08-21 17:32:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278871572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142716196] [2021-08-21 17:32:38,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:38,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:38,628 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 17:32:38,640 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 17:32:39,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:39,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:32:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:39,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142716196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:39,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:39,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:32:39,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775249915] [2021-08-21 17:32:39,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:32:39,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:32:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:32:39,582 INFO L87 Difference]: Start difference. First operand 2179 states and 4980 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:40,581 INFO L93 Difference]: Finished difference Result 6158 states and 13306 transitions. [2021-08-21 17:32:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 17:32:40,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:40,600 INFO L225 Difference]: With dead ends: 6158 [2021-08-21 17:32:40,601 INFO L226 Difference]: Without dead ends: 6158 [2021-08-21 17:32:40,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=651, Invalid=2319, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:32:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2021-08-21 17:32:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 2596. [2021-08-21 17:32:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2595 states have (on average 2.2940269749518305) internal successors, (5953), 2595 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 5953 transitions. [2021-08-21 17:32:40,683 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 5953 transitions. Word has length 25 [2021-08-21 17:32:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:40,683 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 5953 transitions. [2021-08-21 17:32:40,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 5953 transitions. [2021-08-21 17:32:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:40,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:40,689 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:40,719 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 17:32:40,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:40,913 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1634140004, now seen corresponding path program 16 times [2021-08-21 17:32:40,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:40,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712003799] [2021-08-21 17:32:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:40,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:40,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:40,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712003799] [2021-08-21 17:32:40,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712003799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:40,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23410832] [2021-08-21 17:32:40,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:40,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:40,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:40,988 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 17:32:40,990 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 17:32:41,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:41,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:41,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:41,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23410832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:41,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:41,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:32:41,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630729510] [2021-08-21 17:32:41,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:32:41,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:32:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:32:41,911 INFO L87 Difference]: Start difference. First operand 2596 states and 5953 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:42,649 INFO L93 Difference]: Finished difference Result 3534 states and 7618 transitions. [2021-08-21 17:32:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:32:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:42,661 INFO L225 Difference]: With dead ends: 3534 [2021-08-21 17:32:42,661 INFO L226 Difference]: Without dead ends: 3528 [2021-08-21 17:32:42,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:32:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-08-21 17:32:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2638. [2021-08-21 17:32:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.291998483124763) internal successors, (6044), 2637 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 6044 transitions. [2021-08-21 17:32:42,722 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 6044 transitions. Word has length 25 [2021-08-21 17:32:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:42,722 INFO L470 AbstractCegarLoop]: Abstraction has 2638 states and 6044 transitions. [2021-08-21 17:32:42,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 6044 transitions. [2021-08-21 17:32:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:42,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:42,727 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:42,754 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 17:32:42,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:42,941 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash 142645092, now seen corresponding path program 17 times [2021-08-21 17:32:42,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:42,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839313417] [2021-08-21 17:32:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:42,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:43,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:43,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839313417] [2021-08-21 17:32:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839313417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:43,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537583461] [2021-08-21 17:32:43,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:43,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:43,006 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 17:32:43,032 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 17:32:43,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:32:43,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:43,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:43,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:43,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537583461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:43,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:43,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:32:43,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031134332] [2021-08-21 17:32:43,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:32:43,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:32:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:32:43,977 INFO L87 Difference]: Start difference. First operand 2638 states and 6044 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:45,234 INFO L93 Difference]: Finished difference Result 3574 states and 7702 transitions. [2021-08-21 17:32:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 17:32:45,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:45,240 INFO L225 Difference]: With dead ends: 3574 [2021-08-21 17:32:45,240 INFO L226 Difference]: Without dead ends: 3574 [2021-08-21 17:32:45,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 985.8ms TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 17:32:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2021-08-21 17:32:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 2473. [2021-08-21 17:32:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 2.2851941747572817) internal successors, (5649), 2472 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 5649 transitions. [2021-08-21 17:32:45,299 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 5649 transitions. Word has length 25 [2021-08-21 17:32:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:45,300 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 5649 transitions. [2021-08-21 17:32:45,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 5649 transitions. [2021-08-21 17:32:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:45,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:45,307 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:45,340 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 17:32:45,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:45,521 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 867413860, now seen corresponding path program 18 times [2021-08-21 17:32:45,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:45,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134659732] [2021-08-21 17:32:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:45,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:45,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:45,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134659732] [2021-08-21 17:32:45,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134659732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:45,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334603786] [2021-08-21 17:32:45,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:45,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:45,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:45,586 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 17:32:45,586 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 17:32:46,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:32:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:46,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334603786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:46,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:46,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:32:46,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478865871] [2021-08-21 17:32:46,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:32:46,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:32:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:32:46,570 INFO L87 Difference]: Start difference. First operand 2473 states and 5649 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:47,239 INFO L93 Difference]: Finished difference Result 4198 states and 9107 transitions. [2021-08-21 17:32:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:32:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:47,248 INFO L225 Difference]: With dead ends: 4198 [2021-08-21 17:32:47,248 INFO L226 Difference]: Without dead ends: 4180 [2021-08-21 17:32:47,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 575.8ms TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:32:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2021-08-21 17:32:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 3042. [2021-08-21 17:32:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3041 states have (on average 2.299572509043078) internal successors, (6993), 3041 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 6993 transitions. [2021-08-21 17:32:47,322 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 6993 transitions. Word has length 25 [2021-08-21 17:32:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:47,323 INFO L470 AbstractCegarLoop]: Abstraction has 3042 states and 6993 transitions. [2021-08-21 17:32:47,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 6993 transitions. [2021-08-21 17:32:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:47,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:47,331 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:47,363 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 17:32:47,544 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,SelfDestructingSolverStorable33 [2021-08-21 17:32:47,545 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2059880292, now seen corresponding path program 19 times [2021-08-21 17:32:47,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:47,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727740636] [2021-08-21 17:32:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:47,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:47,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:47,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727740636] [2021-08-21 17:32:47,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727740636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:47,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910900787] [2021-08-21 17:32:47,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:32:47,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:47,604 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 17:32:47,605 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 17:32:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:48,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:48,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910900787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:48,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:48,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:32:48,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600902367] [2021-08-21 17:32:48,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:32:48,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:32:48,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:32:48,586 INFO L87 Difference]: Start difference. First operand 3042 states and 6993 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:49,377 INFO L93 Difference]: Finished difference Result 4418 states and 9487 transitions. [2021-08-21 17:32:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:32:49,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:49,386 INFO L225 Difference]: With dead ends: 4418 [2021-08-21 17:32:49,386 INFO L226 Difference]: Without dead ends: 4406 [2021-08-21 17:32:49,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=477, Invalid=1503, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:32:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2021-08-21 17:32:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 3332. [2021-08-21 17:32:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.290003002101471) internal successors, (7628), 3331 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 7628 transitions. [2021-08-21 17:32:49,468 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 7628 transitions. Word has length 25 [2021-08-21 17:32:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:49,468 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 7628 transitions. [2021-08-21 17:32:49,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 7628 transitions. [2021-08-21 17:32:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:49,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:49,477 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:49,503 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 17:32:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:49,691 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash 568385380, now seen corresponding path program 20 times [2021-08-21 17:32:49,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:49,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270887284] [2021-08-21 17:32:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:49,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:49,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:49,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270887284] [2021-08-21 17:32:49,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270887284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:49,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776231162] [2021-08-21 17:32:49,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:32:49,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:49,751 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 17:32:49,751 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 17:32:50,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:32:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:50,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776231162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:50,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:50,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:32:50,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56820591] [2021-08-21 17:32:50,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:32:50,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:32:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:32:50,729 INFO L87 Difference]: Start difference. First operand 3332 states and 7628 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:52,094 INFO L93 Difference]: Finished difference Result 4437 states and 9528 transitions. [2021-08-21 17:32:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 17:32:52,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:52,101 INFO L225 Difference]: With dead ends: 4437 [2021-08-21 17:32:52,101 INFO L226 Difference]: Without dead ends: 4437 [2021-08-21 17:32:52,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1081.4ms TimeCoverageRelationStatistics Valid=1040, Invalid=2866, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 17:32:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2021-08-21 17:32:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 3174. [2021-08-21 17:32:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 3173 states have (on average 2.300346675070911) internal successors, (7299), 3173 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 7299 transitions. [2021-08-21 17:32:52,191 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 7299 transitions. Word has length 25 [2021-08-21 17:32:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:52,191 INFO L470 AbstractCegarLoop]: Abstraction has 3174 states and 7299 transitions. [2021-08-21 17:32:52,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 7299 transitions. [2021-08-21 17:32:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:52,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:52,199 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:52,226 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 17:32:52,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:52,421 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1517002908, now seen corresponding path program 21 times [2021-08-21 17:32:52,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:52,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642438797] [2021-08-21 17:32:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:52,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:52,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:52,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642438797] [2021-08-21 17:32:52,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642438797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:52,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092995430] [2021-08-21 17:32:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:32:52,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:52,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:52,488 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 17:32:52,489 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 17:32:53,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:32:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:53,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092995430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:53,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:53,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:32:53,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962532050] [2021-08-21 17:32:53,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:32:53,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:32:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:32:53,517 INFO L87 Difference]: Start difference. First operand 3174 states and 7299 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:54,083 INFO L93 Difference]: Finished difference Result 4688 states and 10241 transitions. [2021-08-21 17:32:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:32:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:54,090 INFO L225 Difference]: With dead ends: 4688 [2021-08-21 17:32:54,090 INFO L226 Difference]: Without dead ends: 4668 [2021-08-21 17:32:54,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:32:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-08-21 17:32:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 3658. [2021-08-21 17:32:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3657 states have (on average 2.3035274815422477) internal successors, (8424), 3657 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 8424 transitions. [2021-08-21 17:32:54,153 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 8424 transitions. Word has length 25 [2021-08-21 17:32:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:54,153 INFO L470 AbstractCegarLoop]: Abstraction has 3658 states and 8424 transitions. [2021-08-21 17:32:54,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 8424 transitions. [2021-08-21 17:32:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:54,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:54,163 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:54,193 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 17:32:54,389 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,SelfDestructingSolverStorable36 [2021-08-21 17:32:54,389 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1981937508, now seen corresponding path program 22 times [2021-08-21 17:32:54,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:54,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050503867] [2021-08-21 17:32:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:54,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:54,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:54,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050503867] [2021-08-21 17:32:54,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050503867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:54,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258507841] [2021-08-21 17:32:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:32:54,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:54,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:54,450 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 17:32:54,479 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 17:32:55,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:32:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:55,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258507841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:55,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:55,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:32:55,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514641219] [2021-08-21 17:32:55,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:32:55,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:32:55,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:32:55,511 INFO L87 Difference]: Start difference. First operand 3658 states and 8424 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:56,293 INFO L93 Difference]: Finished difference Result 4752 states and 10314 transitions. [2021-08-21 17:32:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:32:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:56,303 INFO L225 Difference]: With dead ends: 4752 [2021-08-21 17:32:56,303 INFO L226 Difference]: Without dead ends: 4722 [2021-08-21 17:32:56,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:32:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2021-08-21 17:32:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 3852. [2021-08-21 17:32:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 2.299922098156323) internal successors, (8857), 3851 states have internal predecessors, (8857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 8857 transitions. [2021-08-21 17:32:56,382 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 8857 transitions. Word has length 25 [2021-08-21 17:32:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:56,382 INFO L470 AbstractCegarLoop]: Abstraction has 3852 states and 8857 transitions. [2021-08-21 17:32:56,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 8857 transitions. [2021-08-21 17:32:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:56,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:56,391 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:56,418 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 17:32:56,615 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,SelfDestructingSolverStorable37 [2021-08-21 17:32:56,616 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:56,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:56,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1120563356, now seen corresponding path program 23 times [2021-08-21 17:32:56,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:56,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578028144] [2021-08-21 17:32:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:56,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:56,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:56,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578028144] [2021-08-21 17:32:56,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578028144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:56,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124872734] [2021-08-21 17:32:56,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:32:56,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:56,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:56,679 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 17:32:56,680 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 17:32:57,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:32:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:57,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:32:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:57,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124872734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:57,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:32:57,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:32:57,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376539361] [2021-08-21 17:32:57,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:32:57,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:32:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:32:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:32:57,751 INFO L87 Difference]: Start difference. First operand 3852 states and 8857 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:32:58,669 INFO L93 Difference]: Finished difference Result 5175 states and 11104 transitions. [2021-08-21 17:32:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:32:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:32:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:32:58,677 INFO L225 Difference]: With dead ends: 5175 [2021-08-21 17:32:58,677 INFO L226 Difference]: Without dead ends: 5163 [2021-08-21 17:32:58,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 718.7ms TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:32:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2021-08-21 17:32:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 4178. [2021-08-21 17:32:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.273401963131434) internal successors, (9496), 4177 states have internal predecessors, (9496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 9496 transitions. [2021-08-21 17:32:58,747 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 9496 transitions. Word has length 25 [2021-08-21 17:32:58,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:32:58,747 INFO L470 AbstractCegarLoop]: Abstraction has 4178 states and 9496 transitions. [2021-08-21 17:32:58,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:32:58,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 9496 transitions. [2021-08-21 17:32:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:32:58,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:32:58,754 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:32:58,773 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 17:32:58,956 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,SelfDestructingSolverStorable38 [2021-08-21 17:32:58,956 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:32:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:32:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1682909028, now seen corresponding path program 24 times [2021-08-21 17:32:58,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:32:58,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168649463] [2021-08-21 17:32:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:32:58,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:32:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:32:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:32:59,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:32:59,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168649463] [2021-08-21 17:32:59,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168649463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:32:59,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774470382] [2021-08-21 17:32:59,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:32:59,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:32:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:32:59,016 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 17:32:59,017 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 17:32:59,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:32:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:32:59,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:32:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774470382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:00,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:33:00,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908834648] [2021-08-21 17:33:00,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:33:00,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:33:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:33:00,090 INFO L87 Difference]: Start difference. First operand 4178 states and 9496 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:01,379 INFO L93 Difference]: Finished difference Result 5118 states and 11027 transitions. [2021-08-21 17:33:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 17:33:01,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:01,387 INFO L225 Difference]: With dead ends: 5118 [2021-08-21 17:33:01,387 INFO L226 Difference]: Without dead ends: 5118 [2021-08-21 17:33:01,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=1133, Invalid=3027, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 17:33:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-08-21 17:33:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4066. [2021-08-21 17:33:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 4065 states have (on average 2.278966789667897) internal successors, (9264), 4065 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 9264 transitions. [2021-08-21 17:33:01,452 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 9264 transitions. Word has length 25 [2021-08-21 17:33:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:01,452 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 9264 transitions. [2021-08-21 17:33:01,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 9264 transitions. [2021-08-21 17:33:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:01,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:01,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:01,483 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 17:33:01,672 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,SelfDestructingSolverStorable39 [2021-08-21 17:33:01,672 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:01,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1634772956, now seen corresponding path program 9 times [2021-08-21 17:33:01,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:01,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503094701] [2021-08-21 17:33:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:01,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:01,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:01,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503094701] [2021-08-21 17:33:01,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503094701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:01,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441314448] [2021-08-21 17:33:01,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:01,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:01,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:01,734 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 17:33:01,739 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 17:33:02,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:33:02,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:02,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441314448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:02,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:02,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:02,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858604242] [2021-08-21 17:33:02,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:02,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:02,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:02,867 INFO L87 Difference]: Start difference. First operand 4066 states and 9264 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:03,262 INFO L93 Difference]: Finished difference Result 5785 states and 12816 transitions. [2021-08-21 17:33:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:33:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:03,270 INFO L225 Difference]: With dead ends: 5785 [2021-08-21 17:33:03,270 INFO L226 Difference]: Without dead ends: 5773 [2021-08-21 17:33:03,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:33:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5773 states. [2021-08-21 17:33:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5773 to 4154. [2021-08-21 17:33:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4153 states have (on average 2.27401878160366) internal successors, (9444), 4153 states have internal predecessors, (9444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 9444 transitions. [2021-08-21 17:33:03,363 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 9444 transitions. Word has length 25 [2021-08-21 17:33:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:03,363 INFO L470 AbstractCegarLoop]: Abstraction has 4154 states and 9444 transitions. [2021-08-21 17:33:03,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 9444 transitions. [2021-08-21 17:33:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:03,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:03,370 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:03,389 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 17:33:03,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:03,571 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:03,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1741637608, now seen corresponding path program 10 times [2021-08-21 17:33:03,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:03,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628257484] [2021-08-21 17:33:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:03,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:03,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:03,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628257484] [2021-08-21 17:33:03,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628257484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:03,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86382714] [2021-08-21 17:33:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:03,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:03,660 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 17:33:03,663 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 17:33:04,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:04,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:04,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:04,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:04,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86382714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:04,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:04,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-21 17:33:04,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830428901] [2021-08-21 17:33:04,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:04,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:04,820 INFO L87 Difference]: Start difference. First operand 4154 states and 9444 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:05,503 INFO L93 Difference]: Finished difference Result 6013 states and 13090 transitions. [2021-08-21 17:33:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:33:05,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:05,514 INFO L225 Difference]: With dead ends: 6013 [2021-08-21 17:33:05,514 INFO L226 Difference]: Without dead ends: 5997 [2021-08-21 17:33:05,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:33:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5997 states. [2021-08-21 17:33:05,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5997 to 4271. [2021-08-21 17:33:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 2.2740046838407495) internal successors, (9710), 4270 states have internal predecessors, (9710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 9710 transitions. [2021-08-21 17:33:05,585 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 9710 transitions. Word has length 25 [2021-08-21 17:33:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:05,585 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 9710 transitions. [2021-08-21 17:33:05,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 9710 transitions. [2021-08-21 17:33:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:05,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:05,592 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:05,610 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 17:33:05,793 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,SelfDestructingSolverStorable41 [2021-08-21 17:33:05,793 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1066966884, now seen corresponding path program 11 times [2021-08-21 17:33:05,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:05,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514634430] [2021-08-21 17:33:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:05,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:05,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:05,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514634430] [2021-08-21 17:33:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514634430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:05,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219923965] [2021-08-21 17:33:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:05,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:05,858 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 17:33:05,859 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 17:33:06,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:33:06,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:07,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219923965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:07,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:07,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:07,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431083995] [2021-08-21 17:33:07,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:07,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:07,064 INFO L87 Difference]: Start difference. First operand 4271 states and 9710 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:08,315 INFO L93 Difference]: Finished difference Result 9393 states and 20335 transitions. [2021-08-21 17:33:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 17:33:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:08,332 INFO L225 Difference]: With dead ends: 9393 [2021-08-21 17:33:08,332 INFO L226 Difference]: Without dead ends: 9369 [2021-08-21 17:33:08,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 916.6ms TimeCoverageRelationStatistics Valid=755, Invalid=2785, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:33:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-08-21 17:33:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 5107. [2021-08-21 17:33:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5107 states, 5106 states have (on average 2.293184488836663) internal successors, (11709), 5106 states have internal predecessors, (11709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5107 states to 5107 states and 11709 transitions. [2021-08-21 17:33:08,455 INFO L78 Accepts]: Start accepts. Automaton has 5107 states and 11709 transitions. Word has length 25 [2021-08-21 17:33:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:08,455 INFO L470 AbstractCegarLoop]: Abstraction has 5107 states and 11709 transitions. [2021-08-21 17:33:08,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 5107 states and 11709 transitions. [2021-08-21 17:33:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:08,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:08,464 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:08,483 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 17:33:08,664 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,SelfDestructingSolverStorable42 [2021-08-21 17:33:08,664 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1437253476, now seen corresponding path program 12 times [2021-08-21 17:33:08,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:08,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663861273] [2021-08-21 17:33:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:08,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:08,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:08,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663861273] [2021-08-21 17:33:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663861273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:08,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365749248] [2021-08-21 17:33:08,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:08,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:08,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:08,722 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 17:33:08,723 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 17:33:09,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:09,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:09,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365749248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:09,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:09,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:09,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099688639] [2021-08-21 17:33:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:09,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:09,932 INFO L87 Difference]: Start difference. First operand 5107 states and 11709 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:11,097 INFO L93 Difference]: Finished difference Result 11774 states and 25577 transitions. [2021-08-21 17:33:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 17:33:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:11,120 INFO L225 Difference]: With dead ends: 11774 [2021-08-21 17:33:11,120 INFO L226 Difference]: Without dead ends: 11774 [2021-08-21 17:33:11,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 844.0ms TimeCoverageRelationStatistics Valid=704, Invalid=2266, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:33:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11774 states. [2021-08-21 17:33:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11774 to 5909. [2021-08-21 17:33:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5909 states, 5908 states have (on average 2.29062288422478) internal successors, (13533), 5908 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5909 states to 5909 states and 13533 transitions. [2021-08-21 17:33:11,283 INFO L78 Accepts]: Start accepts. Automaton has 5909 states and 13533 transitions. Word has length 25 [2021-08-21 17:33:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:11,283 INFO L470 AbstractCegarLoop]: Abstraction has 5909 states and 13533 transitions. [2021-08-21 17:33:11,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5909 states and 13533 transitions. [2021-08-21 17:33:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:11,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:11,292 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:11,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 17:33:11,493 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,SelfDestructingSolverStorable43 [2021-08-21 17:33:11,493 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1947040360, now seen corresponding path program 25 times [2021-08-21 17:33:11,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:11,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024098736] [2021-08-21 17:33:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:11,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:11,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:11,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024098736] [2021-08-21 17:33:11,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024098736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:11,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630892921] [2021-08-21 17:33:11,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:11,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:11,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:11,542 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 17:33:11,543 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 17:33:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:33:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:12,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630892921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:12,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:12,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:33:12,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22783466] [2021-08-21 17:33:12,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:33:12,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:33:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:33:12,636 INFO L87 Difference]: Start difference. First operand 5909 states and 13533 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:12,767 INFO L93 Difference]: Finished difference Result 9608 states and 21241 transitions. [2021-08-21 17:33:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:33:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:12,785 INFO L225 Difference]: With dead ends: 9608 [2021-08-21 17:33:12,785 INFO L226 Difference]: Without dead ends: 9608 [2021-08-21 17:33:12,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:33:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-08-21 17:33:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 6764. [2021-08-21 17:33:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6764 states, 6763 states have (on average 2.2927694809995565) internal successors, (15506), 6763 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 15506 transitions. [2021-08-21 17:33:12,943 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 15506 transitions. Word has length 25 [2021-08-21 17:33:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:12,944 INFO L470 AbstractCegarLoop]: Abstraction has 6764 states and 15506 transitions. [2021-08-21 17:33:12,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 15506 transitions. [2021-08-21 17:33:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:12,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:12,954 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:12,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 17:33:13,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:13,154 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2018936736, now seen corresponding path program 13 times [2021-08-21 17:33:13,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:13,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930559455] [2021-08-21 17:33:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:13,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:13,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:13,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930559455] [2021-08-21 17:33:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930559455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:13,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307349757] [2021-08-21 17:33:13,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:13,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:13,229 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 17:33:13,230 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 17:33:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:14,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:14,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:14,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307349757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:14,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:14,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:14,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682516715] [2021-08-21 17:33:14,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:14,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:14,509 INFO L87 Difference]: Start difference. First operand 6764 states and 15506 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:16,207 INFO L93 Difference]: Finished difference Result 20583 states and 45324 transitions. [2021-08-21 17:33:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 17:33:16,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:16,253 INFO L225 Difference]: With dead ends: 20583 [2021-08-21 17:33:16,253 INFO L226 Difference]: Without dead ends: 20581 [2021-08-21 17:33:16,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1307.9ms TimeCoverageRelationStatistics Valid=1337, Invalid=4213, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 17:33:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20581 states. [2021-08-21 17:33:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20581 to 9100. [2021-08-21 17:33:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 2.3526761182547533) internal successors, (21407), 9099 states have internal predecessors, (21407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 21407 transitions. [2021-08-21 17:33:16,545 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 21407 transitions. Word has length 25 [2021-08-21 17:33:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:16,545 INFO L470 AbstractCegarLoop]: Abstraction has 9100 states and 21407 transitions. [2021-08-21 17:33:16,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 21407 transitions. [2021-08-21 17:33:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:16,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:16,557 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:16,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 17:33:16,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:16,758 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1639159904, now seen corresponding path program 14 times [2021-08-21 17:33:16,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:16,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160806036] [2021-08-21 17:33:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:16,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:16,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:16,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160806036] [2021-08-21 17:33:16,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160806036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:16,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570582628] [2021-08-21 17:33:16,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:16,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:16,821 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 17:33:16,821 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 17:33:17,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:17,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:17,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:18,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570582628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:18,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:18,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:18,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043148610] [2021-08-21 17:33:18,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:18,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:18,119 INFO L87 Difference]: Start difference. First operand 9100 states and 21407 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:19,534 INFO L93 Difference]: Finished difference Result 20484 states and 45626 transitions. [2021-08-21 17:33:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 17:33:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:19,581 INFO L225 Difference]: With dead ends: 20484 [2021-08-21 17:33:19,581 INFO L226 Difference]: Without dead ends: 20484 [2021-08-21 17:33:19,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1096.2ms TimeCoverageRelationStatistics Valid=1157, Invalid=3265, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 17:33:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20484 states. [2021-08-21 17:33:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20484 to 9655. [2021-08-21 17:33:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9655 states, 9654 states have (on average 2.3644085353221462) internal successors, (22826), 9654 states have internal predecessors, (22826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9655 states to 9655 states and 22826 transitions. [2021-08-21 17:33:19,877 INFO L78 Accepts]: Start accepts. Automaton has 9655 states and 22826 transitions. Word has length 25 [2021-08-21 17:33:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:19,877 INFO L470 AbstractCegarLoop]: Abstraction has 9655 states and 22826 transitions. [2021-08-21 17:33:19,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9655 states and 22826 transitions. [2021-08-21 17:33:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:19,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:19,891 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:19,910 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 17:33:20,091 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,SelfDestructingSolverStorable46 [2021-08-21 17:33:20,092 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash -845380828, now seen corresponding path program 15 times [2021-08-21 17:33:20,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:20,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647205719] [2021-08-21 17:33:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:20,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:20,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:20,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647205719] [2021-08-21 17:33:20,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647205719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:20,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212680036] [2021-08-21 17:33:20,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:20,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:20,152 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 17:33:20,153 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 17:33:21,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:33:21,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:21,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212680036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:21,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:21,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:21,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814238529] [2021-08-21 17:33:21,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:21,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:21,534 INFO L87 Difference]: Start difference. First operand 9655 states and 22826 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:23,068 INFO L93 Difference]: Finished difference Result 21725 states and 48466 transitions. [2021-08-21 17:33:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 17:33:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:23,112 INFO L225 Difference]: With dead ends: 21725 [2021-08-21 17:33:23,112 INFO L226 Difference]: Without dead ends: 21725 [2021-08-21 17:33:23,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 1146.2ms TimeCoverageRelationStatistics Valid=1289, Invalid=3823, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 17:33:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21725 states. [2021-08-21 17:33:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21725 to 9952. [2021-08-21 17:33:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9952 states, 9951 states have (on average 2.3776504873882023) internal successors, (23660), 9951 states have internal predecessors, (23660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 23660 transitions. [2021-08-21 17:33:23,435 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 23660 transitions. Word has length 25 [2021-08-21 17:33:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:23,435 INFO L470 AbstractCegarLoop]: Abstraction has 9952 states and 23660 transitions. [2021-08-21 17:33:23,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 23660 transitions. [2021-08-21 17:33:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:23,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:23,452 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:23,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 17:33:23,663 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,SelfDestructingSolverStorable47 [2021-08-21 17:33:23,664 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:23,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1926154464, now seen corresponding path program 16 times [2021-08-21 17:33:23,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:23,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244662922] [2021-08-21 17:33:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:23,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:23,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:23,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244662922] [2021-08-21 17:33:23,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244662922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:23,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272987990] [2021-08-21 17:33:23,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:23,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:23,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:23,746 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 17:33:23,769 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 17:33:24,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:24,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:24,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:25,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272987990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:25,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:25,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:25,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111507029] [2021-08-21 17:33:25,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:25,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:25,171 INFO L87 Difference]: Start difference. First operand 9952 states and 23660 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:25,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:25,909 INFO L93 Difference]: Finished difference Result 24907 states and 56025 transitions. [2021-08-21 17:33:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:33:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:25,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:25,971 INFO L225 Difference]: With dead ends: 24907 [2021-08-21 17:33:25,972 INFO L226 Difference]: Without dead ends: 24905 [2021-08-21 17:33:25,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:33:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24905 states. [2021-08-21 17:33:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24905 to 13879. [2021-08-21 17:33:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13879 states, 13878 states have (on average 2.3992650237786424) internal successors, (33297), 13878 states have internal predecessors, (33297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13879 states to 13879 states and 33297 transitions. [2021-08-21 17:33:26,359 INFO L78 Accepts]: Start accepts. Automaton has 13879 states and 33297 transitions. Word has length 25 [2021-08-21 17:33:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:26,359 INFO L470 AbstractCegarLoop]: Abstraction has 13879 states and 33297 transitions. [2021-08-21 17:33:26,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 13879 states and 33297 transitions. [2021-08-21 17:33:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:26,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:26,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:26,458 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 17:33:26,654 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,SelfDestructingSolverStorable48 [2021-08-21 17:33:26,654 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1535778280, now seen corresponding path program 17 times [2021-08-21 17:33:26,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:26,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530340004] [2021-08-21 17:33:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:26,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:26,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:26,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530340004] [2021-08-21 17:33:26,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530340004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:26,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825741517] [2021-08-21 17:33:26,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:26,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:26,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:26,716 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 17:33:26,719 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 17:33:27,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:33:27,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:28,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825741517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:28,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:28,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:28,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141364944] [2021-08-21 17:33:28,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:28,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:28,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:28,065 INFO L87 Difference]: Start difference. First operand 13879 states and 33297 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:30,130 INFO L93 Difference]: Finished difference Result 27852 states and 64441 transitions. [2021-08-21 17:33:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 17:33:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:30,198 INFO L225 Difference]: With dead ends: 27852 [2021-08-21 17:33:30,198 INFO L226 Difference]: Without dead ends: 27846 [2021-08-21 17:33:30,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1539.5ms TimeCoverageRelationStatistics Valid=1503, Invalid=4817, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 17:33:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27846 states. [2021-08-21 17:33:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27846 to 15832. [2021-08-21 17:33:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15832 states, 15831 states have (on average 2.4242309392963173) internal successors, (38378), 15831 states have internal predecessors, (38378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15832 states to 15832 states and 38378 transitions. [2021-08-21 17:33:30,701 INFO L78 Accepts]: Start accepts. Automaton has 15832 states and 38378 transitions. Word has length 25 [2021-08-21 17:33:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:30,701 INFO L470 AbstractCegarLoop]: Abstraction has 15832 states and 38378 transitions. [2021-08-21 17:33:30,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 15832 states and 38378 transitions. [2021-08-21 17:33:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:30,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:30,728 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:30,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 17:33:30,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:30,929 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1165256808, now seen corresponding path program 18 times [2021-08-21 17:33:30,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:30,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915673947] [2021-08-21 17:33:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:30,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:31,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:31,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915673947] [2021-08-21 17:33:31,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915673947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:31,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107226172] [2021-08-21 17:33:31,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:31,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:31,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:31,003 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 17:33:31,003 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 17:33:32,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:33:32,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:32,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:32,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107226172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:32,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:32,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-21 17:33:32,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095774001] [2021-08-21 17:33:32,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:32,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:32,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:32,385 INFO L87 Difference]: Start difference. First operand 15832 states and 38378 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:32,996 INFO L93 Difference]: Finished difference Result 18160 states and 43151 transitions. [2021-08-21 17:33:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:33:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:33,037 INFO L225 Difference]: With dead ends: 18160 [2021-08-21 17:33:33,037 INFO L226 Difference]: Without dead ends: 18154 [2021-08-21 17:33:33,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:33:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18154 states. [2021-08-21 17:33:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18154 to 15824. [2021-08-21 17:33:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15824 states, 15823 states have (on average 2.424192630980219) internal successors, (38358), 15823 states have internal predecessors, (38358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15824 states to 15824 states and 38358 transitions. [2021-08-21 17:33:33,395 INFO L78 Accepts]: Start accepts. Automaton has 15824 states and 38358 transitions. Word has length 25 [2021-08-21 17:33:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:33,395 INFO L470 AbstractCegarLoop]: Abstraction has 15824 states and 38358 transitions. [2021-08-21 17:33:33,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 15824 states and 38358 transitions. [2021-08-21 17:33:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:33,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:33,421 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:33,442 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 17:33:33,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:33,622 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1005220952, now seen corresponding path program 19 times [2021-08-21 17:33:33,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:33,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130352815] [2021-08-21 17:33:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:33,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:33,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:33,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130352815] [2021-08-21 17:33:33,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130352815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:33,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62058599] [2021-08-21 17:33:33,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:33,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:33,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:33,705 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 17:33:33,706 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 17:33:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:34,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:34,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:35,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62058599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:35,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:35,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-21 17:33:35,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559813167] [2021-08-21 17:33:35,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:35,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:35,213 INFO L87 Difference]: Start difference. First operand 15824 states and 38358 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:36,506 INFO L93 Difference]: Finished difference Result 21066 states and 49234 transitions. [2021-08-21 17:33:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:33:36,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:36,566 INFO L225 Difference]: With dead ends: 21066 [2021-08-21 17:33:36,566 INFO L226 Difference]: Without dead ends: 21050 [2021-08-21 17:33:36,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 952.6ms TimeCoverageRelationStatistics Valid=572, Invalid=2398, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:33:36,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21050 states. [2021-08-21 17:33:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21050 to 15951. [2021-08-21 17:33:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15951 states, 15950 states have (on average 2.422194357366771) internal successors, (38634), 15950 states have internal predecessors, (38634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15951 states to 15951 states and 38634 transitions. [2021-08-21 17:33:36,984 INFO L78 Accepts]: Start accepts. Automaton has 15951 states and 38634 transitions. Word has length 25 [2021-08-21 17:33:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:36,984 INFO L470 AbstractCegarLoop]: Abstraction has 15951 states and 38634 transitions. [2021-08-21 17:33:36,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 15951 states and 38634 transitions. [2021-08-21 17:33:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:37,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:37,012 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:37,032 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 17:33:37,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:37,213 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash 458524520, now seen corresponding path program 3 times [2021-08-21 17:33:37,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:37,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798026888] [2021-08-21 17:33:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:37,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:37,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:37,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798026888] [2021-08-21 17:33:37,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798026888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:37,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649960878] [2021-08-21 17:33:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:37,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:37,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:37,270 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 17:33:37,274 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 17:33:38,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:33:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:33:38,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:38,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649960878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:38,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:38,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:38,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395908922] [2021-08-21 17:33:38,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:38,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:38,751 INFO L87 Difference]: Start difference. First operand 15951 states and 38634 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:38,980 INFO L93 Difference]: Finished difference Result 20298 states and 47882 transitions. [2021-08-21 17:33:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:33:38,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:39,045 INFO L225 Difference]: With dead ends: 20298 [2021-08-21 17:33:39,046 INFO L226 Difference]: Without dead ends: 20292 [2021-08-21 17:33:39,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:33:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20292 states. [2021-08-21 17:33:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20292 to 16803. [2021-08-21 17:33:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 16802 states have (on average 2.4195929056064753) internal successors, (40654), 16802 states have internal predecessors, (40654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 40654 transitions. [2021-08-21 17:33:39,395 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 40654 transitions. Word has length 25 [2021-08-21 17:33:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:39,395 INFO L470 AbstractCegarLoop]: Abstraction has 16803 states and 40654 transitions. [2021-08-21 17:33:39,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 40654 transitions. [2021-08-21 17:33:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:39,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:39,422 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:39,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 17:33:39,630 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,SelfDestructingSolverStorable52 [2021-08-21 17:33:39,631 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash 572338212, now seen corresponding path program 20 times [2021-08-21 17:33:39,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:39,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081847642] [2021-08-21 17:33:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:39,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:39,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:39,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081847642] [2021-08-21 17:33:39,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081847642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:39,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925914419] [2021-08-21 17:33:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:33:39,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:39,700 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 17:33:39,702 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 17:33:40,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:33:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:40,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:40,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:41,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925914419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:41,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:41,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:41,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727214963] [2021-08-21 17:33:41,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:41,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:41,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:41,280 INFO L87 Difference]: Start difference. First operand 16803 states and 40654 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:42,250 INFO L93 Difference]: Finished difference Result 28184 states and 65189 transitions. [2021-08-21 17:33:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:33:42,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:42,407 INFO L225 Difference]: With dead ends: 28184 [2021-08-21 17:33:42,407 INFO L226 Difference]: Without dead ends: 28184 [2021-08-21 17:33:42,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:33:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28184 states. [2021-08-21 17:33:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28184 to 19645. [2021-08-21 17:33:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19645 states, 19644 states have (on average 2.427916921197312) internal successors, (47694), 19644 states have internal predecessors, (47694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19645 states to 19645 states and 47694 transitions. [2021-08-21 17:33:42,806 INFO L78 Accepts]: Start accepts. Automaton has 19645 states and 47694 transitions. Word has length 25 [2021-08-21 17:33:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:42,806 INFO L470 AbstractCegarLoop]: Abstraction has 19645 states and 47694 transitions. [2021-08-21 17:33:42,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 19645 states and 47694 transitions. [2021-08-21 17:33:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:42,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:42,837 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:42,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 17:33:43,037 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,SelfDestructingSolverStorable53 [2021-08-21 17:33:43,037 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1091002276, now seen corresponding path program 21 times [2021-08-21 17:33:43,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:43,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599583590] [2021-08-21 17:33:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:43,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:43,089 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 17:33:43,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:43,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599583590] [2021-08-21 17:33:43,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599583590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:43,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781458306] [2021-08-21 17:33:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:33:43,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:43,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:43,091 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 17:33:43,091 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 17:33:44,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:33:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:44,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:44,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:44,638 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 17:33:44,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781458306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:44,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:44,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:33:44,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484932990] [2021-08-21 17:33:44,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:44,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:44,639 INFO L87 Difference]: Start difference. First operand 19645 states and 47694 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:45,329 INFO L93 Difference]: Finished difference Result 20679 states and 49502 transitions. [2021-08-21 17:33:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:33:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:45,378 INFO L225 Difference]: With dead ends: 20679 [2021-08-21 17:33:45,378 INFO L226 Difference]: Without dead ends: 20661 [2021-08-21 17:33:45,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:33:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20661 states. [2021-08-21 17:33:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20661 to 19696. [2021-08-21 17:33:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19696 states, 19695 states have (on average 2.426148768723026) internal successors, (47783), 19695 states have internal predecessors, (47783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19696 states to 19696 states and 47783 transitions. [2021-08-21 17:33:45,766 INFO L78 Accepts]: Start accepts. Automaton has 19696 states and 47783 transitions. Word has length 25 [2021-08-21 17:33:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:45,767 INFO L470 AbstractCegarLoop]: Abstraction has 19696 states and 47783 transitions. [2021-08-21 17:33:45,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19696 states and 47783 transitions. [2021-08-21 17:33:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:45,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:45,797 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:45,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 17:33:45,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:45,998 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2011498588, now seen corresponding path program 22 times [2021-08-21 17:33:45,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:45,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111505158] [2021-08-21 17:33:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:45,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:46,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:46,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111505158] [2021-08-21 17:33:46,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111505158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:46,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211426189] [2021-08-21 17:33:46,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:33:46,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:46,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:46,056 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 17:33:46,076 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 17:33:47,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:33:47,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:47,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:47,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211426189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:47,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:47,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:33:47,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482852990] [2021-08-21 17:33:47,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:47,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:47,833 INFO L87 Difference]: Start difference. First operand 19696 states and 47783 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:48,683 INFO L93 Difference]: Finished difference Result 20601 states and 49294 transitions. [2021-08-21 17:33:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 17:33:48,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:48,730 INFO L225 Difference]: With dead ends: 20601 [2021-08-21 17:33:48,730 INFO L226 Difference]: Without dead ends: 20593 [2021-08-21 17:33:48,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 615.1ms TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:33:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20593 states. [2021-08-21 17:33:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20593 to 19708. [2021-08-21 17:33:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19708 states, 19707 states have (on average 2.4253311006241436) internal successors, (47796), 19707 states have internal predecessors, (47796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19708 states to 19708 states and 47796 transitions. [2021-08-21 17:33:49,116 INFO L78 Accepts]: Start accepts. Automaton has 19708 states and 47796 transitions. Word has length 25 [2021-08-21 17:33:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:49,117 INFO L470 AbstractCegarLoop]: Abstraction has 19708 states and 47796 transitions. [2021-08-21 17:33:49,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 19708 states and 47796 transitions. [2021-08-21 17:33:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:49,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:49,223 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:49,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 17:33:49,423 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,SelfDestructingSolverStorable55 [2021-08-21 17:33:49,424 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 791973796, now seen corresponding path program 23 times [2021-08-21 17:33:49,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:49,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001500469] [2021-08-21 17:33:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:49,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:49,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:49,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001500469] [2021-08-21 17:33:49,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001500469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:49,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553402734] [2021-08-21 17:33:49,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:33:49,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:49,479 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 17:33:49,517 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 17:33:50,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:33:50,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:51,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553402734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:51,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:51,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:33:51,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906281462] [2021-08-21 17:33:51,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:51,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:51,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:51,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:51,029 INFO L87 Difference]: Start difference. First operand 19708 states and 47796 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:52,371 INFO L93 Difference]: Finished difference Result 20677 states and 49446 transitions. [2021-08-21 17:33:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 17:33:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:52,423 INFO L225 Difference]: With dead ends: 20677 [2021-08-21 17:33:52,423 INFO L226 Difference]: Without dead ends: 20677 [2021-08-21 17:33:52,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1011.6ms TimeCoverageRelationStatistics Valid=1079, Invalid=3343, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 17:33:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20677 states. [2021-08-21 17:33:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20677 to 19508. [2021-08-21 17:33:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19508 states, 19507 states have (on average 2.428205259650382) internal successors, (47367), 19507 states have internal predecessors, (47367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19508 states to 19508 states and 47367 transitions. [2021-08-21 17:33:52,849 INFO L78 Accepts]: Start accepts. Automaton has 19508 states and 47367 transitions. Word has length 25 [2021-08-21 17:33:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:52,850 INFO L470 AbstractCegarLoop]: Abstraction has 19508 states and 47367 transitions. [2021-08-21 17:33:52,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 19508 states and 47367 transitions. [2021-08-21 17:33:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:52,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:52,880 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:52,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 17:33:53,080 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,SelfDestructingSolverStorable56 [2021-08-21 17:33:53,080 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash 663927272, now seen corresponding path program 24 times [2021-08-21 17:33:53,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:53,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010223263] [2021-08-21 17:33:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:53,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:53,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:53,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010223263] [2021-08-21 17:33:53,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010223263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:53,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091496575] [2021-08-21 17:33:53,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:33:53,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:53,143 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 17:33:53,145 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 17:33:54,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:33:54,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:33:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:33:54,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:54,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091496575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:54,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:54,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:33:54,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511438826] [2021-08-21 17:33:54,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:33:54,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:33:54,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:33:54,706 INFO L87 Difference]: Start difference. First operand 19508 states and 47367 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:55,499 INFO L93 Difference]: Finished difference Result 34238 states and 79623 transitions. [2021-08-21 17:33:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:33:55,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:55,691 INFO L225 Difference]: With dead ends: 34238 [2021-08-21 17:33:55,691 INFO L226 Difference]: Without dead ends: 34238 [2021-08-21 17:33:55,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:33:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34238 states. [2021-08-21 17:33:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34238 to 21987. [2021-08-21 17:33:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21987 states, 21986 states have (on average 2.423815155098699) internal successors, (53290), 21986 states have internal predecessors, (53290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21987 states to 21987 states and 53290 transitions. [2021-08-21 17:33:56,175 INFO L78 Accepts]: Start accepts. Automaton has 21987 states and 53290 transitions. Word has length 25 [2021-08-21 17:33:56,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:56,176 INFO L470 AbstractCegarLoop]: Abstraction has 21987 states and 53290 transitions. [2021-08-21 17:33:56,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21987 states and 53290 transitions. [2021-08-21 17:33:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:56,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:56,211 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:56,234 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 17:33:56,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:56,412 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:33:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:33:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 6646120, now seen corresponding path program 25 times [2021-08-21 17:33:56,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:33:56,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267035838] [2021-08-21 17:33:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:33:56,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:33:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:33:56,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:33:56,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267035838] [2021-08-21 17:33:56,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267035838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:56,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006922265] [2021-08-21 17:33:56,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:33:56,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:33:56,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:33:56,468 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 17:33:56,469 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 17:33:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:33:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:33:57,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:33:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:33:58,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006922265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:33:58,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:33:58,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:33:58,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605721039] [2021-08-21 17:33:58,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:33:58,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:33:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:33:58,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:33:58,071 INFO L87 Difference]: Start difference. First operand 21987 states and 53290 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:33:59,338 INFO L93 Difference]: Finished difference Result 22941 states and 55132 transitions. [2021-08-21 17:33:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 17:33:59,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:33:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:33:59,395 INFO L225 Difference]: With dead ends: 22941 [2021-08-21 17:33:59,395 INFO L226 Difference]: Without dead ends: 22941 [2021-08-21 17:33:59,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 893.0ms TimeCoverageRelationStatistics Valid=769, Invalid=2311, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 17:33:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22941 states. [2021-08-21 17:33:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22941 to 22179. [2021-08-21 17:33:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22179 states, 22178 states have (on average 2.4218144106772477) internal successors, (53711), 22178 states have internal predecessors, (53711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22179 states to 22179 states and 53711 transitions. [2021-08-21 17:33:59,850 INFO L78 Accepts]: Start accepts. Automaton has 22179 states and 53711 transitions. Word has length 25 [2021-08-21 17:33:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:33:59,850 INFO L470 AbstractCegarLoop]: Abstraction has 22179 states and 53711 transitions. [2021-08-21 17:33:59,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:33:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22179 states and 53711 transitions. [2021-08-21 17:33:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:33:59,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:33:59,884 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:33:59,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 17:34:00,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:00,085 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:00,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1579030888, now seen corresponding path program 26 times [2021-08-21 17:34:00,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:00,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168465880] [2021-08-21 17:34:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:00,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:00,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:00,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168465880] [2021-08-21 17:34:00,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168465880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:00,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756419340] [2021-08-21 17:34:00,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:00,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:00,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:00,153 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 17:34:00,176 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 17:34:01,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:01,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756419340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:01,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:01,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:34:01,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901808798] [2021-08-21 17:34:01,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:34:01,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:01,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:34:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:01,931 INFO L87 Difference]: Start difference. First operand 22179 states and 53711 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:02,595 INFO L93 Difference]: Finished difference Result 23087 states and 55351 transitions. [2021-08-21 17:34:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:34:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:02,650 INFO L225 Difference]: With dead ends: 23087 [2021-08-21 17:34:02,650 INFO L226 Difference]: Without dead ends: 23081 [2021-08-21 17:34:02,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:34:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23081 states. [2021-08-21 17:34:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23081 to 22217. [2021-08-21 17:34:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.4213179690313287) internal successors, (53792), 22216 states have internal predecessors, (53792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 53792 transitions. [2021-08-21 17:34:03,124 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 53792 transitions. Word has length 25 [2021-08-21 17:34:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:03,124 INFO L470 AbstractCegarLoop]: Abstraction has 22217 states and 53792 transitions. [2021-08-21 17:34:03,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 53792 transitions. [2021-08-21 17:34:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:03,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:03,156 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:03,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 17:34:03,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 17:34:03,356 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash 87535976, now seen corresponding path program 27 times [2021-08-21 17:34:03,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:03,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694767304] [2021-08-21 17:34:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:03,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:03,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:03,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694767304] [2021-08-21 17:34:03,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694767304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:03,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290354780] [2021-08-21 17:34:03,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:34:03,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:03,409 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 17:34:03,410 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 17:34:04,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:34:04,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290354780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:05,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:05,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:34:05,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771529091] [2021-08-21 17:34:05,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:34:05,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:34:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:05,097 INFO L87 Difference]: Start difference. First operand 22217 states and 53792 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:06,247 INFO L93 Difference]: Finished difference Result 23071 states and 55327 transitions. [2021-08-21 17:34:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 17:34:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:06,299 INFO L225 Difference]: With dead ends: 23071 [2021-08-21 17:34:06,299 INFO L226 Difference]: Without dead ends: 23071 [2021-08-21 17:34:06,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 837.2ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:34:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23071 states. [2021-08-21 17:34:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23071 to 22189. [2021-08-21 17:34:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22189 states, 22188 states have (on average 2.4209031909140077) internal successors, (53715), 22188 states have internal predecessors, (53715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22189 states to 22189 states and 53715 transitions. [2021-08-21 17:34:06,758 INFO L78 Accepts]: Start accepts. Automaton has 22189 states and 53715 transitions. Word has length 25 [2021-08-21 17:34:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:06,758 INFO L470 AbstractCegarLoop]: Abstraction has 22189 states and 53715 transitions. [2021-08-21 17:34:06,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 22189 states and 53715 transitions. [2021-08-21 17:34:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:06,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:06,790 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:06,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 17:34:06,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:06,991 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:06,992 INFO L82 PathProgramCache]: Analyzing trace with hash -105507932, now seen corresponding path program 28 times [2021-08-21 17:34:06,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:06,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025333726] [2021-08-21 17:34:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:06,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:07,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:07,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025333726] [2021-08-21 17:34:07,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025333726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:07,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449648717] [2021-08-21 17:34:07,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:07,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:07,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:07,049 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 17:34:07,050 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 17:34:08,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:34:08,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:08,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:34:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:08,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449648717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:08,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:08,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:34:08,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191594767] [2021-08-21 17:34:08,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:34:08,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:34:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:34:08,801 INFO L87 Difference]: Start difference. First operand 22189 states and 53715 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:10,796 INFO L93 Difference]: Finished difference Result 42849 states and 100203 transitions. [2021-08-21 17:34:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 17:34:10,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:10,913 INFO L225 Difference]: With dead ends: 42849 [2021-08-21 17:34:10,913 INFO L226 Difference]: Without dead ends: 42845 [2021-08-21 17:34:10,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 1391.8ms TimeCoverageRelationStatistics Valid=1391, Invalid=4309, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 17:34:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42845 states. [2021-08-21 17:34:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42845 to 22830. [2021-08-21 17:34:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22830 states, 22829 states have (on average 2.4309869026238555) internal successors, (55497), 22829 states have internal predecessors, (55497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22830 states to 22830 states and 55497 transitions. [2021-08-21 17:34:11,558 INFO L78 Accepts]: Start accepts. Automaton has 22830 states and 55497 transitions. Word has length 25 [2021-08-21 17:34:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:11,559 INFO L470 AbstractCegarLoop]: Abstraction has 22830 states and 55497 transitions. [2021-08-21 17:34:11,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 22830 states and 55497 transitions. [2021-08-21 17:34:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:11,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:11,594 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:11,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 17:34:11,794 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,SelfDestructingSolverStorable61 [2021-08-21 17:34:11,794 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:11,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1153352344, now seen corresponding path program 29 times [2021-08-21 17:34:11,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:11,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801908324] [2021-08-21 17:34:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:11,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:11,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:11,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801908324] [2021-08-21 17:34:11,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801908324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:11,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950216068] [2021-08-21 17:34:11,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:34:11,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:11,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:11,846 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 17:34:11,846 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 17:34:13,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:34:13,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:13,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:34:13,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:13,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950216068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:13,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:13,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:34:13,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63489549] [2021-08-21 17:34:13,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:34:13,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:34:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:34:13,635 INFO L87 Difference]: Start difference. First operand 22830 states and 55497 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:15,543 INFO L93 Difference]: Finished difference Result 43650 states and 101324 transitions. [2021-08-21 17:34:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 17:34:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:15,658 INFO L225 Difference]: With dead ends: 43650 [2021-08-21 17:34:15,659 INFO L226 Difference]: Without dead ends: 43646 [2021-08-21 17:34:15,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 1356.7ms TimeCoverageRelationStatistics Valid=1519, Invalid=4643, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 17:34:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43646 states. [2021-08-21 17:34:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43646 to 25502. [2021-08-21 17:34:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25501 states have (on average 2.4321007019332574) internal successors, (62021), 25501 states have internal predecessors, (62021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 62021 transitions. [2021-08-21 17:34:16,440 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 62021 transitions. Word has length 25 [2021-08-21 17:34:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:16,440 INFO L470 AbstractCegarLoop]: Abstraction has 25502 states and 62021 transitions. [2021-08-21 17:34:16,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 62021 transitions. [2021-08-21 17:34:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:16,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:16,478 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:16,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 17:34:16,678 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,SelfDestructingSolverStorable62 [2021-08-21 17:34:16,679 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash -290033952, now seen corresponding path program 30 times [2021-08-21 17:34:16,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:16,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889351186] [2021-08-21 17:34:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:16,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:16,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:16,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889351186] [2021-08-21 17:34:16,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889351186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:16,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958605693] [2021-08-21 17:34:16,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:16,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:16,750 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 17:34:16,751 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 17:34:18,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:34:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:18,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:18,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958605693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:18,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:18,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:34:18,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097649942] [2021-08-21 17:34:18,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:34:18,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:34:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:34:18,498 INFO L87 Difference]: Start difference. First operand 25502 states and 62021 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:18,901 INFO L93 Difference]: Finished difference Result 25872 states and 62668 transitions. [2021-08-21 17:34:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:34:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:18,966 INFO L225 Difference]: With dead ends: 25872 [2021-08-21 17:34:18,967 INFO L226 Difference]: Without dead ends: 25862 [2021-08-21 17:34:18,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:34:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25862 states. [2021-08-21 17:34:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25862 to 25566. [2021-08-21 17:34:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25566 states, 25565 states have (on average 2.4312145511441425) internal successors, (62154), 25565 states have internal predecessors, (62154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25566 states to 25566 states and 62154 transitions. [2021-08-21 17:34:19,552 INFO L78 Accepts]: Start accepts. Automaton has 25566 states and 62154 transitions. Word has length 25 [2021-08-21 17:34:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:19,553 INFO L470 AbstractCegarLoop]: Abstraction has 25566 states and 62154 transitions. [2021-08-21 17:34:19,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 25566 states and 62154 transitions. [2021-08-21 17:34:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:19,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:19,594 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:19,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 17:34:19,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:19,794 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:19,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1364758364, now seen corresponding path program 31 times [2021-08-21 17:34:19,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:19,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775964634] [2021-08-21 17:34:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:19,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:19,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:19,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775964634] [2021-08-21 17:34:19,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775964634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:19,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475252303] [2021-08-21 17:34:19,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:19,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:19,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:19,857 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 17:34:19,858 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 17:34:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:21,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:21,688 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 17:34:21,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475252303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:21,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:21,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:34:21,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295979101] [2021-08-21 17:34:21,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:34:21,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:21,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:34:21,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:21,689 INFO L87 Difference]: Start difference. First operand 25566 states and 62154 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:22,208 INFO L93 Difference]: Finished difference Result 25827 states and 62553 transitions. [2021-08-21 17:34:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:34:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:22,275 INFO L225 Difference]: With dead ends: 25827 [2021-08-21 17:34:22,275 INFO L226 Difference]: Without dead ends: 25815 [2021-08-21 17:34:22,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:34:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25815 states. [2021-08-21 17:34:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25815 to 25594. [2021-08-21 17:34:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25594 states, 25593 states have (on average 2.4310162935177586) internal successors, (62217), 25593 states have internal predecessors, (62217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25594 states to 25594 states and 62217 transitions. [2021-08-21 17:34:22,832 INFO L78 Accepts]: Start accepts. Automaton has 25594 states and 62217 transitions. Word has length 25 [2021-08-21 17:34:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:22,832 INFO L470 AbstractCegarLoop]: Abstraction has 25594 states and 62217 transitions. [2021-08-21 17:34:22,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 25594 states and 62217 transitions. [2021-08-21 17:34:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:22,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:22,870 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:22,893 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 17:34:23,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:23,080 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2008421224, now seen corresponding path program 32 times [2021-08-21 17:34:23,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:23,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485902070] [2021-08-21 17:34:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:23,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:23,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:23,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485902070] [2021-08-21 17:34:23,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485902070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:23,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399114007] [2021-08-21 17:34:23,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:23,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:23,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:23,204 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 17:34:23,205 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 17:34:24,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:24,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:25,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399114007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:25,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:25,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:34:25,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186081430] [2021-08-21 17:34:25,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:34:25,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:34:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:25,040 INFO L87 Difference]: Start difference. First operand 25594 states and 62217 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:25,615 INFO L93 Difference]: Finished difference Result 26075 states and 62991 transitions. [2021-08-21 17:34:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:34:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:25,676 INFO L225 Difference]: With dead ends: 26075 [2021-08-21 17:34:25,676 INFO L226 Difference]: Without dead ends: 26069 [2021-08-21 17:34:25,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:34:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26069 states. [2021-08-21 17:34:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26069 to 25678. [2021-08-21 17:34:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25678 states, 25677 states have (on average 2.429177863457569) internal successors, (62374), 25677 states have internal predecessors, (62374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25678 states to 25678 states and 62374 transitions. [2021-08-21 17:34:26,249 INFO L78 Accepts]: Start accepts. Automaton has 25678 states and 62374 transitions. Word has length 25 [2021-08-21 17:34:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:26,249 INFO L470 AbstractCegarLoop]: Abstraction has 25678 states and 62374 transitions. [2021-08-21 17:34:26,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 25678 states and 62374 transitions. [2021-08-21 17:34:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:26,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:26,294 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:26,319 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 17:34:26,506 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,SelfDestructingSolverStorable65 [2021-08-21 17:34:26,507 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:26,507 INFO L82 PathProgramCache]: Analyzing trace with hash 516926312, now seen corresponding path program 33 times [2021-08-21 17:34:26,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:26,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041877410] [2021-08-21 17:34:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:26,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:26,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:26,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041877410] [2021-08-21 17:34:26,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041877410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:26,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054343653] [2021-08-21 17:34:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:34:26,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:26,577 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 17:34:26,612 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 17:34:28,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:34:28,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:28,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:34:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:28,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054343653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:28,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:28,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:34:28,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304983512] [2021-08-21 17:34:28,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:34:28,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:34:28,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:34:28,393 INFO L87 Difference]: Start difference. First operand 25678 states and 62374 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:29,377 INFO L93 Difference]: Finished difference Result 26028 states and 62928 transitions. [2021-08-21 17:34:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:34:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:29,447 INFO L225 Difference]: With dead ends: 26028 [2021-08-21 17:34:29,448 INFO L226 Difference]: Without dead ends: 26028 [2021-08-21 17:34:29,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=561, Invalid=1601, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 17:34:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26028 states. [2021-08-21 17:34:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26028 to 25702. [2021-08-21 17:34:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25702 states, 25701 states have (on average 2.428115637523832) internal successors, (62405), 25701 states have internal predecessors, (62405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25702 states to 25702 states and 62405 transitions. [2021-08-21 17:34:29,936 INFO L78 Accepts]: Start accepts. Automaton has 25702 states and 62405 transitions. Word has length 25 [2021-08-21 17:34:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:29,936 INFO L470 AbstractCegarLoop]: Abstraction has 25702 states and 62405 transitions. [2021-08-21 17:34:29,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 25702 states and 62405 transitions. [2021-08-21 17:34:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:29,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:29,980 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:30,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 17:34:30,180 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,SelfDestructingSolverStorable66 [2021-08-21 17:34:30,181 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1784629408, now seen corresponding path program 26 times [2021-08-21 17:34:30,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:30,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613726684] [2021-08-21 17:34:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:30,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:30,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:30,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613726684] [2021-08-21 17:34:30,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613726684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:30,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317238372] [2021-08-21 17:34:30,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:34:30,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:30,226 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 17:34:30,226 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 17:34:31,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:34:31,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:31,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:34:31,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:31,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317238372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:31,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:31,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 17:34:31,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415836988] [2021-08-21 17:34:31,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:34:31,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:31,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:34:31,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:34:31,913 INFO L87 Difference]: Start difference. First operand 25702 states and 62405 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:32,156 INFO L93 Difference]: Finished difference Result 34903 states and 83144 transitions. [2021-08-21 17:34:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:34:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:32,251 INFO L225 Difference]: With dead ends: 34903 [2021-08-21 17:34:32,251 INFO L226 Difference]: Without dead ends: 34901 [2021-08-21 17:34:32,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:34:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34901 states. [2021-08-21 17:34:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34901 to 30756. [2021-08-21 17:34:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30756 states, 30755 states have (on average 2.4291985043082427) internal successors, (74710), 30755 states have internal predecessors, (74710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30756 states to 30756 states and 74710 transitions. [2021-08-21 17:34:32,973 INFO L78 Accepts]: Start accepts. Automaton has 30756 states and 74710 transitions. Word has length 25 [2021-08-21 17:34:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:32,973 INFO L470 AbstractCegarLoop]: Abstraction has 30756 states and 74710 transitions. [2021-08-21 17:34:32,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 30756 states and 74710 transitions. [2021-08-21 17:34:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:33,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:33,028 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:33,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 17:34:33,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:33,228 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1482770144, now seen corresponding path program 34 times [2021-08-21 17:34:33,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:33,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059999325] [2021-08-21 17:34:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:33,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:33,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:33,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059999325] [2021-08-21 17:34:33,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059999325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:33,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123480277] [2021-08-21 17:34:33,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:33,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:33,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:33,293 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 17:34:33,294 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 17:34:34,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:34:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:34:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:35,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123480277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:35,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:35,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:34:35,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869501809] [2021-08-21 17:34:35,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:34:35,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:34:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:34:35,153 INFO L87 Difference]: Start difference. First operand 30756 states and 74710 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:36,929 INFO L93 Difference]: Finished difference Result 63290 states and 147049 transitions. [2021-08-21 17:34:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 17:34:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:37,124 INFO L225 Difference]: With dead ends: 63290 [2021-08-21 17:34:37,124 INFO L226 Difference]: Without dead ends: 63282 [2021-08-21 17:34:37,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1200.8ms TimeCoverageRelationStatistics Valid=1049, Invalid=3507, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:34:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63282 states. [2021-08-21 17:34:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63282 to 32847. [2021-08-21 17:34:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32847 states, 32846 states have (on average 2.4371917432868537) internal successors, (80052), 32846 states have internal predecessors, (80052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32847 states to 32847 states and 80052 transitions. [2021-08-21 17:34:38,242 INFO L78 Accepts]: Start accepts. Automaton has 32847 states and 80052 transitions. Word has length 25 [2021-08-21 17:34:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:38,243 INFO L470 AbstractCegarLoop]: Abstraction has 32847 states and 80052 transitions. [2021-08-21 17:34:38,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 32847 states and 80052 transitions. [2021-08-21 17:34:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:38,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:38,301 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:38,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 17:34:38,501 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,SelfDestructingSolverStorable68 [2021-08-21 17:34:38,502 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2071944872, now seen corresponding path program 35 times [2021-08-21 17:34:38,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:38,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957863963] [2021-08-21 17:34:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:38,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:38,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:38,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957863963] [2021-08-21 17:34:38,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957863963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:38,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663649653] [2021-08-21 17:34:38,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:34:38,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:38,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:38,558 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 17:34:38,558 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 17:34:40,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:34:40,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:34:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:40,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663649653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:40,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:40,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:34:40,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482493200] [2021-08-21 17:34:40,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:34:40,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:40,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:34:40,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:34:40,831 INFO L87 Difference]: Start difference. First operand 32847 states and 80052 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:42,214 INFO L93 Difference]: Finished difference Result 51275 states and 121322 transitions. [2021-08-21 17:34:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 17:34:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:42,380 INFO L225 Difference]: With dead ends: 51275 [2021-08-21 17:34:42,380 INFO L226 Difference]: Without dead ends: 51269 [2021-08-21 17:34:42,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:34:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51269 states. [2021-08-21 17:34:43,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51269 to 34433. [2021-08-21 17:34:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34433 states, 34432 states have (on average 2.4446445167286246) internal successors, (84174), 34432 states have internal predecessors, (84174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34433 states to 34433 states and 84174 transitions. [2021-08-21 17:34:43,381 INFO L78 Accepts]: Start accepts. Automaton has 34433 states and 84174 transitions. Word has length 25 [2021-08-21 17:34:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:43,381 INFO L470 AbstractCegarLoop]: Abstraction has 34433 states and 84174 transitions. [2021-08-21 17:34:43,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 34433 states and 84174 transitions. [2021-08-21 17:34:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:43,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:43,448 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:43,470 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 17:34:43,648 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,SelfDestructingSolverStorable69 [2021-08-21 17:34:43,649 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 665927336, now seen corresponding path program 36 times [2021-08-21 17:34:43,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:43,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273861146] [2021-08-21 17:34:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:43,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:43,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:43,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273861146] [2021-08-21 17:34:43,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273861146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:43,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474766534] [2021-08-21 17:34:43,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:34:43,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:43,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:43,713 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 17:34:43,714 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 17:34:45,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:34:45,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:34:45,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:45,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474766534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:45,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:45,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:34:45,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223119244] [2021-08-21 17:34:45,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:34:45,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:34:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:34:45,858 INFO L87 Difference]: Start difference. First operand 34433 states and 84174 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:47,490 INFO L93 Difference]: Finished difference Result 67784 states and 157866 transitions. [2021-08-21 17:34:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 17:34:47,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:47,698 INFO L225 Difference]: With dead ends: 67784 [2021-08-21 17:34:47,699 INFO L226 Difference]: Without dead ends: 67776 [2021-08-21 17:34:47,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1036.7ms TimeCoverageRelationStatistics Valid=854, Invalid=2806, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:34:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67776 states. [2021-08-21 17:34:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67776 to 35613. [2021-08-21 17:34:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35613 states, 35612 states have (on average 2.445776704481635) internal successors, (87099), 35612 states have internal predecessors, (87099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35613 states to 35613 states and 87099 transitions. [2021-08-21 17:34:49,032 INFO L78 Accepts]: Start accepts. Automaton has 35613 states and 87099 transitions. Word has length 25 [2021-08-21 17:34:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:49,032 INFO L470 AbstractCegarLoop]: Abstraction has 35613 states and 87099 transitions. [2021-08-21 17:34:49,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 35613 states and 87099 transitions. [2021-08-21 17:34:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:49,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:49,095 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:49,116 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 17:34:49,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:49,296 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash -22310556, now seen corresponding path program 27 times [2021-08-21 17:34:49,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:49,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460490861] [2021-08-21 17:34:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:49,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:49,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:49,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460490861] [2021-08-21 17:34:49,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460490861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:49,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218838775] [2021-08-21 17:34:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:34:49,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:49,341 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 17:34:49,342 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 17:34:51,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:34:51,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:34:51,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:34:51,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:34:51,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218838775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:51,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:51,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:34:51,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890453113] [2021-08-21 17:34:51,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:34:51,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:34:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:34:51,285 INFO L87 Difference]: Start difference. First operand 35613 states and 87099 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:51,608 INFO L93 Difference]: Finished difference Result 46544 states and 111558 transitions. [2021-08-21 17:34:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:34:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:51,754 INFO L225 Difference]: With dead ends: 46544 [2021-08-21 17:34:51,754 INFO L226 Difference]: Without dead ends: 46544 [2021-08-21 17:34:51,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:34:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46544 states. [2021-08-21 17:34:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46544 to 39733. [2021-08-21 17:34:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39733 states, 39732 states have (on average 2.4413067552602437) internal successors, (96998), 39732 states have internal predecessors, (96998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39733 states to 39733 states and 96998 transitions. [2021-08-21 17:34:52,744 INFO L78 Accepts]: Start accepts. Automaton has 39733 states and 96998 transitions. Word has length 25 [2021-08-21 17:34:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:52,744 INFO L470 AbstractCegarLoop]: Abstraction has 39733 states and 96998 transitions. [2021-08-21 17:34:52,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39733 states and 96998 transitions. [2021-08-21 17:34:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:52,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:52,807 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:52,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 17:34:53,020 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,SelfDestructingSolverStorable71 [2021-08-21 17:34:53,021 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash 634970596, now seen corresponding path program 37 times [2021-08-21 17:34:53,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:53,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131183017] [2021-08-21 17:34:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:53,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:53,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131183017] [2021-08-21 17:34:53,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131183017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:53,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629683679] [2021-08-21 17:34:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:34:53,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:53,091 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 17:34:53,115 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 17:34:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:55,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:34:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:34:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629683679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:55,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:34:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:34:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553098704] [2021-08-21 17:34:55,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:34:55,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:34:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:34:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:34:55,358 INFO L87 Difference]: Start difference. First operand 39733 states and 96998 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:34:56,579 INFO L93 Difference]: Finished difference Result 66273 states and 155676 transitions. [2021-08-21 17:34:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:34:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:34:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:34:56,770 INFO L225 Difference]: With dead ends: 66273 [2021-08-21 17:34:56,770 INFO L226 Difference]: Without dead ends: 66273 [2021-08-21 17:34:56,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 766.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1788, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:34:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66273 states. [2021-08-21 17:34:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66273 to 41010. [2021-08-21 17:34:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41010 states, 41009 states have (on average 2.443878173083957) internal successors, (100221), 41009 states have internal predecessors, (100221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41010 states to 41010 states and 100221 transitions. [2021-08-21 17:34:58,153 INFO L78 Accepts]: Start accepts. Automaton has 41010 states and 100221 transitions. Word has length 25 [2021-08-21 17:34:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:34:58,153 INFO L470 AbstractCegarLoop]: Abstraction has 41010 states and 100221 transitions. [2021-08-21 17:34:58,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:34:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41010 states and 100221 transitions. [2021-08-21 17:34:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:34:58,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:34:58,222 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:34:58,242 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 17:34:58,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:58,422 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:34:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:34:58,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1501121448, now seen corresponding path program 28 times [2021-08-21 17:34:58,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:34:58,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828902224] [2021-08-21 17:34:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:34:58,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:34:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:34:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:34:58,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:34:58,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828902224] [2021-08-21 17:34:58,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828902224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:34:58,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738640437] [2021-08-21 17:34:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:34:58,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:34:58,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:34:58,512 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 17:34:58,514 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 17:35:00,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:35:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:00,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738640437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:00,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:00,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:35:00,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462615563] [2021-08-21 17:35:00,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:00,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:00,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:00,880 INFO L87 Difference]: Start difference. First operand 41010 states and 100221 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:01,889 INFO L93 Difference]: Finished difference Result 41423 states and 100981 transitions. [2021-08-21 17:35:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:35:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:02,013 INFO L225 Difference]: With dead ends: 41423 [2021-08-21 17:35:02,013 INFO L226 Difference]: Without dead ends: 41423 [2021-08-21 17:35:02,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=440, Invalid=1630, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:35:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41423 states. [2021-08-21 17:35:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41423 to 40962. [2021-08-21 17:35:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40962 states, 40961 states have (on average 2.444105368521276) internal successors, (100113), 40961 states have internal predecessors, (100113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40962 states to 40962 states and 100113 transitions. [2021-08-21 17:35:03,115 INFO L78 Accepts]: Start accepts. Automaton has 40962 states and 100113 transitions. Word has length 25 [2021-08-21 17:35:03,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:03,115 INFO L470 AbstractCegarLoop]: Abstraction has 40962 states and 100113 transitions. [2021-08-21 17:35:03,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 40962 states and 100113 transitions. [2021-08-21 17:35:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:03,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:03,193 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:03,216 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 17:35:03,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:03,394 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:03,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:03,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570136, now seen corresponding path program 38 times [2021-08-21 17:35:03,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:03,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153450017] [2021-08-21 17:35:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:03,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:03,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:03,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153450017] [2021-08-21 17:35:03,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153450017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:03,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526687997] [2021-08-21 17:35:03,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:03,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:03,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:03,689 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 17:35:03,690 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 17:35:05,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:35:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:05,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526687997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:05,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:05,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:35:05,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525456848] [2021-08-21 17:35:05,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:05,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:05,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:05,979 INFO L87 Difference]: Start difference. First operand 40962 states and 100113 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:07,198 INFO L93 Difference]: Finished difference Result 69939 states and 159762 transitions. [2021-08-21 17:35:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 17:35:07,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:07,568 INFO L225 Difference]: With dead ends: 69939 [2021-08-21 17:35:07,570 INFO L226 Difference]: Without dead ends: 69939 [2021-08-21 17:35:07,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 17:35:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69939 states. [2021-08-21 17:35:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69939 to 41042. [2021-08-21 17:35:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41042 states, 41041 states have (on average 2.4447260057016154) internal successors, (100334), 41041 states have internal predecessors, (100334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41042 states to 41042 states and 100334 transitions. [2021-08-21 17:35:08,995 INFO L78 Accepts]: Start accepts. Automaton has 41042 states and 100334 transitions. Word has length 25 [2021-08-21 17:35:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:08,995 INFO L470 AbstractCegarLoop]: Abstraction has 41042 states and 100334 transitions. [2021-08-21 17:35:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 41042 states and 100334 transitions. [2021-08-21 17:35:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:09,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:09,105 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:09,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 17:35:09,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:09,309 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1688819940, now seen corresponding path program 29 times [2021-08-21 17:35:09,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:09,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049343763] [2021-08-21 17:35:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:09,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:09,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:09,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049343763] [2021-08-21 17:35:09,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049343763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:09,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413353316] [2021-08-21 17:35:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:09,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:09,398 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 17:35:09,399 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 17:35:11,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:35:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:11,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:35:11,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:11,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413353316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:11,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:11,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:35:11,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910890151] [2021-08-21 17:35:11,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:11,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:11,711 INFO L87 Difference]: Start difference. First operand 41042 states and 100334 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:12,338 INFO L93 Difference]: Finished difference Result 41536 states and 101198 transitions. [2021-08-21 17:35:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:12,455 INFO L225 Difference]: With dead ends: 41536 [2021-08-21 17:35:12,455 INFO L226 Difference]: Without dead ends: 41528 [2021-08-21 17:35:12,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:35:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-08-21 17:35:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 41258. [2021-08-21 17:35:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41258 states, 41257 states have (on average 2.4420340790653707) internal successors, (100751), 41257 states have internal predecessors, (100751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41258 states to 41258 states and 100751 transitions. [2021-08-21 17:35:13,610 INFO L78 Accepts]: Start accepts. Automaton has 41258 states and 100751 transitions. Word has length 25 [2021-08-21 17:35:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 41258 states and 100751 transitions. [2021-08-21 17:35:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 41258 states and 100751 transitions. [2021-08-21 17:35:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:13,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:13,688 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:13,712 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 17:35:13,888 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,SelfDestructingSolverStorable75 [2021-08-21 17:35:13,889 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:13,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:13,889 INFO L82 PathProgramCache]: Analyzing trace with hash 197325028, now seen corresponding path program 30 times [2021-08-21 17:35:13,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:13,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430460852] [2021-08-21 17:35:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:13,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:13,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:13,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430460852] [2021-08-21 17:35:13,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430460852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:13,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161554572] [2021-08-21 17:35:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:13,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:13,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:13,959 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 17:35:13,960 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 17:35:16,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:35:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:35:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:16,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161554572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:16,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:16,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:35:16,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487700216] [2021-08-21 17:35:16,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:16,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:16,312 INFO L87 Difference]: Start difference. First operand 41258 states and 100751 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:17,277 INFO L93 Difference]: Finished difference Result 41469 states and 101092 transitions. [2021-08-21 17:35:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:35:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:17,396 INFO L225 Difference]: With dead ends: 41469 [2021-08-21 17:35:17,396 INFO L226 Difference]: Without dead ends: 41469 [2021-08-21 17:35:17,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:35:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41469 states. [2021-08-21 17:35:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41469 to 41228. [2021-08-21 17:35:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41228 states, 41227 states have (on average 2.442210202052053) internal successors, (100685), 41227 states have internal predecessors, (100685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41228 states to 41228 states and 100685 transitions. [2021-08-21 17:35:18,372 INFO L78 Accepts]: Start accepts. Automaton has 41228 states and 100685 transitions. Word has length 25 [2021-08-21 17:35:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:18,372 INFO L470 AbstractCegarLoop]: Abstraction has 41228 states and 100685 transitions. [2021-08-21 17:35:18,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 41228 states and 100685 transitions. [2021-08-21 17:35:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:18,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:18,448 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:18,471 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 17:35:18,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:18,651 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1033027108, now seen corresponding path program 39 times [2021-08-21 17:35:18,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:18,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546362575] [2021-08-21 17:35:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:18,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:18,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:18,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546362575] [2021-08-21 17:35:18,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546362575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:18,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70463835] [2021-08-21 17:35:18,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:35:18,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:18,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:18,717 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 17:35:18,718 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 17:35:20,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:35:20,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:20,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:35:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:21,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70463835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:21,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:21,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:35:21,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905115397] [2021-08-21 17:35:21,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:21,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:21,114 INFO L87 Difference]: Start difference. First operand 41228 states and 100685 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:22,364 INFO L93 Difference]: Finished difference Result 75946 states and 176798 transitions. [2021-08-21 17:35:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:35:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:22,606 INFO L225 Difference]: With dead ends: 75946 [2021-08-21 17:35:22,606 INFO L226 Difference]: Without dead ends: 75944 [2021-08-21 17:35:22,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:35:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75944 states. [2021-08-21 17:35:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75944 to 42891. [2021-08-21 17:35:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42891 states, 42890 states have (on average 2.4465376544649104) internal successors, (104932), 42890 states have internal predecessors, (104932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42891 states to 42891 states and 104932 transitions. [2021-08-21 17:35:24,312 INFO L78 Accepts]: Start accepts. Automaton has 42891 states and 104932 transitions. Word has length 25 [2021-08-21 17:35:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:24,312 INFO L470 AbstractCegarLoop]: Abstraction has 42891 states and 104932 transitions. [2021-08-21 17:35:24,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42891 states and 104932 transitions. [2021-08-21 17:35:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:24,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:24,391 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:24,413 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 17:35:24,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:24,592 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1114595804, now seen corresponding path program 40 times [2021-08-21 17:35:24,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:24,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590743864] [2021-08-21 17:35:24,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:24,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:24,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590743864] [2021-08-21 17:35:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590743864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711868945] [2021-08-21 17:35:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:24,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:24,679 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 17:35:24,680 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 17:35:26,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:35:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:27,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711868945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:27,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:27,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-21 17:35:27,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716162567] [2021-08-21 17:35:27,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:35:27,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:35:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:35:27,010 INFO L87 Difference]: Start difference. First operand 42891 states and 104932 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:28,536 INFO L93 Difference]: Finished difference Result 81934 states and 189327 transitions. [2021-08-21 17:35:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 17:35:28,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:28,785 INFO L225 Difference]: With dead ends: 81934 [2021-08-21 17:35:28,786 INFO L226 Difference]: Without dead ends: 81934 [2021-08-21 17:35:28,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 998.8ms TimeCoverageRelationStatistics Valid=749, Invalid=2443, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:35:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81934 states. [2021-08-21 17:35:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81934 to 42556. [2021-08-21 17:35:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42556 states, 42555 states have (on average 2.4457055575138056) internal successors, (104077), 42555 states have internal predecessors, (104077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42556 states to 42556 states and 104077 transitions. [2021-08-21 17:35:30,450 INFO L78 Accepts]: Start accepts. Automaton has 42556 states and 104077 transitions. Word has length 25 [2021-08-21 17:35:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:30,451 INFO L470 AbstractCegarLoop]: Abstraction has 42556 states and 104077 transitions. [2021-08-21 17:35:30,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 42556 states and 104077 transitions. [2021-08-21 17:35:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:30,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:30,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:30,548 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 17:35:30,726 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,SelfDestructingSolverStorable78 [2021-08-21 17:35:30,727 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:30,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1659016996, now seen corresponding path program 41 times [2021-08-21 17:35:30,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:30,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646418386] [2021-08-21 17:35:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:30,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:30,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:30,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646418386] [2021-08-21 17:35:30,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646418386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:30,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956989356] [2021-08-21 17:35:30,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:35:30,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:30,802 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 17:35:30,803 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 17:35:32,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:35:32,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:32,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:35:32,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956989356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:33,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:33,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:35:33,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524692231] [2021-08-21 17:35:33,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:33,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:33,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:33,241 INFO L87 Difference]: Start difference. First operand 42556 states and 104077 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:33,965 INFO L93 Difference]: Finished difference Result 42762 states and 104454 transitions. [2021-08-21 17:35:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:35:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:34,082 INFO L225 Difference]: With dead ends: 42762 [2021-08-21 17:35:34,083 INFO L226 Difference]: Without dead ends: 42762 [2021-08-21 17:35:34,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:35:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42762 states. [2021-08-21 17:35:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42762 to 42566. [2021-08-21 17:35:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42566 states, 42565 states have (on average 2.445553858804182) internal successors, (104095), 42565 states have internal predecessors, (104095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42566 states to 42566 states and 104095 transitions. [2021-08-21 17:35:35,067 INFO L78 Accepts]: Start accepts. Automaton has 42566 states and 104095 transitions. Word has length 25 [2021-08-21 17:35:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:35,067 INFO L470 AbstractCegarLoop]: Abstraction has 42566 states and 104095 transitions. [2021-08-21 17:35:35,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 42566 states and 104095 transitions. [2021-08-21 17:35:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:35,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:35,301 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:35,330 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 17:35:35,516 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,SelfDestructingSolverStorable79 [2021-08-21 17:35:35,517 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1298766364, now seen corresponding path program 42 times [2021-08-21 17:35:35,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:35,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332417108] [2021-08-21 17:35:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:35,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:35,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:35,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332417108] [2021-08-21 17:35:35,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332417108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:35,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377119806] [2021-08-21 17:35:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:35:35,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:35,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:35,574 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 17:35:35,575 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 17:35:37,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:35:37,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:35:37,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:38,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377119806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:38,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:38,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:35:38,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283283738] [2021-08-21 17:35:38,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:35:38,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:35:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:35:38,106 INFO L87 Difference]: Start difference. First operand 42566 states and 104095 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:39,530 INFO L93 Difference]: Finished difference Result 96710 states and 225104 transitions. [2021-08-21 17:35:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 17:35:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:39,998 INFO L225 Difference]: With dead ends: 96710 [2021-08-21 17:35:39,998 INFO L226 Difference]: Without dead ends: 96710 [2021-08-21 17:35:39,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 839.1ms TimeCoverageRelationStatistics Valid=981, Invalid=2325, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:35:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96710 states. [2021-08-21 17:35:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96710 to 67253. [2021-08-21 17:35:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67253 states, 67252 states have (on average 2.487866531850354) internal successors, (167314), 67252 states have internal predecessors, (167314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67253 states to 67253 states and 167314 transitions. [2021-08-21 17:35:42,038 INFO L78 Accepts]: Start accepts. Automaton has 67253 states and 167314 transitions. Word has length 25 [2021-08-21 17:35:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:42,038 INFO L470 AbstractCegarLoop]: Abstraction has 67253 states and 167314 transitions. [2021-08-21 17:35:42,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 67253 states and 167314 transitions. [2021-08-21 17:35:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:42,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:42,494 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:42,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 17:35:42,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:42,695 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash -385275684, now seen corresponding path program 43 times [2021-08-21 17:35:42,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:42,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597455507] [2021-08-21 17:35:42,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:42,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:42,786 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 17:35:42,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:42,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597455507] [2021-08-21 17:35:42,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597455507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:42,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938424876] [2021-08-21 17:35:42,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:35:42,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:42,793 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 17:35:42,794 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 17:35:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:45,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:35:45,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:45,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938424876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:45,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:45,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:35:45,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945248811] [2021-08-21 17:35:45,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:45,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:45,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:45,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:45,267 INFO L87 Difference]: Start difference. First operand 67253 states and 167314 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:46,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:46,258 INFO L93 Difference]: Finished difference Result 67439 states and 167646 transitions. [2021-08-21 17:35:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:35:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:46,490 INFO L225 Difference]: With dead ends: 67439 [2021-08-21 17:35:46,491 INFO L226 Difference]: Without dead ends: 67439 [2021-08-21 17:35:46,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 562.3ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:35:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67439 states. [2021-08-21 17:35:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67439 to 67249. [2021-08-21 17:35:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67249 states, 67248 states have (on average 2.4878806804663336) internal successors, (167305), 67248 states have internal predecessors, (167305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67249 states to 67249 states and 167305 transitions. [2021-08-21 17:35:48,446 INFO L78 Accepts]: Start accepts. Automaton has 67249 states and 167305 transitions. Word has length 25 [2021-08-21 17:35:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:48,446 INFO L470 AbstractCegarLoop]: Abstraction has 67249 states and 167305 transitions. [2021-08-21 17:35:48,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 67249 states and 167305 transitions. [2021-08-21 17:35:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:48,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:48,601 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:48,630 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 17:35:48,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:48,806 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2038461020, now seen corresponding path program 4 times [2021-08-21 17:35:48,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:48,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507304404] [2021-08-21 17:35:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:48,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:48,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:48,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507304404] [2021-08-21 17:35:48,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507304404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:48,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666748738] [2021-08-21 17:35:48,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:35:48,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:48,856 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 17:35:48,856 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 17:35:51,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:35:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:35:51,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666748738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:51,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 17:35:51,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053787881] [2021-08-21 17:35:51,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:35:51,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:35:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:35:51,420 INFO L87 Difference]: Start difference. First operand 67249 states and 167305 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:51,950 INFO L93 Difference]: Finished difference Result 91810 states and 222486 transitions. [2021-08-21 17:35:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:35:51,950 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:52,269 INFO L225 Difference]: With dead ends: 91810 [2021-08-21 17:35:52,269 INFO L226 Difference]: Without dead ends: 91810 [2021-08-21 17:35:52,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:35:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91810 states. [2021-08-21 17:35:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91810 to 75563. [2021-08-21 17:35:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75563 states, 75562 states have (on average 2.490259654323602) internal successors, (188169), 75562 states have internal predecessors, (188169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75563 states to 75563 states and 188169 transitions. [2021-08-21 17:35:55,158 INFO L78 Accepts]: Start accepts. Automaton has 75563 states and 188169 transitions. Word has length 25 [2021-08-21 17:35:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:35:55,158 INFO L470 AbstractCegarLoop]: Abstraction has 75563 states and 188169 transitions. [2021-08-21 17:35:55,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 75563 states and 188169 transitions. [2021-08-21 17:35:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:35:55,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:35:55,295 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:35:55,317 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 17:35:55,497 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,SelfDestructingSolverStorable82 [2021-08-21 17:35:55,498 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:35:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:35:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1235862368, now seen corresponding path program 44 times [2021-08-21 17:35:55,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:35:55,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993540943] [2021-08-21 17:35:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:35:55,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:35:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:35:55,577 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 17:35:55,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:35:55,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993540943] [2021-08-21 17:35:55,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993540943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:55,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765699032] [2021-08-21 17:35:55,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:35:55,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:35:55,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:35:55,578 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 17:35:55,580 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 17:35:57,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:35:57,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:35:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:35:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:35:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:35:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765699032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:35:58,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:35:58,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:35:58,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829039790] [2021-08-21 17:35:58,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:35:58,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:35:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:35:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:35:58,248 INFO L87 Difference]: Start difference. First operand 75563 states and 188169 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:35:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:35:59,206 INFO L93 Difference]: Finished difference Result 75721 states and 188452 transitions. [2021-08-21 17:35:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:35:59,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:35:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:35:59,442 INFO L225 Difference]: With dead ends: 75721 [2021-08-21 17:35:59,443 INFO L226 Difference]: Without dead ends: 75721 [2021-08-21 17:35:59,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:35:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75721 states. [2021-08-21 17:36:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75721 to 75555. [2021-08-21 17:36:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75555 states, 75554 states have (on average 2.4903512719379517) internal successors, (188156), 75554 states have internal predecessors, (188156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75555 states to 75555 states and 188156 transitions. [2021-08-21 17:36:01,682 INFO L78 Accepts]: Start accepts. Automaton has 75555 states and 188156 transitions. Word has length 25 [2021-08-21 17:36:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:01,683 INFO L470 AbstractCegarLoop]: Abstraction has 75555 states and 188156 transitions. [2021-08-21 17:36:01,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 75555 states and 188156 transitions. [2021-08-21 17:36:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:36:01,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:01,869 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:01,892 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 17:36:02,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:02,073 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:36:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash -816414808, now seen corresponding path program 45 times [2021-08-21 17:36:02,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:02,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823304530] [2021-08-21 17:36:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:02,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:02,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:02,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823304530] [2021-08-21 17:36:02,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823304530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:02,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52073991] [2021-08-21 17:36:02,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:36:02,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:02,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:02,125 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 17:36:02,126 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 17:36:04,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:36:04,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:36:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:04,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52073991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:04,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:04,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:36:04,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414629284] [2021-08-21 17:36:04,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:04,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:04,708 INFO L87 Difference]: Start difference. First operand 75555 states and 188156 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:06,346 INFO L93 Difference]: Finished difference Result 108901 states and 262650 transitions. [2021-08-21 17:36:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 17:36:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:36:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:06,737 INFO L225 Difference]: With dead ends: 108901 [2021-08-21 17:36:06,737 INFO L226 Difference]: Without dead ends: 108895 [2021-08-21 17:36:06,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 859.4ms TimeCoverageRelationStatistics Valid=850, Invalid=2230, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 17:36:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108895 states. [2021-08-21 17:36:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108895 to 77028. [2021-08-21 17:36:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77028 states, 77027 states have (on average 2.492736313240812) internal successors, (192008), 77027 states have internal predecessors, (192008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77028 states to 77028 states and 192008 transitions. [2021-08-21 17:36:09,290 INFO L78 Accepts]: Start accepts. Automaton has 77028 states and 192008 transitions. Word has length 25 [2021-08-21 17:36:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:09,290 INFO L470 AbstractCegarLoop]: Abstraction has 77028 states and 192008 transitions. [2021-08-21 17:36:09,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 77028 states and 192008 transitions. [2021-08-21 17:36:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:36:09,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:09,430 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:09,451 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 17:36:09,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:09,630 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:36:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1289633184, now seen corresponding path program 46 times [2021-08-21 17:36:09,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:09,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232145565] [2021-08-21 17:36:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:09,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:09,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:09,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232145565] [2021-08-21 17:36:09,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232145565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:09,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315792915] [2021-08-21 17:36:09,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:36:09,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:09,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:09,693 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 17:36:09,694 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 17:36:12,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:36:12,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:36:12,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:12,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315792915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:12,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:12,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-21 17:36:12,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610763234] [2021-08-21 17:36:12,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:36:12,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:36:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:36:12,365 INFO L87 Difference]: Start difference. First operand 77028 states and 192008 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:13,893 INFO L93 Difference]: Finished difference Result 111801 states and 276954 transitions. [2021-08-21 17:36:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 17:36:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:36:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:14,484 INFO L225 Difference]: With dead ends: 111801 [2021-08-21 17:36:14,484 INFO L226 Difference]: Without dead ends: 111797 [2021-08-21 17:36:14,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 783.7ms TimeCoverageRelationStatistics Valid=647, Invalid=2005, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:36:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111797 states. [2021-08-21 17:36:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111797 to 81642. [2021-08-21 17:36:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81642 states, 81641 states have (on average 2.5040359623228525) internal successors, (204432), 81641 states have internal predecessors, (204432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81642 states to 81642 states and 204432 transitions. [2021-08-21 17:36:16,919 INFO L78 Accepts]: Start accepts. Automaton has 81642 states and 204432 transitions. Word has length 25 [2021-08-21 17:36:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:16,919 INFO L470 AbstractCegarLoop]: Abstraction has 81642 states and 204432 transitions. [2021-08-21 17:36:16,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 81642 states and 204432 transitions. [2021-08-21 17:36:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:36:17,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:17,395 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:17,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 17:36:17,608 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,SelfDestructingSolverStorable85 [2021-08-21 17:36:17,609 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:36:17,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:17,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2081468896, now seen corresponding path program 5 times [2021-08-21 17:36:17,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:17,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146945667] [2021-08-21 17:36:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:17,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:17,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:17,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146945667] [2021-08-21 17:36:17,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146945667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:17,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874152515] [2021-08-21 17:36:17,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:17,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:17,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:17,655 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 17:36:17,655 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 17:36:19,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:36:19,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:36:19,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:20,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874152515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:20,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:20,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 17:36:20,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029067106] [2021-08-21 17:36:20,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:36:20,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:36:20,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:36:20,062 INFO L87 Difference]: Start difference. First operand 81642 states and 204432 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:20,655 INFO L93 Difference]: Finished difference Result 105074 states and 257760 transitions. [2021-08-21 17:36:20,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:36:20,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:36:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:21,030 INFO L225 Difference]: With dead ends: 105074 [2021-08-21 17:36:21,030 INFO L226 Difference]: Without dead ends: 105072 [2021-08-21 17:36:21,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:36:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105072 states. [2021-08-21 17:36:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105072 to 91481. [2021-08-21 17:36:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91481 states, 91480 states have (on average 2.5031591604722343) internal successors, (228989), 91480 states have internal predecessors, (228989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91481 states to 91481 states and 228989 transitions. [2021-08-21 17:36:23,832 INFO L78 Accepts]: Start accepts. Automaton has 91481 states and 228989 transitions. Word has length 25 [2021-08-21 17:36:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:23,832 INFO L470 AbstractCegarLoop]: Abstraction has 91481 states and 228989 transitions. [2021-08-21 17:36:23,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 91481 states and 228989 transitions. [2021-08-21 17:36:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:36:24,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:24,363 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:24,416 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 17:36:24,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:24,564 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:36:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1938159396, now seen corresponding path program 47 times [2021-08-21 17:36:24,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:24,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682444090] [2021-08-21 17:36:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:24,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:24,644 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 17:36:24,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:24,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682444090] [2021-08-21 17:36:24,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682444090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:24,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899248512] [2021-08-21 17:36:24,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:36:24,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:24,646 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 17:36:24,647 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 17:36:26,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:36:26,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:36:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:27,166 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 17:36:27,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899248512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:27,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:27,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:36:27,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640526665] [2021-08-21 17:36:27,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:36:27,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:27,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:36:27,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:36:27,168 INFO L87 Difference]: Start difference. First operand 91481 states and 228989 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:27,930 INFO L93 Difference]: Finished difference Result 92268 states and 230374 transitions. [2021-08-21 17:36:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:36:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:36:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:28,385 INFO L225 Difference]: With dead ends: 92268 [2021-08-21 17:36:28,385 INFO L226 Difference]: Without dead ends: 92256 [2021-08-21 17:36:28,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:36:28,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92256 states. [2021-08-21 17:36:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92256 to 91699. [2021-08-21 17:36:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91699 states, 91698 states have (on average 2.5018539117538006) internal successors, (229415), 91698 states have internal predecessors, (229415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91699 states to 91699 states and 229415 transitions. [2021-08-21 17:36:30,857 INFO L78 Accepts]: Start accepts. Automaton has 91699 states and 229415 transitions. Word has length 25 [2021-08-21 17:36:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:30,857 INFO L470 AbstractCegarLoop]: Abstraction has 91699 states and 229415 transitions. [2021-08-21 17:36:30,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 91699 states and 229415 transitions. [2021-08-21 17:36:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:36:31,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:31,021 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:31,042 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 17:36:31,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:31,221 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:36:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:31,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1435020192, now seen corresponding path program 48 times [2021-08-21 17:36:31,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:31,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631022067] [2021-08-21 17:36:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:31,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:31,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:31,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631022067] [2021-08-21 17:36:31,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631022067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:31,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268547254] [2021-08-21 17:36:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:36:31,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:31,701 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 17:36:31,752 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 17:36:33,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:36:33,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:36:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:36:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:34,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268547254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:34,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:34,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:36:34,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575152113] [2021-08-21 17:36:34,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:34,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:34,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:34,237 INFO L87 Difference]: Start difference. First operand 91699 states and 229415 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:35,005 INFO L93 Difference]: Finished difference Result 91957 states and 229838 transitions. [2021-08-21 17:36:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:36:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:36:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:35,297 INFO L225 Difference]: With dead ends: 91957 [2021-08-21 17:36:35,297 INFO L226 Difference]: Without dead ends: 91953 [2021-08-21 17:36:35,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 698.6ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:36:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91953 states. [2021-08-21 17:36:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91953 to 91747. [2021-08-21 17:36:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91747 states, 91746 states have (on average 2.5014932531118523) internal successors, (229502), 91746 states have internal predecessors, (229502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91747 states to 91747 states and 229502 transitions. [2021-08-21 17:36:38,037 INFO L78 Accepts]: Start accepts. Automaton has 91747 states and 229502 transitions. Word has length 25 [2021-08-21 17:36:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:38,037 INFO L470 AbstractCegarLoop]: Abstraction has 91747 states and 229502 transitions. [2021-08-21 17:36:38,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 91747 states and 229502 transitions. [2021-08-21 17:36:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:36:38,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:38,201 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:38,224 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 17:36:38,401 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,SelfDestructingSolverStorable88 [2021-08-21 17:36:38,402 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:36:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash -56474720, now seen corresponding path program 49 times [2021-08-21 17:36:38,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:38,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638472559] [2021-08-21 17:36:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:38,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:38,469 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 17:36:38,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:38,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638472559] [2021-08-21 17:36:38,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638472559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:38,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199752823] [2021-08-21 17:36:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:38,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:38,471 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 17:36:38,471 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 17:36:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:36:40,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:41,220 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 17:36:41,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199752823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:41,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:41,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:36:41,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795590472] [2021-08-21 17:36:41,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:41,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:41,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:41,221 INFO L87 Difference]: Start difference. First operand 91747 states and 229502 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:42,163 INFO L93 Difference]: Finished difference Result 91924 states and 229797 transitions. [2021-08-21 17:36:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:36:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:36:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:42,453 INFO L225 Difference]: With dead ends: 91924 [2021-08-21 17:36:42,453 INFO L226 Difference]: Without dead ends: 91924 [2021-08-21 17:36:42,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:36:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91924 states. [2021-08-21 17:36:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91924 to 91647. [2021-08-21 17:36:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91647 states, 91646 states have (on average 2.502193221744539) internal successors, (229316), 91646 states have internal predecessors, (229316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91647 states to 91647 states and 229316 transitions. [2021-08-21 17:36:45,206 INFO L78 Accepts]: Start accepts. Automaton has 91647 states and 229316 transitions. Word has length 25 [2021-08-21 17:36:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:36:45,207 INFO L470 AbstractCegarLoop]: Abstraction has 91647 states and 229316 transitions. [2021-08-21 17:36:45,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 91647 states and 229316 transitions. [2021-08-21 17:36:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:36:45,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:36:45,373 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:36:45,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 17:36:45,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:45,574 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:36:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:36:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash 32678432, now seen corresponding path program 31 times [2021-08-21 17:36:45,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:36:45,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728826062] [2021-08-21 17:36:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:36:45,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:36:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:36:45,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:36:45,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728826062] [2021-08-21 17:36:45,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728826062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:45,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514067176] [2021-08-21 17:36:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:36:45,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:36:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:36:45,628 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 17:36:45,629 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 17:36:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:36:48,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:36:48,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:36:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:36:48,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514067176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:36:48,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:36:48,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 17:36:48,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400967175] [2021-08-21 17:36:48,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:36:48,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:36:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:36:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:36:48,426 INFO L87 Difference]: Start difference. First operand 91647 states and 229316 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:36:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:36:49,213 INFO L93 Difference]: Finished difference Result 91914 states and 229761 transitions. [2021-08-21 17:36:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:36:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:36:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:36:49,606 INFO L225 Difference]: With dead ends: 91914 [2021-08-21 17:36:49,607 INFO L226 Difference]: Without dead ends: 91910 [2021-08-21 17:36:49,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:36:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91910 states.